Colored glass article having enhanced mechanical durability

Abstract

The colored glass article is composed of 50 to 80 mol % SiO, 7 to 20 mol % AlO, 1 to 35 mol % RO (wherein RO includes at least one of LiO, NaO, and KO), and 1×10 -6 % to 10 mol % of a colorant (wherein the colorant includes at least one of Cr2O3, Au, Ag, CuO, NiO, Co3O4, TiO2, and CeO2), and 12 to 24 mol % of Al2O3+MgO+CaO+ZnO. The colored glass article may have a transmission color coordinate in the CIELAB color space with an L* value of 55 to 96.5. The colored glass article may have a compressive stress profile with a compression depth of 0.15t or more for a thickness t of 0.4 mm to 5 mm, a compressive stress of 200 MPa or more, and a central tension of 60 MPa or more. The colored glass article may have a dielectric constant of 5.6 to 6.4 in a frequency range of 10 GHz to 60 GHz.

Description

Cross - reference to related applications

[0001] This application claims the benefit of priority of U.S. Provisional Patent Application No. 63 / 212,191 filed on June 18, 2021, U.S. Provisional Patent Application No. 63 / 304,807 filed on January 31, 2022, U.S. Patent Application No. 17 / 677,345 filed on February 22, 2022, U.S. Provisional Patent Application No. 63 / 212,179 filed on June 18, 2021, U.S. Provisional Patent Application No. 63 / 251,785 filed on October 4, 2021, U.S. Patent Application No. 17 / 677,375 filed on February 22, 2022, U.S. Provisional Patent Application No. 63 / 283,600 filed on November 29, 2021, U.S. Provisional Patent Application No. 63 / 286,316 filed on December 6, 2021, U.S. Patent Application No. 17 / 691,813 filed on March 10, 2022, U.S. Provisional Patent Application No. 63 / 318,553 filed on March 10, 2022, U.S. Provisional Patent Application No. 63 / 347,095 filed on May 31, 2022, U.S. Provisional Patent Application No. 63 / 347,201 filed on May 31, 2022, and U.S. Provisional Patent Application No. 63 / 347,157 filed on May 31, 2022, the entire contents of each of which are hereby incorporated by reference herein.

Technical Field

[0002] This specification generally relates to glass compositions and glass articles, and more particularly, to glass compositions and ion - exchangeable colored glass articles formed from such glass compositions.

Background Art

[0003] Aluminosilicate glass articles can exhibit excellent ion - exchangeability and drop - resistance performance. In various industries such as the consumer electronics industry, there is a desire for colored materials that have strength and fracture toughness characteristics equivalent to or similar to those of existing non - colored ion - exchanged strengthened glass. However, simply incorporating a colorant into a conventional aluminosilicate glass composition may not be able to develop the desired color in some cases. Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, there is a need for an alternative colored glass article that has high strength and fracture toughness. [Means for solving the problem]

[0005] Aspect A1 is 50 mol % to 80 mol % SiO 2 and 7 mol% to 20 mol% Al 2 O 3 and 1 mol% or more and 35 mol% or less of R 2 O and Li 2 O, Na 2 O and K 2 R containing at least one of O 2 O and 1 x 10 -6 A colorant containing more than 10 mol % or less of Cr 2 O 3 , Au, Ag, CuO, NiO, Co 3 O 4 , TiO 2 , CEO 2 and a colorant containing at least one of the above, 2 O 3 The colored glass article includes a colored glass article containing +MgO+CaO+ZnO, which has a transmission color coordinate in the CIELAB color space of an L* value of 55 or more and 96.5 or less, measured under conditions of F2 illumination and a standard observer with a 10° field of view, and has a compressive stress profile of a compression depth of 0.15t or more, a compressive stress of 200 MPa or more, and a central tension of 60 MPa or more, where t is the thickness of the colored glass article, a dielectric constant of 5.6 to 6.4 in the frequency range of 10 GHz to 60 GHz, and a thickness t of 0.4 mm or more and 5 mm or less.

[0006] Embodiment A2 includes the colored glass article of embodiment A1 having a thickness, t, of at least 0.5 mm and at most 5 mm.

[0007] Aspect A3 includes a colored glass article having a fracture toughness K of a colored glass article having the same composition and microstructure as the central portion of the colored glass article IC of 0.7 MPa·m 1 / 2 or more

[0008] Aspect A4 includes a colored glass article having an average transmittance in the wavelength range of 380 nm to 750 nm of 10% or more and 92% or less

[0009] Aspect A5 includes a colored glass article further including at least one crystal phase

[0010] Aspect A6 includes a colored glass article having a crystallinity of less than 10% by mass

[0011] Aspect A7 includes a colored glass article having a compression depth of 0.3 t or less

[0012] Aspect A8 includes a colored glass article having a surface compressive stress of 400 MPa or more

[0013] Aspect A9 includes a colored glass article having a central tension of 70 MPa or more

[0014] Aspect A10 includes a colored glass article having transmission color coordinates in the CIELAB color space including an a* value and |a*| ≥ 0.3

[0015] Aspect A11 includes a colored glass article having transmission color coordinates in the CIELAB color space including a b* value and |b*| ≥ 0.5

[0016] Aspect A12 includes a colored glass article having transmission color coordinates in the CIELAB color space including an a* value and a b* value, |a*| ≥ 0.3 and |b*| ≥ 0.5

[0017] Aspect A13 includes a colored glass article in which the transmission color coordinates in the CIELAB color space include a* value and b* value, and the a* value and b* value are within the a* vs. b* graph region surrounded by the intersections of the straight lines b* = 0.2879·a* + 27.818, b* = 7.0833·a* - 94.5, b* = 0.45·a* + 104.5, and b* = 15.3·a* + 253.

[0018] Aspect A14 includes the colored glass article of Aspect A13, wherein the colorant contains Ag.

[0019] Aspect A15 includes a colored glass article of any one of Aspects A1 to A12, in which the transmission color coordinates in the CIELAB color space include a* value and b* value, and the a* value and b* value are within the a* vs. b* graph region surrounded by the intersections of the straight lines b* = 7.0833·a* - 94.5, b* = -0.9583·a* + 146.75, b* = 2.6957·a* - 50.565, and b* = 33.

[0020] Aspect A16 includes the colored glass article of Aspect A15, wherein the colorant contains Ag.

[0021] Aspect A17 includes a colored glass article of any one of Aspects A1 to A12, in which the transmission color coordinates in the CIELAB color space include a* value and b* value, and the a* value and b* value are within the a* vs. b* graph region surrounded by the intersections of the straight lines b* = 2.6957·a* - 50.565, a* = 54, b* = 1.0769·a* - 17.154, and b* = 6.6667·a* - 173.67.

[0022] Aspect A18 includes the colored glass article of Aspect A17, wherein the colorant contains Ag.

[0023] Aspect A19 includes a colored glass article of any one of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include a* value and b* value, the a* value and b* value are surrounded by the intersection of the straight lines b* = 0.2879·a* + 27.818, a* = 0, b* = -1.375·a* + 1, and b* = 9.333·a* + 86.667, except when a* is greater than -0.3 and less than 0.3, and except when b* is greater than -0.5 and less than 0.5, and is within the a* vs. b* graph region.

[0024] Aspect A20 includes the colored glass article of Aspect A19, wherein the colorant contains Ag.

[0025] Aspect A21 includes a colored glass article of any one of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include a* value and b* value, the a* value and b* value are surrounded by the intersection of the straight lines b* = 0.0833·a* + 20.833, b* = 2.1182·a* - 32.073, b* = -0.3, and b* = 1.5929·a* - 0.3, except when a* is greater than -0.3 and less than 0.3, and except when b* is greater than -0.5 and less than 0.5, and is within the a* vs. b* graph region.

[0026] Aspect A22 includes the colored glass article of Aspect A21, wherein the colorant contains Ag.

[0027] Aspect A23 includes a colored glass article of any one of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include a* value and b* value, the a* value is -18 or more and 0.3 or less, and the b* value is 0.5 or more and 82 or less.

[0028] Aspect A24 includes the colored glass article of Aspect A23, wherein the colorant contains Cr 2 O 3 and.

[0029] Aspect A25 includes any of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -18 or more and 18 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is 0.5 or more and 82 or less.

[0030] Aspect A26 includes the colored glass article of Aspect A25, which contains Cr 2 O 3 and NiO.

[0031] Aspect A27 includes any of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -20 or more and 60 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 85 or less, except when the b* value is more than -0.5 and less than 0.5.

[0032] Aspect A28 includes the colored glass article of Aspect A27, which contains Cr 2 O 3 and Co 3 O 4 and.

[0033] Aspect A29 includes any of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and -0.3 or less, and the b* value is 0.5 or more and 82 or less.

[0034] Aspect A30 includes the colored glass article of Aspect A29, which contains Cr 2 O 3 and CuO.

[0035] Aspect A31 includes any of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and 20 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is 0.5 or more and 75 or less.

[0036] Aspect A32 includes the colored glass article of Aspect A31, which contains Cr as a colorant 2 O 3 , NiO, and CuO.

[0037] Aspect A33 includes any one of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -15 or more and 65 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 80 or less, except when the b* value is more than -0.5 and less than 0.5.

[0038] Aspect A34 includes the colored glass article of Aspect A33, which contains Cr 2 O 3 , NiO, and Co 3 O 4 .

[0039] Aspect A35 includes any one of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and 60 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 80 or less, except when the b* value is more than -0.5 and less than 0.5.

[0040] Aspect A36 includes the colored glass article of Aspect A35, which contains Cr 2 O 3 , CuO, and Co 3 O 4 .

[0041] Aspect A37 includes any one of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and 60 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 80 or less, except when the b* value is more than -0.5 and less than 0.5.

[0042] Aspect A38 includes Cr as a colorant 2 O 3, NiO, CuO, and Co 3 O 4 including a colored glass article of Aspect A37 containing the same.

[0043] Aspect A39 includes a colored glass article of any one of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -15 or more and -0.3 or less, and the b* value is -10 or more and 10 or less, provided that the case where the b* value is more than -0.5 and less than 0.5 is excluded.

[0044] Aspect A40 includes a colored glass article of Aspect A39 containing at least one of NiO, CuO, TiO 2 , Co 3 O 4 , Cr 2 O 3 , and CeO 2 in the coloring agent.

[0045] Aspect A41 includes a colored glass article of any one of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -5 or more and 25 or less, provided that the case where the a* value is more than -0.3 and less than 0.3 is excluded, and the b* value is -20 or more and 5 or less, provided that the case where the b* value is more than -0.5 and less than 0.5 is excluded.

[0046] Aspect A42 includes a colored glass article of Aspect A41 containing Au in the coloring agent.

[0047] Aspect A43 includes a colored glass article of any one of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -10 or more and 25 or less, provided that the case where the a* value is more than -0.3 and less than 0.3 is excluded, and the b* value is -20 or more and 5 or less, provided that the case where the b* value is more than -0.5 and less than 0.5 is excluded.

[0048] Aspect A44 includes a colored glass article of Aspect A43 containing Au in the coloring agent.

[0049] Aspect A45 includes any one of the colored glass articles of Aspects A1 to A12, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -15 or more and -0.3 or less, and the b* value is -10 or more and 10 or less, provided that the case where the b* value is more than -0.5 and less than 0.5 is excluded.

[0050] Aspect A46 includes the colored glass article of Aspect A45, which contains at least one of Cr 2 O 3 , Au, Ag, CuO, NiO, Co 3 O 4 , TiO 2 , and CeO 2 .

[0051] Aspect A47 includes an electronic device including a housing that contains the colored glass article according to any of the preceding aspects.

[0052] Aspect A48 includes 50 mol% or more and 80 mol% or less of SiO 2 , 7 mol% or more and 20 mol% or less of Al 2 O 3 , 1 mol% or more and 35 mol% or less of R 2 O, where R 2 O, Na 2 O, and K 2 O, and at least one of R 2 O contains at least one of Li -6 O, 1×10 2 mol% or more and 10 mol% or less of a colorant, which contains at least one of Cr 3 O 3 , Au, Ag, CuO, NiO, Co 4 O 2 , TiO 2 , and CeO 2 O 3A colored glass article containing +MgO+CaO+ZnO, having transmission color coordinates in the CIELAB color space with an L* value of 55 or more and 96.5 or less measured under the conditions of F2 illumination and a 10° field-of-view standard observer, a compression depth of 0.15t or more, a compression stress of 200 MPa or more, and a central tension of 60 MPa or more when the thickness of the colored glass article is t, a dielectric constant of 5.6 to 6.4 in the frequency range of 10 GHz to 60 GHz, and a thickness t of 0.4 mm or more and 5 mm or less.

[0053] Aspect A49 includes the colored glass article of Aspect A48, wherein the thickness t is 0.5 mm or more and 5 mm or less.

[0054] Aspect A50 includes a colored glass article having a fracture toughness K of the colored glass article having the same composition and microstructure as the central portion of the colored glass article IC of 0.7 MPa·m 1 / 2 or more.

[0055] Aspect A51 includes a colored glass article having an average transmittance in the wavelength range of 380 nm to 750 nm of 10% or more and 92% or less.

[0056] Aspect A52 includes a colored glass article further including at least one crystal phase.

[0057] Aspect A53 includes a colored glass article having a crystallinity of less than 10% by mass.

[0058] Aspect A54 includes a colored glass article having a compression depth of 0.3t or less.

[0059] Aspect A55 includes a colored glass article having a surface compression stress of 400 MPa or more.

[0060] Aspect A56 includes a colored glass article having a central tension of 70 MPa or more.

[0061] Aspect A57 includes a colored glass article whose transmission color coordinates in the CIELAB color space include an a* value and |a*|≧0.3.

[0062] Aspect A58 includes a colored glass article in which the transmission color coordinates in the CIELAB color space include a b* value and |b*| ≧ 0.5.

[0063] Aspect A59 includes a colored glass article in which the transmission color coordinates in the CIELAB color space include an a* value and a b* value, and |a*| ≧ 0.3 and |b*| ≧ 0.5.

[0064] Aspect A60 includes a colored glass article in which the transmission color coordinates in the CIELAB color space include an a* value and a b* value, and the a* value and the b* value are within the a* vs. b* graph region surrounded by the intersection of the lines b* = 0.2879·a* + 27.818, b* = 7.0833·a* - 94.5, b* = 0.45·a* + 104.5, and b* = 15.3·a* + 253.

[0065] Aspect A61 includes the colored glass article of Aspect A60, wherein the colorant contains Ag.

[0066] Aspect A61 includes a colored glass article in which the transmission color coordinates in the CIELAB color space include an a* value and a b* value, and the a* value and the b* value are within the a* vs. b* graph region surrounded by the intersection of the lines b* = 7.0833·a* - 94.5, b* = -0.9583·a* + 146.75, b* = 2.6957·a* - 50.565, and b* = 33, and is any one of the colored glass articles of Aspects A48 to A59.

[0067] Aspect A62 includes the colored glass article of Aspect A61, wherein the colorant contains Ag.

[0068] Aspect A63 includes a colored glass article in which the transmission color coordinates in the CIELAB color space include an a* value and a b* value, and the a* value and the b* value are within the a* vs. b* graph region surrounded by the intersection of the lines b* = 2.6957·a* - 50.565, a* = 54, b* = 1.0769·a* - 17.154, and b* = 6.6667·a* - 173.67, and is any one of the colored glass articles of Aspects A48 to A59.

[0069] Aspect A64 includes the colored glass article of Aspect A63, which contains Ag in the colorant.

[0070] Aspect A65 includes any one of the colored glass articles of Aspects A48 to A59, wherein the transmission color coordinates in the CIELAB color space include a* value and b* value, and the a* value and b* value are enclosed by the intersection of the straight lines b* = 0.2879·a* + 27.818, a* = 0, b* = -1.375·a* + 1, and b* = 9.333·a* + 86.667, except when a* is greater than -0.3 and less than 0.3, and except when b* is greater than -0.5 and less than 0.5, and is within the a* vs b* graph region.

[0071] Aspect A66 includes the colored glass article of Aspect A65, which contains Ag in the colorant.

[0072] Aspect A67 includes any one of the colored glass articles of Aspects A48 to A59, wherein the transmission color coordinates in the CIELAB color space include a* value and b* value, and the a* value and b* value are enclosed by the intersection of the straight lines b* = 0.0833·a* + 20.833, b* = 2.1182·a* - 32.073, b* = -0.3, and b* = 1.5929·a* - 0.3, except when a* is greater than -0.3 and less than 0.3, and except when b* is greater than -0.5 and less than 0.5, and is within the a* vs b* graph region.

[0073] Aspect A68 includes the colored glass article of Aspect A67, which contains Ag in the colorant.

[0074] Aspect A69 includes any one of the colored glass articles of Aspects A58 to A59, wherein the transmission color coordinates in the CIELAB color space include a* value and b* value, the a* value is -18 or more and 0.3 or less, and the b* value is 0.5 or more and 82 or less.

[0075] Aspect A70 includes the colored glass article of Aspect A69, which contains Cr 2 O 3 in the colorant.

[0076] Aspect A71 includes any of the colored glass articles of Aspects A48 to A59, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -18 or more and 18 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is 0.5 or more and 82 or less.

[0077] Aspect A72 includes the colored glass article of Aspect A71, which contains Cr 2 O 3 and NiO.

[0078] Aspect A73 includes any of the colored glass articles of Aspects A48 to A59, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -20 or more and 60 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 85 or less, except when the b* value is more than -0.5 and less than 0.5.

[0079] Aspect A74 includes the colored glass article of Aspect A73, which contains Cr 2 O 3 and Co 3 O 4 and CoO.

[0080] Aspect A75 includes any of the colored glass articles of Aspects A48 to A59, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and -0.3 or less, and the b* value is 0.5 or more and 82 or less.

[0081] Aspect A76 includes the colored glass article of Aspect A75, which contains Cr 2 O 3 and CuO.

[0082] Aspect A77 includes any of the colored glass articles of Aspects A48 to A59, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and 20 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is 0.5 or more and 75 or less.

[0083] Aspect A78 includes the colored glass article of Aspect A77 containing Cr 2 O 3 , NiO, and CuO.

[0084] Aspect A79 includes any of the colored glass articles of Aspects A48 - A59 where the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -15 or more and 65 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 80 or less, except when the b* value is more than -0.5 and less than 0.5.

[0085] Aspect A80 includes the colored glass article of Aspect A79 containing Cr 2 O 3 , NiO, and Co 3 O 4 .

[0086] Aspect A81 includes any of the colored glass articles of Aspects A48 - A59 where the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and 60 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 80 or less, except when the b* value is more than -0.5 and less than 0.5.

[0087] Aspect A82 includes the colored glass article of Aspect A81 containing Cr 2 O 3 , CuO, and Co 3 O 4 .

[0088] Aspect A83 includes any of the colored glass articles of Aspects A48 - A59 where the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -35 or more and 60 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -90 or more and 80 or less, except when the b* value is more than -0.5 and less than 0.5.

[0089] Aspect A84 includes Cr as a colorant 2 O3 , NiO, CuO, and Co 3 O 4 including the colored glass article of Aspect A83 containing

[0090] Aspect A84 includes any of the colored glass articles of Aspects A48 - A59 where the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -15 or more and -0.3 or less, the b* value is -10 or more and 10 or less, except when the b* value is more than -0.5 and less than 0.5.

[0091] Aspect A85 includes the colored glass article of Aspect A84 containing at least one of NiO, CuO, TiO 2 , Co 3 O 4 , Cr 2 O 3 , and CeO 2 in it.

[0092] Aspect A86 includes any of the colored glass articles of Aspects A48 - A59 where the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -5 or more and 25 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -20 or more and 5 or less, except when the b* value is more than -0.5 and less than 0.5.

[0093] Aspect A87 includes the colored glass article of Aspect A86 containing Au as a colorant.

[0094] Aspect A88 includes any of the colored glass articles of Aspects A48 - A59 where the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -10 or more and 25 or less, except when the a* value is more than -0.3 and less than 0.3, and the b* value is -20 or more and 5 or less, except when the b* value is more than -0.5 and less than 0.5.

[0095] Aspect A89 includes the colored glass article of Aspect A88 containing Au as a colorant.

[0096] Aspect A90 includes a colored glass article according to any one of Aspects A48 to A59, wherein the transmission color coordinates in the CIELAB color space include an a* value and a b* value, the a* value is -15 or more and -0.3 or less, and the b* value is -10 or more and 10 or less, except when the b* value is more than -0.5 and less than 0.5.

[0097] Aspect A91 includes a colored glass article of Aspect A90, which contains at least one of Cr 2 O 3 , Au, Ag, CuO, NiO, Co 3 O 4 , TiO 2 , and CeO 2 .

[0098] Aspect A92 includes an electronic device including a housing including a colored glass article according to any of the preceding aspects.

[0099] In the following detailed description, further features and advantages of the colored glass articles described herein are set forth. The following further features and advantages will be readily understood by those of ordinary skill in the art to some extent from the description, or alternatively, may be understood by practicing the embodiments described herein, which include the following detailed description, the claims, and the accompanying drawings.

[0100] It should be understood that both the foregoing general description and the following detailed description are intended to describe various embodiments and provide an overview or framework for understanding the nature and characteristics of the claimed subject matter. The accompanying drawings are provided to further understand the various embodiments and are incorporated herein and constitute a part hereof. The drawings illustrate the various embodiments described herein and, together with the following detailed description, are intended to explain the principles and operations of the claimed subject matter.

Brief Description of the Drawings

[0101]

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Figure 55

Mode for Carrying Out the Invention

[0102] Hereinafter, various embodiments of a glass composition and a colored glass article having a desired color formed from the glass composition will be described in detail. According to a plurality of embodiments, the colored glass article contains 50 mol% or more and 80 mol% or less of SiO 2 and 7 mol% or more and 20 mol% or less of Al 2 O 3 and 1 mol% or more and 35 mol% or less of R 2 O (where R 2 O contains at least one of Li 2 O, Na 2 O, and K 2 O), and more than 1×10 -6 mol% and 10 mol% or less of a colorant (where the colorant contains at least one of Cr 2 O 3 , Au, Ag, CuO, NiO, Co 3 O 4 , TiO 2 , CeO 2 ), and contains 12 mol% or more and 24 mol% or less of Al 2 O 3It contains +MgO +CaO +ZnO. Further, the colored glass article has transmission color coordinates in the CIELAB color space with an L* value of 55 or more and 96.5 or less, measured under the conditions of F2 illumination and a 10° field-of-view standard observer, a compression depth of 0.15t or more, a compression stress of 200 MPa or more, and a central tension of 60 MPa or more, where t is the thickness of the colored glass article, a dielectric constant of 5.6 to 6.4 in the frequency range of 10 GHz to 60 GHz, and a thickness t of 0.4 mm or more and 5 mm or less. Hereinafter, various embodiments of the colored glass article will be described with specific reference to the accompanying drawings.

[0103] In this specification, ranges may be expressed in the form of "about" a certain value or more, "about" a certain value to "about" another certain value, or "about" the other certain value or less. When a range is expressed in such a form, there are other embodiments that include the certain value to the other certain value. Similarly, when a value is expressed as an approximate value by prefixing "about" thereto, it will be understood that there are also other embodiments constituted by the specific value itself. Also, it will be understood that the meanings of the two endpoints of each range are correlated with each other and are also independent of each other.

[0104] In this specification, directional terms (e.g., up, down, right, left, front, back, top, bottom, etc.) are only with reference to the drawings and are not intended to mean absolute directions.

[0105] Unless otherwise specified, it is not intended that any method described in this specification be construed as requiring that each step be performed in a specific order, nor is it intended that any device require a specific orientation. Accordingly, unless the order of the steps is actually recited in a method claim, or the order or orientation of the individual components is actually recited in an apparatus claim, or unless otherwise the specification of the claims or the detailed description of the invention clearly states that each step is limited to a specific order, and unless a specific order or orientation of the components of the apparatus is described, it is not intended that the order (sequence) or orientation be inferred in any way. This applies to any non-explicit matter that can be a basis for interpretation, such as the argument about the order of each step, the flow of operation, the order of components, or the orientation of components, the grammatical structure or the common meaning derived from punctuation, the number or type of embodiments described in this specification, etc.

[0106] As used herein, the singular forms “a,” “an,” and “the” include references to the corresponding plural forms as well, unless the context clearly indicates otherwise. Thus, for example, a reference to a component introduced by the article “a” includes embodiments having two or more of that component, unless the context clearly indicates otherwise.

[0107] In embodiments of the glass compositions and colored glass articles obtained therefrom described herein, unless otherwise specified, the concentrations of the components in oxide form (e.g., SiO 2 , Al 2 O 3 , etc.) are expressed in mole percent (mol%) on an oxide basis.

[0108] In embodiments of the glass compositions and colored glass articles obtained therefrom described herein, unless otherwise specified, the concentrations of Au and Cl are expressed in mole percent (mol%).

[0109] In embodiments of the glass compositions and colored glass articles obtained therefrom described herein, unless otherwise specified, the concentration of cation "M" is expressed in mole percent (mol%).

[0110] The term "substantially free" is used to describe the concentration and / or absence of a particular constituent in a glass composition and a colored glass article obtained therefrom, meaning that the constituent is not intentionally added to the glass composition and the colored glass article obtained therefrom. However, unless otherwise specified herein, the constituent may be included in the glass composition and the colored glass article obtained therefrom in an amount less than 200 ppm as a minor residue or contaminant. Note that Au is not included in the definition of "substantially free". Au can be intentionally added to the glass composition from which the colored glass article is derived in a relatively small amount (e.g., but not limited to, an amount less than 200 ppm (or the corresponding mol%)) to achieve a desired color in the colored glass article.

[0111] The terms "0 mol% (0 mol%)" and "free" are used to describe the concentration and / or absence of a particular constituent in a glass composition, meaning that the constituent is not present in the glass composition.

[0112] Fracture toughness (K IC ) represents the fracture resistance performance of the glass composition. For example, before performing ion exchange (IOX) treatment on a glass article, K ICFracture toughness, such as by measuring values, is measured in non-strengthened glass articles and represents the characteristics of the glass substrate before ion exchange. The fracture toughness test method described in this specification is not suitable for glass that has undergone ion exchange treatment. Therefore, when describing the fracture toughness of an article after ion exchange treatment, the fracture toughness means the fracture toughness of an article that has not undergone ion exchange treatment and has the same composition and microstructure (if any) as the central part of the article after ion exchange treatment (that is, a point at a distance of at least 0.5t from each surface of the article or substrate, where t is the thickness of the article or substrate). The central part of the article after ion exchange treatment corresponds to the part of the article after ion exchange treatment that is least affected by the ion exchange process, and therefore its composition and microstructure are equivalent to those of glass that has not undergone ion exchange treatment. Fracture toughness was measured by the chevron notched short bar (CNSB) method. The chevron notched short bar (CNSB) method is disclosed in Reddy, K.P.R. et al., "Fracture Toughness Measurement of Glass and Ceramic Materials Using Chevron-Notched Specimens", J. Am. Ceram. Soc., 71[6], C-310-C-313 (1988). However, Y* mwas calculated using Equation 5 of "Closed-Form Expressions for Crack-Mouth Displacement and Stress Intensity Factors for Chevron-Notched Short Bar and Short Rod Specimens Based on Experimental Compliance Measurements" by Bubsey, R.T. et al., NASA Technical Memorandum 83796, pages 1-30 (October 1992). Unless otherwise noted, all fracture toughness values were measured by the chevron-notch short bar (CNSB) method.

[0113] However, for some specimens, instead of this, the fracture toughness K ICThe measurement was performed by the double cantilever beam (DCB) method. Fig. 49 shows the shape of the DCB specimen. In the figure, as parameters, the crack length a, the applied load P, the cross-sectional dimensions w and 2h, and the depth (in the thickness direction) b of the crack guiding groove are shown. The specimen was cut into a rectangle with a width 2h of 1.25 cm and a thickness w of 0.3 mm to 1 mm. Note that the total length of the specimen (not an important dimension) varied in the range of 5 cm to 10 cm. Also, as a means for attaching the specimen to the specimen holder and the load, holes were drilled at both ends with a diamond drill. Next, a crack "guiding groove" was cut on both flat surfaces over the entire length of the specimen with a wafer dicing saw equipped with a diamond blade, leaving a "web" of specimen material about half of the total plate thickness (dimension b in Fig. 49) at a height of 180 μm corresponding to the thickness of the blade. Due to the high-precision dimensional tolerance of the dicing saw, the variation between specimens can be minimized. Also, an initial crack with a = 15 mm was cut using this dicing saw. By this last process, the material near the tip of the crack became a very thin wedge shape (due to the curvature of the blade), making the specimen in a state where cracks are likely to occur. Then, a steel wire was passed through the hole on the lower side of this specimen and attached to a metal specimen holder. Also, the other end of the specimen was supported so that the specimen would be kept horizontal even under a low load state. Next, a spring serially attached to a load cell (FUTEK, LSB200) was hooked into the upper hole, and the load was gradually applied by stretching it using a rope and a high-precision sliding device. Then, the crack was observed with a microscope with a resolution of 5 μm equipped with a digital camera and a computer. The stress intensity factor K P was determined by the following formula.

[0114]

Equation

[0115] For each sample, first a crack was generated at the tip of the mesh, and then, starting from this starter crack, subcritical crack growth was carefully induced until the dimension ratio a / h exceeded 1.5, and the stress intensity was accurately calculated. At this time, the crack length a was measured and recorded using a mobile microscope with a resolution of 5 μm. Next, a drop of toluene was dropped into the crack groove and wicked along the length of the groove by capillary force to pin the crack and keep the crack immobile until the fracture toughness was reached. Then, the load was increased until the sample was fractured, and the critical stress intensity K IC was determined from the fracture load and the sample dimensions. Note that due to the measurement method, K P is equivalent to K IC .

[0116] The viscosity of the glass composition described in this specification is measured in accordance with ASTM standard C965-96.

[0117] In this specification, the term "melting point" refers to the temperature at which the viscosity of the glass composition becomes 200 poises.

[0118] In this specification, the term "softening point" refers to the temperature at which the viscosity of the glass composition becomes 1×10 7.6 poises. The softening point is measured in accordance with the parallel plate viscometry method of measuring the viscosity of inorganic glass as a function of temperature from 10 7 poises to 10 9 poises, similar to ASTM standard C1351M.

[0119] In this specification, the term "annealing point" refers to the temperature at which the viscosity of the glass composition becomes 1×10 13.18 poises.

[0120] In this specification, the term "strain point" refers to the temperature at which the viscosity of the glass composition becomes 1×10 14.68 poises.

[0121] The terms "coefficient of thermal expansion" and "CTE" described in this specification are values measured in the temperature range of 25°C to 300°C in accordance with ASTM standard E228-85, and are expressed as the average value in the unit of "×10 -7 / °C" in this temperature range.

[0122] In this specification, the term "liquidus viscosity" refers to the viscosity of the glass composition when devitrification begins (i.e., at the liquidus temperature determined by the gradient furnace method in accordance with ASTM standard C829-81).

[0123] In this specification, the term "liquidus temperature" refers to the temperature at which devitrification of the glass composition begins, determined by the gradient furnace method in accordance with ASTM standard C829-81.

[0124] The surface compressive stress can be measured with a surface stress meter (FSM) such as a commercially available instrument (e.g., FSM-6000 manufactured by Orihara Seisakusho Co., Ltd. (Japan)). To measure the surface stress, it is necessary to measure the stress optical coefficient (SOC) related to the birefringence of the glass article. On the other hand, the stress optical coefficient is measured in accordance with Procedure C (glass disk method) described in ASTM standard C770-16 "Standard Test Method for Measurement of Glass Stress-Optical Coefficient". It should be noted that all the contents described herein are incorporated herein by reference. The depth of compression (DOC) is also measured with an FSM. The maximum center tension (maximum CT) value can be measured using a scattered light polariscope (SCALP) technique known in the art.

[0125] As used herein, the term "depth of compression" (DOC) refers to the position within an article where the compression stress changes to tensile stress.

[0126] Transmittance data in the visible spectrum (total transmittance and diffuse transmittance) were measured using a UV / Vis / NIR spectrophotometer Lambda 950 manufactured by PerkinElmer Inc. (Waltham, Massachusetts, USA). A 150 mm integrating sphere was attached to the Lambda 950 instrument. Data were collected using a Spectralon® standard reflector with the sample position left empty (open beam) as the reference value. The total transmittance (Total Tx) was measured with the sample fixed at the entrance point of the integrating sphere.

[0127] As used herein, the term "average transmittance" with respect to the visible spectrum refers to the weighted average of transmittance measurements made within a predetermined wavelength range (equally weighted for each integer wavelength). In the embodiments described herein, the "average transmittance" with respect to the visible spectrum refers to the average over the wavelength range from 380 nm to 750 nm. Also, unless otherwise specified, the average transmittance refers to the value for an article having a thickness of 0.4 mm or more and 5 mm or less. Thus, unless otherwise specified, when indicating the average transmittance, it means that the average transmittance for each thickness within the thickness range of 0.4 mm to 5 mm is the stated average transmittance. For example, in the case of a colored glass article having an average transmittance of 10% to 92% in the wavelength range of 380 nm to 750 nm, it means that for each thickness within the range of 0.4 mm to 5 mm (e.g., 0.6 mm, 0.9 mm, 2 mm, etc.), the average transmittance with respect to the wavelength range of 380 nm to 750 nm is in the range of 10% to 92%.

[0128] As used herein, the term "CIELAB color space" refers to the color space established by the International Commission on Illumination (CIE) in 1976. The CIELAB color space represents color with three values: lightness L* from black (0) to white (100), a* from green (negative value) to red (positive value), and b* from blue (negative value) to yellow (positive value). Unless otherwise specified, the L*, a*, and b* values indicate the values measured in the thickness direction of a sample under the conditions of F2 illumination and a 10° field standard observer for an article with a thickness of 0.4 mm or more and 5 mm or less. That is, unless otherwise specified, the L*, a*, and b* coordinates for each thickness within this thickness range are included in the range of L*, a*, and b* coordinates specified in this specification. For example, if the L* value of a colored glass article is in the range of 55 to 96.5, it means that the L* for each thickness in the range of 0.4 mm to 5 mm (e.g., 0.6 mm, 0.9 mm, 2 mm, etc.) is in the range of 55 to 96.5.

[0129] As used herein, the term "color gamut" refers to the color palette that a colored glass article can achieve within the CIELAB color space.

[0130] The "optical transmission spectrum" described in this specification was obtained using an Agilent Cary 60 spectrophotometer with settings of a scanning range of 250 nm to 800 nm, a scan step of 2 nm, a signal averaging of 0.5 seconds, and a spot size of 2 mm. Then, using the obtained optical transmission data, coordinates were plotted in the CIELAB color space as described in "Billmeyer and Saltzman's Principles of Color Technology" (3rd Edition) by R.S. Berns, John Wiley & Sons, New York (2000).

[0131] As used herein, the term "projected color gamut" refers to a line, surface, solid, or overlapping solid occupied by a colored glass article within a three-dimensional CIELAB color space, and represents a color palette achievable within the CIELAB color space based on the concentration of the (one or more) colorants present in the colored glass article. The projected color gamut illustrated herein was created using the Gnuplot version 5.4 of the graphing routine. Specifically, using Gnuplot, the CIELAB color coordinates of the transmitted color under the conditions of the CIE 1976 10° field of view standard observer under F2 illumination were projected and displayed. The transmittance spectrum through a flat glass plate is given by the following equation.

[0132] [Number]

[0133] In the formula, R is the Fresnel reflection intensity coefficient of the glass, N i is the number density of each dopant, σ i is the absorption cross section of each dopant, λ is the wavelength of light, and t is the thickness of the glass. The color coordinates were calculated from the transmittance spectrum through a 1.5 mm thick colored glass article. For multiple colorant formulations, the dopant concentration (N i ) was varied from 0 to the maximum value, and the values of the above transmittance formula were obtained. As described herein, for the maximum value when obtaining such a projected color gamut, Cr 2 O 3 was set to 2 mol%, NiO to 4 mol%, CuO to 20 mol%, and Co 3 O 4 was set to 2 mol%.

[0134] As is well known in the art, the dielectric constant of a colored glass article can be measured at a frequency of 10 GHz using a split post dielectric resonator (SPDR). The measurement of the dielectric constant was performed on a colored glass article sample having a length of 3 inches (76.2 mm), a width of 3 inches (76.2 mm), and a thickness of less than 0.9 mm.

[0135] Also, as is well known in the art, the dielectric constant of a colored glass article can also be measured over a frequency range of 10 GHz to 60 GHz using a Fabry-Perot open resonator configured with concave-concave mirrors. In an open resonator, the dielectric constant can be measured at various frequencies by adjusting the distance between the mirrors. The measurement of the dielectric constant can be performed on a colored glass article sample having a length of 120 mm, a width of 120 mm, and a thickness of 2 mm or less. Although not wishing to be bound by theory, the dielectric constant of the colored glass article measured at 10 GHz is considered to approximate the dielectric constant at each frequency in the range of 10 GHz to 60 GHz.

[0136] The dielectric constant Dk of a colored glass article can be calculated according to the following formula: Dk = 3.802946 + 0.01747 * B 2 O 3 (mol%) + 0.058769 * Al 2 O 3 (mol%) + 0.080876 * Li 2 O (mol%) + 0.148433 * Na 2 O (mol%) + 0.153264 * K 2 O (mol%) + 0.045179 * MgO (mol%) + 0.080113 * CaO (mol%)

[0137] Conventionally, a colorant has been added to an aluminosilicate glass composition to realize a glass article having a desired color. However, in the case of such glass articles, desired mechanical or electrical properties suitable for some end-user applications may not be obtained. For example, glass used for the housing of consumer electronic devices may require robust mechanical properties to withstand daily harsh use and dielectric properties that enable wireless signal reception of the device.

[0138] Furthermore, it is desirable for the colored glass article to have mechanical and dielectric properties suitable for use in combination with consumer electronic devices, and at the same time, it may also be desirable to provide similar colored glass articles in a color range covering various colors. However, simply adding a colorant to an aluminosilicate glass composition may not be able to develop the desired color. For example, among colorants, there are those with a relatively low evaporation temperature, which evaporate during manufacturing and disperse outside the glass. And when the amount of the remaining colorant becomes relatively small, the achievable color gamut is limited.

[0139] This specification discloses a glass composition having excellent ion exchange performance and a colored glass article produced from the glass composition. This colored glass article has dielectric properties such as a dielectric constant, which is suitable for use as a housing of consumer electronic devices such as smartphones, tablet terminals, and computers. By using various colorants and compounded colorants as raw materials, the achievable color gamut in the obtained colored glass article can be expanded.

[0140] The glass composition and the colored glass article described in this specification (sometimes referred to as an aluminoborosilicate glass composition and a colored glass article) contain SiO 2 , Al 2 O 3 , and B 2 O 3 . Also, in addition to SiO 2 , Al 2 O 3 , and B 2 O 3 , the glass composition and the colored glass article described in this specification further contain one or more colorants as a colorant package in order to impart a desired color to the resulting colored glass article. Also, the glass composition and the colored glass article described in this specification contain Li 2 O and Na 2 to make the colored glass article ion-exchangeable.It further contains alkali oxides such as O. Also, in a plurality of embodiments, the glass compositions and the colored glass articles described herein may further contain other components for increasing the residual rate of the colorant and producing a colored glass article having a desired color. In a plurality of embodiments, in the glass compositions and the colored glass articles obtained therefrom described herein, R 2 O and Al 2 O 3 difference (i.e., R 2 O (mol%) - Al 2 O 3 (mol%)) can be adjusted to develop a desired observed color (e.g., pink, purple, red, orange, or blue). Also, in a plurality of embodiments, the viscosity of the glass composition can be adjusted to prevent devitrification of the glass composition.

[0141] SiO 2 is a main glass-forming substance in the glass compositions described herein and has a function of stabilizing the network structure of the colored glass article. To enhance the chemical durability of the glass composition (particularly, the resistance of the glass composition to deterioration due to exposure to acidic solutions, basic solutions, and water), the concentration of SiO 2 in the glass composition and the colored glass article obtained therefrom needs to be at a sufficiently high concentration (e.g., 40 mol% or more). However, since pure SiO 2 glass or high SiO 2 glass has too high a melting point to be preferable, the amount of SiO 2 can be suppressed (e.g., up to 80 mol% or less) to control the melting point of the glass composition. Therefore, by suppressing the concentration of SiO 2 it is possible to contribute to the improvement of the meltability and formability of the obtained colored glass article.

[0142] In a plurality of embodiments, the glass compositions and the colored glass articles obtained therefrom contain SiO 2 of 40 mol% or more and 80 mol% or less, or further or SiO 2can include. Also, in multiple embodiments, the glass composition and the colored glass article obtained therefrom have 45 mol% or more and 67 mol% or less of SiO 2 , further or 53 mol% or more and 67 mol% or less of SiO 2 can include. In multiple embodiments, the concentration of SiO 2 in the glass composition and the colored glass article obtained therefrom can be 40 mol% or more, 45 mol% or more, 50 mol% or more, 52 mol% or more, 53 mol% or more, 54 mol% or more, 55 mol% or more, 56 mol% or more, 57 mol% or more, 58 mol% or more, further or 60 mol% or more. In multiple embodiments, the concentration of SiO 2 in the glass composition and the colored glass article obtained therefrom can be 80 mol% or less, 75 mol% or less, 73 mol% or less, 71 mol% or less, 70 mol% or less, 68 mol% or less, 67 mol% or less, 66 mol% or less, 65 mol% or less, 64 mol% or less, 63 mol% or less, 62 mol% or less, 61 mol% or less, 60 mol% or less, further or 59 mol% or less. In multiple embodiments, the SiO 2The concentration is 40 mol% or more and 70 mol% or less, 40 mol% or more and 67 mol% or less, 40 mol% or more and 65 mol% or less, 40 mol% or more and 63 mol% or less, 40 mol% or more and 62 mol% or less, 40 mol% or more and 61 mol% or less, 40 mol% or more and 60 mol% or less, 45 mol% or more and 70 mol% or less, 45 mol% or more and 67 mol% or less, 45 mol% or more and 65 mol% or less, 45 mol% or more and 63 mol% or less, 45 mol% or more and 62 mol% or less, 45 mol% or more and 61 mol% or less, 45 mol% or more and 60 mol% or less, 50 mol% or more and 70 mol% or less, 50 mol% or more and 67 mol% or less, 50 mol% or more and 65 mol% or less, 50 mol% or more and 63 mol% or less, 50 mol% or more and 62 mol% or less, 50 mol% or more and 61 mol% or less, 50 mol% or more and 60 mol% or less, 50 mol% or more and 59 mol% or less, 53 mol% or more and 70 mol% or less, 53 mol% or more and 67 mol% or less, 53 mol% or more and 65 mol% or less, 53 mol% or more and 63 mol% or less, 53 mol% or more and 62 mol% or less, 53 mol% or more and 61 mol% or less, 53 mol% or more and 60 mol% or less, 53 mol% or more and 59 mol% or less, 55 mol% or more and 70 mol% or less, 55 mol% or more and 67 mol% or less, 55 mol% or more and 65 mol% or less, 55 mol% or more and 63 mol% or less, 55 mol% or more and 62 mol% or less, 55 mol% or more and 61 mol% or less, 55 mol% or more and 60 mol% or less, 55 mol% or more and 59 mol% or less, 56 mol% or more and 70 mol% or less, 56 mol% or more and 67 mol% or less, 56 mol% or more and 65 mol% or less, 56 mol% or more and 63 mol% or less, 56 mol% or more and 62 mol% or less, 56 mol% or more and 61 mol% or less, 56 mol% or more and 60 mol% or less, 56 mol% or more and 59 mol% or less, 57 mol% or more and 70 mol% or less, 57 mol% or more and 67 mol% or less, 57 mol% or more and 65 mol% or less, 57 mol% or more and 63 mol% or less, 57 mol% or more and 62 mol% or less, 57 mol% or more and 61 mol% or less, 57 mol% or more and 60 mol% or less, or further 57 mol% or more and 59 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, SiO in the glass composition and the colored glass article obtained therefrom 2The concentration is 50 mol% or more and 80 mol% or less, 50 mol% or more and 75 mol% or less, 50 mol% or more and 73 mol% or less, 50 mol% or more and 71 mol% or less, 50 mol% or more and 69 mol% or less, 52 mol% or more and 80 mol% or less, 52 mol% or more and 75 mol% or less, 52 mol% or more and 73 mol% or less, 52 mol% or more and 71 mol% or less, 52 mol% or more and 69 mol% or less, 54 mol% or more and 80 mol% or less, 54 mol% or more and 75 mol% or less, 54 mol% or more and 73 mol% or less, 54 mol% or more and 71 mol% or less, 54 mol% or more and 69 mol% or less, 56 mol% or more and 80 mol% or less, 56 mol% or more and 75 mol% or less, 56 mol% or more and 73 mol% or less, 56 mol% or more and 71 mol% or less, 56 mol% or more and 69 mol% or less, 58 mol% or more and 80 mol% or less, 58 mol% or more and 75 mol% or less, 58 mol% or more and 73 mol% or less, 58 mol% or more and 71 mol% or less, 58 mol% or more and 69 mol% or less, 50 mol% or more and 80 mol% or less, 60 mol% or more and 75 mol% or less, 60 mol% or more and 73 mol% or less, 60 mol% or more and 71 mol% or less, or further 60 mol% or more and 69 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, SiO in the glass composition and the colored glass article obtained therefrom 2 The concentration is 52 mol% or more and 70 mol% or less, 52 mol% or more and 68 mol% or less, 52 mol% or more and 66 mol% or less, 52 mol% or more and 65 mol% or less, 52 mol% or more and 64 mol% or less, 53 mol% or more and 70 mol% or less, 53 mol% or more and 68 mol% or less, 53 mol% or more and 66 mol% or less, 53 mol% or more and 65 mol% or less, or 53 mol% or more and 64 mol% or less, 54 mol% or more and 70 mol% or less, 54 mol% or more and 68 mol% or less, 54 mol% or more and 66 mol% or less, 54 mol% or more and 65 mol% or less, or 54 mol% or more and 64 mol% or less, or can be any and all sub-ranges formed from the endpoints of these ranges.

[0143] SiO 2 Similarly, Al 2 O 3 can also stabilize the glass network, and further can improve the mechanical properties and chemical durability of the glass composition and the colored glass article obtained therefrom. Also, Al2 O 3 The viscosity of the glass composition can also be controlled by adjusting the amount of Al 2 O 3 so that the resulting glass article has a desired fracture toughness (e.g., 0.7 MPa·m 1 / 2 or more). However, if the amount of Al 2 O 3 is too high (e.g., more than 25 mol%), the viscosity of the glass melt may increase, and the formability of the colored glass article may decrease. In a plurality of embodiments, if the amount of Al 2 O 3 is too high, the solubility of one or more colorants in the colorant set in the glass melt may decrease, and an undesirable crystal phase may be formed in the glass. For example, but not limited to, when the colorant set contains Cr 2 O 3 , as the Al 2 O 3 concentration increases (e.g., reaches a concentration of 17.5 mol% or more), the solubility of Cr 2 O 3 in the glass melt decreases, and precipitation of an undesirable crystal phase may occur. Without wishing to be bound by theory, it is presumed that similar behavior may occur with colorants other than Cr 2 O 3 .

[0144] Therefore, in a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain 7 mol% or more and 25 mol% or less of Al 2 O 3 , 7 mol% or more and 20 mol% or less of Al 2 O 3 , or further 8 mol% or more and 20 mol% or less of Al 2 O 3 . In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain 10 mol% or more and 20 mol% or less of Al 2 O 3 , 10 mol% or more and 17.5 mol% or less of Al 2 O 3, further or Al in an amount of 12 mol% or more and 17.25 mol% or less 2 O 3 can be included. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain Al in an amount of 11 mol% or more and 19 mol% or less 2 O 3 , or Al in an amount of 14 mol% or more and 17 mol% or less 2 O 3 can be included. In a plurality of embodiments, the concentration of Al 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 7 mol% or more, 8 mol% or more, 9 mol% or more, 10 mol% or more, 11 mol% or more, 12 mol% or more, 12.5 mol% or more, 13 mol% or more, 13.5 mol% or more, 14 mol% or more, 14.5 mol% or more, 15 mol% or more, 15.5 mol% or more, further or 16 mol% or more. In a plurality of embodiments, the concentration of Al 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 25 mol% or less, 23 mol% or less, 20 mol% or less, 19 mol% or less, 18 mol% or less, 17.5 mol% or less, 17.25 mol% or less, 17 mol% or less, 16.75 mol% or less, further or 16 mol% or less. In a plurality of embodiments, the concentration of Al 2 O 3The concentration is 8 mol% or more and 20 mol% or less, 8 mol% or more and 18 mol% or less, 8 mol% or more and 17.5 mol% or less, 8 mol% or more and 17 mol% or less, 10 mol% or more and 20 mol% or less, 10 mol% or more and 18 mol% or less, 10 mol% or more and 17.5 mol% or less, 10 mol% or more and 17 mol% or less, 12 mol% or more and 20 mol% or less, 12 mol% or more and 18 mol% or less, 12 mol% or more and 17.5 mol% or less, 12 mol% or more and 17 mol% or less, 12.5 mol% or more and 20 mol% or less, 12.5 mol% or more and 18 mol% or less, 12.5 mol% or more and 17.5 mol% or less, 12.5 mol% or more and 17 mol% or less, 13 mol% or more and 20 mol% or less, 13 mol% or more and 18 mol% or less, 13 mol% or more and 17.5 mol% or less, 13 mol% or more and 17 mol% or less, 13.5 mol% or more and 20 mol% or less, 13.5 mol% or more and 18 mol% or less, 13.5 mol% or more and 17.5 mol% or less, 13.5 mol% or more and 17 mol% or less, 14 mol% or more and 20 mol% or less, 14 mol% or more and 18 mol% or less, 14 mol% or more and 17.5 mol% or less, or further 14 mol% or more and 17 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, Al in the glass composition and the colored glass article obtained therefrom 2 O 3 The concentration is 7 mol% or more and 25 mol% or less, 7 mol% or more and 23 mol% or less, 7 mol% or more and 20 mol% or less, 7 mol% or more and 17 mol% or less, 9 mol% or more and 25 mol% or less, 9 mol% or more and 23 mol% or less, 9 mol% or more and 20 mol% or less, 9 mol% or more and 17 mol% or less, 11 mol% or more and 25 mol% or less, 11 mol% or more and 23 mol% or less, 11 mol% or more and 20 mol% or less, 11 mol% or more and 17 mol% or less, 13 mol% or more and 25 mol% or less, 13 mol% or more and 23 mol% or less, 13 mol% or more and 20 mol% or less, 13 mol% or more and 17 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, Al in the glass composition and the colored glass article obtained therefrom 2 O 3The concentration is 10 mol% or more and 17.5 mol% or less, 10 mol% or more and 17.25 mol% or less, 10 mol% or more and 17 mol% or less, 10 mol% or more and 16.75 mol% or less, 12 mol% or more and 17.5 mol% or less, 12 mol% or more and 17.25 mol% or less, 12 mol% or more and 17 mol% or less, 12 mol% or more and 16.75 mol% or less, 14 mol% or more and 17.5 mol% or less, 14 mol% or more and 17.25 mol% or less, 14 mol% or more and 17 mol% or less, 14 mol% or more and 16.75 mol% or less, 14.5 mol% or more and 17.5 mol% or less, 14.5 mol% or more and 17.25 mol% or less, 14.5 mol% or more and 17 mol% or less, 14.5 mol% or more and 16.75 mol% or less, 15 mol% or more and 17.5 mol% or less, 15 mol% or more and 17.25 mol% or less, 15 mol% or more and 17 mol% or less, 15 mol% or more and 16.75 mol% or less, 15.5 mol% or more and 17.5 mol% or less, 15.5 mol% or more and 17.25 mol% or less, 15.5 mol% or more and 17 mol% or less, 15.5 mol% or more and 16.75 mol% or less, 16 mol% or more and 17.5 mol% or less, 16 mol% or more and 17.25 mol% or less, 16 mol% or more and 17 mol% or less, or further 16 mol% or more and 16.75 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, Al in the glass composition and the colored glass article obtained therefrom 2 O 3The concentration is 10 mol% or more and 20 mol% or less, 10 mol% or more and 19 mol% or less, 10 mol% or more and 18 mol% or less, 10 mol% or more and 17 mol% or less, 10 mol% or more and 16 mol% or less, 11 mol% or more and 20 mol% or less, 11 mol% or more and 19 mol% or less, 11 mol% or more and 18 mol% or less, 11 mol% or more and 17 mol% or less, 11 mol% or more and 16 mol% or less, 12 mol% or more and 20 mol% or less, 12 mol% or more and 19 mol% or less, 12 mol% or more and 18 mol% or less, 12 mol% or more and 17 mol% or less, 12 mol% or more and 16 mol% or less, 13 mol% or more and 20 mol% or less, 13 mol% or more and 19 mol% or less, 13 mol% or more and 18 mol% or less, 13 mol% or more and 17 mol% or less, 13 mol% or more and 16 mol% or less, 14 mol% or more and 20 mol% or less, 14 mol% or more and 19 mol% or less, 14 mol% or more and 18 mol% or less, 14 mol% or more and 17 mol% or less, 14 mol% or more and 16 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0145] B 2 O 3 Thereby, since the melting point of the glass composition is lowered, the residual rate of a specific colorant (for example, but not limited to, Au, etc.) in the glass can be increased. Although not wishing to be bound by theory, it is presumed that similar behavior may occur with colorants other than Au. Also, B 2 O 3 can also improve the damage resistance of the obtained colored glass article. Furthermore, B 2 O 3 can also suppress the formation of non-bridging oxygen that may lower the fracture toughness by adding it. In order to lower the melting point of the glass composition, improve the formability, and increase the fracture toughness of the colored glass article, the concentration of B 2 O 3 needs to be at a sufficiently high concentration (for example, 1 mol% or more). However, if the concentration of B 2 O 3 is too high (for example, exceeding 15 mol%), the annealing point and strain point may decrease, stress relaxation may increase, and the strength of the colored glass article may comprehensively decrease.

[0146] In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain 1 mol% or more and 15 mol% or less of B 2 O 3 , 1 mol% or more and 10 mol% or less of B 2 O 3 , 3 mol% or more and 10 mol% or less of B 2 O 3 and 3.5 mol% or more and 9 mol% or less of B 2 O 3 can be included. In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain 2 mol% or more and 12 mol% or less of B 2 O 3 or further 2 mol% or more and 8 mol% or less of B 2 O 3 can be included. In multiple embodiments, the concentration of B 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 1 mol% or more, 2 mol% or more, 3 mol% or more, 3.5 mol% or more, 4 mol% or more, 4.5 mol% or more, 5 mol% or more or further 5.5 mol% or more. In multiple embodiments, the concentration of B 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 15 mol% or less, 12 mol% or less, 10 mol% or less, 9 mol% or less, 8 mol% or less, 7.5 mol% or less, 7 mol% or less, 6.5 mol% or less or further 6 mol% or less. In multiple embodiments, the concentration of B 2 O 3The concentration can be 1 mol% or more and 15 mol% or less, 1 mol% or more and 12 mol% or less, 1 mol% or more and 10 mol% or less, 1 mol% or more and 9 mol% or less, 1 mol% or more and 8 mol% or less, 1 mol% or more and 7.5 mol% or less, 1 mol% or more and 7 mol% or less, 1 mol% or more and 6.5 mol% or less, 1 mol% or more and 6 mol% or less, 2 mol% or more and 15 mol% or less, 2 mol% or more and 12 mol% or less, 2 mol% or more and 10 mol% or less, 2 mol% or more and 9 mol% or less, 2 mol% or more and 8 mol% or less, 2 mol% or more and 7.5 mol% or less, 2 mol% or more and 7 mol% or less, 2 mol% or more and 6.5 mol% or less, 2 mol% or more and 6 mol% or less, 3 mol% or more and 15 mol% or less, 3 mol% or more and 12 mol% or less, 3 mol% or more and 10 mol% or less, 3 mol% or more and 9 mol% or less, 3 mol% or more and 8 mol% or less, 3 mol% or more and 7.5 mol% or less, 3 mol% or more and 7 mol% or less, 3 mol% or more and 6.5 mol% or less, 3 mol% or more and 6 mol% or less, 3.5 mol% or more and 15 mol% or less, 3.5 mol% or more and 12 mol% or less, 3.5 mol% or more and 10 mol% or less, 3.5 mol% or more and 9 mol% or less, 3.5 mol% or more and 8 mol% or less, 3.5 mol% or more and 7.5 mol% or less, 3.5 mol% or more and 7 mol% or less, 3.5 mol% or more and 6.5 mol% or less, 3.5 mol% or more and 6 mol% or less, 4 mol% or more and 15 mol% or less, 4 mol% or more and 12 mol% or less, 4 mol% or more and 10 mol% or less, 4 mol% or more and 9 mol% or less, 4 mol% or more and 8 mol% or less, 4 mol% or more and 7.5 mol% or less, 4 mol% or more and 7 mol% or less, 4 mol% or more and 6.5 mol% or less, 4 mol% or more and 6 mol% or less, 4.5 mol% or more and 10 mol% or less, 4.5 mol% or more and 9 mol% or less, 4.5 mol% or more and 8 mol% or less, 4.5 mol% or more and 7.5 mol% or less, 4.5 mol% or more and 7 mol% or less, 4.5 mol% or more and 6.5 mol% or less, 5 mol% or more and 10 mol% or less, 5 mol% or more and 9 mol% or less, 5 mol% or more and 8 mol% or less, 5 mol% or more and 7.5 mol% or less, 5 mol% or more and 7 mol% or less, 5 mol% or more and 6.5 mol% or less, 5.5 mol% or more and 10 mol% or less, 5.5 mol% or more and 9 mol% or less, 5.5 mol% or more and 8 mol% or less, 5.5 mol% or more and 7.5 mol% or less, 5.5 mol% or more and 7 mol% or less, or 5.5 mol% or more and 6.5 mol% or less, or it can be within any and all sub-ranges formed from each endpoint of these ranges.

[0147] As described above, the glass composition and the colored glass article obtained therefrom may contain alkali oxides such as Li 2 O, Na 2 O, and K 2 O in order to make the colored glass article ion-exchangeable.

[0148] Li 2 O contributes to the ion-exchangeability of the colored glass article, lowers the softening point of the glass composition, and improves the formability of the colored glass article. By adding Li 2 O, the introduction of Na + cations and K + cations into the glass during ion exchange is promoted, enabling the strengthening of the glass. At the same time, a relatively large surface compressive stress and a relatively large compressive depth are likely to be generated, thus improving the mechanical properties of the obtained colored glass article. Furthermore, since Li 2 O lowers the melting point of the glass composition, the residual rate of a specific colorant (for example, but not limited to, Au, etc.) in the glass can also be increased. Although not wishing to be bound by theory, it is presumed that similar behavior may occur with colorants other than Au. In order to lower the melting point of the glass composition and make the maximum central tensile stress after ion exchange a desired value (for example, 40 MPa or more), it is necessary to set the concentration of Li 2 O in the glass composition and the colored glass article obtained therefrom to a sufficiently high concentration (for example, 1 mol% or more). However, if the amount of Li 2 O is too large (for example, exceeding 20 mol%), the liquidus temperature will rise, and the manufacturability of the colored glass article may decrease.

[0149] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may contain Li 2 O of 1 mol% or more and 20 mol% or less, or further may contain Li 2 O of 1 mol% or more and 18 mol% or less. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may contain Li 2 O of 3 mol% or more and 18 mol% or less, and Li 2O, Li in an amount of 8.8 mol% or more and 14 mol% or less 2 O, or further Li in an amount of 9 mol% or more and 13.5 mol% or less 2 O can be included. In a plurality of embodiments, Li in the glass composition and the colored glass article obtained therefrom 2 The concentration of O can be 1 mol% or more, 3 mol% or more, 5 mol% or more, 7 mol% or more, 7.5 mol% or more, 8 mol% or more, 8.5 mol% or more, 8.8 mol% or more, 9 mol% or more, 9.2 mol% or more, 9.4 mol% or more, 9.6 mol% or more, 9.8 mol% or more, 10 mol% or more, 11 mol% or more, 11.5 mol% or more, or further 12 mol% or more. In a plurality of embodiments, Li in the glass composition and the colored glass article obtained therefrom 2 The concentration of O can be 20 mol% or less, 18 mol% or less, 17 mol% or less, 16 mol% or less, 15 mol% or less, 14 mol% or less, 13.5 mol% or less, 13 mol% or less, 12.5 mol% or less, 12 mol% or less, 11.5 mol% or less, or further 11 mol% or less. In a plurality of embodiments, Li in the glass composition and the colored glass article obtained therefrom 2The concentration of O is 1 mol% or more and 20 mol% or less, 1 mol% or more and 18 mol% or less, 1 mol% or more and 16 mol% or less, 1 mol% or more and 14 mol% or less, 1 mol% or more and 12.5 mol% or less, 1 mol% or more and 12 mol% or less, 1 mol% or more and 11.5 mol% or less, 1 mol% or more and 11 mol% or less, 3 mol% or more and 20 mol% or less, 3 mol% or more and 18 mol% or less, 3 mol% or more and 16 mol% or less, 3 mol% or more and 14 mol% or less, 3 mol% or more and 12.5 mol% or less, 3 mol% or more and 12 mol% or less, 3 mol% or more and 11.5 mol% or less, 3 mol% or more and 11 mol% or less, 5 mol% or more and 20 mol% or less, 5 mol% or more and 18 mol% or less, 5 mol% or more and 16 mol% or less, 5 mol% or more and 14 mol% or less, 5 mol% or more and 12.5 mol% or less, 5 mol% or more and 12 mol% or less, 5 mol% or more and 11.5 mol% or less, 5 mol% or more and 11 mol% or less, 7 mol% or more and 20 mol% or less, 7 mol% or more and 18 mol% or less, 7 mol% or more and 16 mol% or less, 7 mol% or more and 15 mol% or less, 7 mol% or more and 14 mol% or less, 7 mol% or more and 13 mol% or less, 7 mol% or more and 12.5 mol% or less, 7 mol% or more and 12 mol% or less, 7 mol% or more and 11.5 mol% or less, 7 mol% or more and 11 mol% or less, 7.5 mol% or more and 20 mol% or less, 7.5 mol% or more and 18 mol% or less, 7.5 mol% or more and 16 mol% or less, 7.5 mol% or more and 14 mol% or less, 7.5 mol% or more and 12.5 mol% or less, 7.5 mol% or more and 12 mol% or less, 7.5 mol% or more and 11.5 mol% or less, 7.5 mol% or more and 11 mol% or less, 8 mol% or more and 20 mol% or less, 8 mol% or more and 18 mol% or less, 8 mol% or more and 16 mol% or less, 8 mol% or more and 15 mol% or less, 8 mol% or more and 14 mol% or less, 8 mol% or more and 13 mol% or less, 8 mol% or more and 12.5 mol% or less, 8 mol% or more and 12 mol% or less, 8 mol% or more and 11.5 mol% or less, 8 mol% or more and 11 mol% or less, 8.5 mol% or more and 20 mol% or less, 8.5 mol% or more and 18 mol% or less, 8.5 mol% or more and 16 mol% or less, 8.5 mol% or more and 14 mol% or less, 8.5 mol% or more and 12.5 mol% or less, 8.5 mol% or more and 12 mol% or less, 8.5 mol% or more and 11.5 mol% or less, 8.5 mol% or more and 11 mol% or less, 9 mol% or more and 20 mol% or less, 9 mol% or more and 18 mol% or less, 9 mol% or more and 16 mol% or less, 9 mol% or more and 15 mol% or less, 9 mol% or more and 14 mol% or less, 9 mol% or more and 13 mol% or less, 9 mol% or more and 12.5 mol% or less, 9 mol% or more and 12 mol% or less, 9 mol% or more and 11.5 mol% or less, or further 9 mol% or more and 11 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, Li in the glass composition and the colored glass article obtained therefrom. 2 The concentration of O is 8.8 mol% or more and 14 mol% or less, 8.8 mol% or more and 13.5 mol% or less, 8.8 mol% or more and 13 mol% or less, 8.8 mol% or more and 12.5 mol% or less, 8.8 mol% or more and 12 mol% or less, 8.8 mol% or more and 11.5 mol% or less, 9 mol% or more and 14 mol% or less, 9 mol% or more and 13.5 mol% or less, 9 mol% or more and 13 mol% or less, 9 mol% or more and 12.5 mol% or less, 9 mol% or more and 12 mol% or less, 9 mol% or more and 11.5 mol% or less, 9.2 mol% or more and 14 mol% or less, 9.2 mol% or more and 13.5 mol% or less, 9.2 mol% or more and 13 mol% or less, 9.2 mol% or more and 12.5 mol% or less, 9.2 mol% or more and 12 mol% or less, 9.2 mol% or more and 11.5 mol% or less, 9.4 mol% or more and 14 mol% or less, 9.4 mol% or more and 13.5 mol% or less, 9.4 mol% or more and 13 mol% or less, 9.4 mol% or more and 12.5 mol% or less, 9.4 mol% or more and 12 mol% or less, 9.4 mol% or more and 11.5 mol% or less, 9.6 mol% or more and 14 mol% or less, 9.6 mol% or more and 13.5 mol% or less, 9.6 mol% or more and 13 mol% or less, 9.6 mol% or more and 12.5 mol% or less, 9.6 mol% or more and 12 mol% or less, 9.6 mol% or more and 11.5 mol% or less, 9.8 mol% or more and 14 mol% or less, 9.8 mol% or more and 13.5 mol% or less, 9.8 mol% or more and 13 mol% or less, 9.8 mol% or more and 12.5 mol% or less, 9.8 mol% or more and 12 mol% or less, 9.8 mol% or more and 11.5 mol% or less, 10 mol% or more and 14 mol% or less, 10 mol% or more and 13.5 mol% or less, 10 mol% or more and 13 mol% or less, 10 mol% or more and 12.5 mol% or less, 10 mol% or more and 12 mol% or less, or further 10 mol% or more and 11.5 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, Li in the glass composition and the colored glass article obtained therefrom 2The concentration of O is 10 mol% or more and 17 mol% or less, 10 mol% or more and 16 mol% or less, 10 mol% or more and 15 mol% or less, 10 mol% or more and 14 mol% or less, 10 mol% or more and 13 mol% or less, 10 mol% or more and 12 mol% or less, 11 mol% or more and 17 mol% or less, 11 mol% or more and 16 mol% or less, 11 mol% or more and 15 mol% or less, 11 mol% or more and 14 mol% or less, 11 mol% or more and 13 mol% or less, 11 mol% or more and 12 mol% or less, 11.1 mol% or more and 17 mol% or less, 11.1 mol% or more and 16 mol% or less, 11.1 mol% or more and 15 mol% or less, 11.1 mol% or more and 14 mol% or less, 11.1 mol% or more and 13 mol% or less, 11.1 mol% or more and 12 mol% or less, 11.5 mol% or more and 17 mol% or less, 11.5 mol% or more and 16 mol% or less, 11.5 mol% or more and 15 mol% or less, 11.5 mol% or more and 14 mol% or less, 11.5 mol% or more and 13 mol% or less, 11.5 mol% or more and 12 mol% or less, 12 mol% or more and 17 mol% or less, 12 mol% or more and 16 mol% or less, 12 mol% or more and 15 mol% or less, 12 mol% or more and 14 mol% or less, 12 mol% or more and 13 mol% or less, 13 mol% or more and 17 mol% or less, 13 mol% or more and 16 mol% or less, 13 mol% or more and 15 mol% or less, 13 mol% or more and 14 mol% or less, or can be within any and all partial ranges formed from each endpoint of these ranges.

[0150] Na 2 O contributes to shortening the ion exchange treatment time by improving the diffusibility of alkali ions in the glass and realizing a desired surface compressive stress (for example, 300 MPa or more). Also, Na 2 By adding O, the introduction of K + cations into the glass is promoted during ion exchange, so strengthening of the resulting colored glass article and improvement of mechanical properties can also be expected. Furthermore, Na 2 also improves the formability of the colored glass article by O. Also, Na 2 lowers the melting point of the glass composition by O, so the residual rate of a specific colorant (for example, Au, etc.) in the glass can also be increased. Although not wishing to be bound by theory, it is presumed that the same behavior may occur with colorants other than Au. However, Na 2If the addition amount of O is too large, the melting point may drop too much. In a plurality of embodiments, Li present in the glass composition and the colored glass article obtained therefrom 2 The concentration of O can be higher than the concentration of Na 2 O present in the glass composition and the colored glass article obtained therefrom.

[0151] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain more than 0 mol% or 0.01 mol% or more and 15 mol% or less of Na 2 O, 0.5 mol% or more and 15 mol% or less of Na 2 O, or further 1 mol% or more and 15 mol% or less of Na 2 O. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 1 mol% or more and 12 mol% or less of Na 2 O, or further 2 mol% or more and 10 mol% or less of Na 2 O. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 0.01 mol% or more and 4 mol% or less of Na 2 O. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 1.5 mol% or more and 8 mol% or less of Na 2 O, or further 2 mol% or more and 7.5 mol% or less of Na 2 O. In a plurality of embodiments, the concentration of Na 2 O in the glass composition and the colored glass article obtained therefrom can be more than 0 mol%, 0.01 mol% or more, 0.5 mol% or more, 1 mol% or more, 1.5 mol% or more, 2 mol% or more, 2.5 mol% or more, 3 mol% or more, 3.5 mol% or more, 4 mol% or more, or further 4.5 mol% or more. In a plurality of embodiments, the concentration of Na 2The concentration of O can be 15 mol% or less, 12 mol% or less, 10 mol% or less, 9 mol% or less, 8.5 mol% or less, 8 mol% or less, 7.5 mol% or less, 7 mol% or less, 6.5 mol% or less, 6 mol% or less, 5.5 mol% or less, 5 mol% or less, 4.5 mol% or less, or further 4 mol% or less. In a plurality of embodiments, Na in the glass composition and the colored glass article obtained therefrom 2The concentration of O is more than 0 mol% and 15 mol% or less, more than 0 mol% and 12 mol% or less, more than 0 mol% and 10 mol% or less, more than 0 mol% and 8 mol% or less, more than 0 mol% and 6 mol% or less, more than 0 mol% and 5.5 mol% or less, more than 0 mol% and 5 mol% or less, more than 0 mol% and 4.5 mol% or less, more than 0 mol% and 4 mol% or less, 0.01 mol% or more and 15 mol% or less, 0.01 mol% or more and 12 mol% or less, 0.01 mol% or more and 10 mol% or less, 0.01 mol% or more and 8 mol% or less, 0.01 mol% or more and 6 mol% or less, 0.01 mol% or more and 5.5 mol% or less, 0.01 mol% or more and 5 mol% or less, 0.01 mol% or more and 4.5 mol% or less, 0.01 mol% or more and 4 mol% or less, 0.5 mol% or more and 15 mol% or less, 0.5 mol% or more and 12 mol% or less, 0.5 mol% or more and 10 mol% or less, 0.5 mol% or more and 8 mol% or less, 0.5 mol% or more and 6 mol% or less, 1 mol% or more and 15 mol% or less, 1 mol% or more and 12 mol% or less, 1 mol% or more and 10 mol% or less, 1 mol% or more and 9 mol% or less, 1 mol% or more and 8 mol% or less, 1 mol% or more and 7.5 mol% or less, 1 mol% or more and 7 mol% or less, 1 mol% or more and 6.5 mol% or less, 1 mol% or more and 6 mol% or less, 1 mol% or more and 5.5 mol% or less, 1.5 mol% or more and 15 mol% or less, 1.5 mol% or more and 12 mol% or less, 1.5 mol% or more and 10 mol% or less, 1.5 mol% or more and 9 mol% or less, 1.5 mol% or more and 8 mol% or less, 1.5 mol% or more and 7.5 mol% or less, 1.5 mol% or more and 7 mol% or less, 1.5 mol% or more and 6.5 mol% or less, 1.5 mol% or more and 6 mol% or less, 1.5 mol% or more and 5.5 mol% or less, 2 mol% or more and 15 mol% or less, 2 mol% or more and 12 mol% or less, 2 mol% or more and 10 mol% or less, 2 mol% or more and 9 mol% or less, 2 mol% or more and 8 mol% or less, 2 mol% or more and 7.5 mol% or less, 2 mol% or more and 7 mol% or less, 2 mol% or more and 6.5 mol% or less, 2 mol% or more and 6 mol% or less, 2 mol% or more and 5.5 mol% or less, 2.5 mol% or more and 15 mol% or less, 2.5 mol% or more and 12 mol% or less, 2.5 mol% or more and 10 mol% or less, 2.5 mol% or more and 9 mol% or less, 2.5 mol% or more and 8 mol% or less, 2.5 mol% or more and 7.5 mol% or less, 2.5 mol% or more and 7 mol% or less, 2.5 mol% or more and 6.5 mol% or less, 2.5 mol% or more and 6 mol% or less, 2.5 mol% or more and 5.5 mol% or less, 3 mol% or more and 15 mol% or less, 3 mol% or more and 12 mol% or less, 3 mol% or more and 10 mol% or less, 3 mol% or more and 9 mol% or less, 3 mol% or more and 8.5 mol% or less, 3 mol% or more and 8 mol% or less, 3 mol% or more and 7.5 mol% or less, 3 mol% or more and 7 mol% or less, 3 mol% or more and 6.5 mol% or less, 3 mol% or more and 6 mol% or less, 3 mol% or more and 5.5 mol% or less, 3.5 mol% or more and 15 mol% or less, 3.5 mol% or more and 12 mol% or less, 3.5 mol% or more and 10 mol% or less, 3.5 mol% or more and 9 mol% or less, 3.5 mol% or more and 8 mol% or less, 3.5 mol% or more and 7.5 mol% or less, 3.5 mol% or more and 7 mol% or less, 3.5 mol% or more and 6.5 mol% or less, 3.5 mol% or more and 6 mol% or less, 3.5 mol% or more and 5.5 mol% or less, 4 mol% or more and 15 mol% or less, 4 mol% or more and 12 mol% or less, 4 mol% or more and 10 mol% or less, 4 mol% or more and 9 mol% or less, 4 mol% or more and 8 mol% or less, 4 mol% or more and 7.5 mol% or less, 4 mol% or more and 7 mol% or less, 4 mol% or more and 6.5 mol% or less, 4 mol% or more and 6 mol% or less, 4 mol% or more and 5.5 mol% or less, 4.5 mol% or more and 15 mol% or less, 4.5 mol% or more and 12 mol% or less, 4.5 mol% or more and 10 mol% or less, 4.5 mol% or more and 8 mol% or less, 4.5 mol% or more and 7.5 mol% or less, 4.5 mol% or more and 7 mol% or less, 4.5 mol% or more and 6.5 mol% or less, 4.5 mol% or more and 6 mol% or less, or further or 4.5 mol% or more and 5.5 mol% or less, or can be within any and all sub-ranges formed from each end point of these ranges.

[0152] Li in the glass composition and the colored glass article obtained therefrom 2 O + Na 2 The concentration of O determines how the glass composition and the colored glass article can be strengthened in an ion exchange process. Generally, the ion exchange process is a process of strengthening glass by replacing alkali ions in the glass with larger alkali ions. For example, in the case of glass containing Li 2 O and / or Na 2 O, by ion exchange, Li + ions or Na + ions are replaced with potassium ions (K +The glass can be strengthened by replacing it with 2 LiO + Na 2 O is directly related to the content of Li 2 O + Na 2 O. If the content of Li

[0153] O + Na 2 O is too low (for example, less than about 8 mol%), the resulting colored glass article may not be sufficiently strengthened by the ion exchange process. 2 In a plurality of embodiments, the concentration of Li 2 O + Na 2 O in the glass composition and the resulting colored glass article can be 8 mol% or more, for example, 10 mol% or more and 19 mol% or less. In a plurality of embodiments, the concentration of Li 2 O + Na 2 O in the glass composition and the resulting colored glass article can be 9 mol% or more, 10 mol% or more, 12 mol% or more, 14 mol% or more, 16 mol% or more, or more than 16 mol%. In a plurality of embodiments, the concentration of Li 2 O + Na 2 O in the glass composition and the colored glass article can be 20 mol% or less, 18 mol% or less, 16 mol% or less, 14 mol% or less, 12 mol% or less, 10 mol% or less, or less than 10 mol%. In a plurality of embodiments, the concentration of Li

[0154] O in the glass composition and the colored glass article can be 8 mol% or more and 20 mol% or less, 9 mol% or more and 19 mol% or less, 10 mol% or more and 18 mol% or less, 11 mol% or more and 17 mol% or less, 12 mol% or more and 16 mol% or less, 13 mol% or more and 15 mol% or less, 8 mol% or more and 14 mol% or less, or within any and all sub-ranges formed from the endpoints of these ranges. 2 By including K 2If the addition amount of O is too large, there is a risk that the surface compressive stress and melting point may decrease too much. Therefore, in a plurality of embodiments, K added to the glass composition 2 The amount of O can be limited.

[0155] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may optionally contain 0 mol% or more and 3 mol% or less of K 2 O, 0 mol% or more and 1 mol% or less of K 2 O, 0.01 mol% or more and 1 mol% or less of K 2 O, or further 0.1 mol% or more and 1 mol% or less of K 2 O. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may optionally contain more than 0.1 mol% and 0.5 mol% or less of K 2 O. In a plurality of embodiments, the concentration of K in the glass composition and the colored glass article obtained therefrom 2 O can be 0 mol% or more, 0.01 mol% or more, 0.1 mol% or more, 0.2 mol% or more, 0.25 mol% or more, 0.4 mol% or more, or further 0.5 mol% or more. In a plurality of embodiments, the concentration of K in the glass composition and the colored glass article obtained therefrom 2 O can be 3 mol% or less, 2.5 mol% or less, 2 mol% or less, 1.5 mol% or less, 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, or further 0.25 mol% or less. In a plurality of embodiments, the concentration of K in the glass composition and the colored glass article obtained therefrom 2The concentration of O is 0 mol% or more and 3 mol% or less, 0 mol% or more and 2.5 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1.5 mol% or less, 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.75 mol% or less, 0 mol% or more and 0.7 mol% or less, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.25 mol% or less, 0.01 mol% or more and 3 mol% or less, 0.01 mol% or more and 2.5 mol% or less, 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1.5 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.75 mol% or less, 0.01 mol% or more and 0.7 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2.5 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.7 mol% or less, 0.1 mol% or more and 0.5 mol% or less, 0.2 mol% or more and 3 mol% or less, 0.2 mol% or more and 2.5 mol% or less, 0.2 mol% or more and 2 mol% or less, 0.2 mol% or more and 1.5 mol% or less, 0.2 mol% or more and 1 mol% or less, 0.2 mol% or more and 0.75 mol% or less, 0.2 mol% or more and 0.7 mol% or less, 0.2 mol% or more and 0.5 mol% or less, 0.25 mol% or more and 3 mol% or less, 0.25 mol% or more and 2.5 mol% or less, 0.25 mol% or more and 2 mol% or less, 0.25 mol% or more and 1.5 mol% or less, 0.25 mol% or more and 1 mol% or less, 0.25 mol% or more and 0.75 mol% or less, 0.25 mol% or more and 0.7 mol% or less, 0.25 mol% or more and 0.5 mol% or less, 0.3 mol% or more and 3 mol% or less, 0.3 mol% or more and 2.5 mol% or less, 0.3 mol% or more and 2 mol% or less, 0.3 mol% or more and 1.5 mol% or less, 0.3 mol% or more and 1 mol% or less, 0.3 mol% or more and 0.75 mol% or less, 0.3 mol% or more and 0.7 mol% or less, 0.3 mol% or more and 0.5 mol% or less, 0.4 mol% or more and 3 mol% or less, 0.4 mol% or more and 2.5 mol% or less, 0.4 mol% or more and 2 mol% or less, 0.4 mol% or more and 1.5 mol% or less, 0.4 mol% or more and 1 mol% or less, 0.4 mol% or more and 0.75 mol% or less, 0.4 mol% or more and 0.7 mol% or less, or further 0.4 mol% or more and 0.5 mol% or less, 0.It can be 5 mol% or more and 1 mol% or less, or within any and all sub-ranges formed from each end point of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom are K. 2 O may be substantially free of, or may be free of K 2 O.

[0156] In a plurality of embodiments, the concentration of K in the glass composition and the colored glass article obtained therefrom 2 O can be 0 mol% or more, 0.01 mol% or more, 0.1 mol% or more, 0.2 mol% or more, 0.25 mol% or more, 0.4 mol% or more, or further 0.5 mol% or more. In a plurality of embodiments, the concentration of K in the glass composition and the colored glass article obtained therefrom 2 O can be 5 mol% or less, 4 mol% or less, 3 mol% or less, 2 mol% or less, or further 1 mol% or less. In a plurality of embodiments, the concentration of K in the glass composition and the colored glass article obtained therefrom 2The concentration of O is 0 mol% or more and 5 mol% or less, 0 mol% or more and 4 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1 mol% or less, 0.01 mol% or more and 5 mol% or less, 0.01 mol% or more and 4 mol% or less, 0.01 mol% or more and 3 mol% or less, 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.1 mol% or more and 5 mol% or less, 0.1 mol% or more and 4 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.2 mol% or more and 5 mol% or less, 0.2 mol% or more and 4 mol% or less, 0.2 mol% or more and 3 mol% or less, 0.2 mol% or more and 2 mol% or less, 0.2 mol% or more and 1 mol% or less, 0.25 mol% or more and 5 mol% or less, 0.25 mol% or more and 4 mol% or less, 0.25 mol% or more and 3 mol% or less, 0.25 mol% or more and 2 mol% or less, 0.25 mol% or more and 1 mol% or less, 0.3 mol% or more and 5 mol% or less, 0.3 mol% or more and 5 mol% or less, 0.3 mol% or more and 3 mol% or less, 0.3 mol% or more and 2 mol% or less, 0.3 mol% or more and 1 mol% or less, 0.4 mol% or more and 5 mol% or less, 0.4 mol% or more and 4 mol% or less, 0.4 mol% or more and 3 mol% or less, 0.4 mol% or more and 2 mol% or less, 0.4 mol% or more and 1 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3 mol% or less, 0.5 mol% or more and 2 mol% or less, or further 0.5 mol% or more and 1 mol% or less, or it can be within any and all sub-ranges formed from each end point of these ranges.

[0157] In this specification, R 2 O is Li present in the glass composition and the colored glass article obtained therefrom 2 O, Na 2 O, and K 2 O in total (mol%) (that is, R 2 O = Li 2 O (mol%) + Na 2 O (mol%) + K 2 O (mol%)). B 2 O 3 Similarly, the alkali oxides also contribute to lowering the softening point and forming temperature of the glass composition. And thereby, for example, SiO contained in the glass composition2 The increase in the softening point and forming temperature of the glass composition due to a relatively large amount of [substance] is offset. By combining multiple types of alkali oxides (for example, two or more types of alkali oxides) in the glass composition, the softening point and forming temperature can be further reduced. This phenomenon is called the "mixed alkali effect". However, if the amount of alkali oxide is too large, it has been confirmed that the average thermal expansion coefficient of the glass composition may increase to more than 100×10 -7 / °C, which may be undesirable.

[0158] In a plurality of embodiments, the concentration of R 2 O in the glass composition and the colored glass article obtained therefrom can be 1 mol% or more and 35 mol% or less. In a plurality of embodiments, the concentration of R 2 O in the glass composition and the colored glass article obtained therefrom can be 6 mol% or more and 25 mol% or less, or further 8 mol% or more and 23 mol% or less. In a plurality of embodiments, the concentration of R 2 O in the glass composition and the colored glass article obtained therefrom can be 2 mol% or more, 4 mol% or more, more than 6 mol%, 8 mol% or more, 10 mol% or more, 10.3 mol% or more, 11 mol% or more, 12 mol% or more, 13 mol% or more, or further 14 mol% or more. In a plurality of embodiments, the concentration of R 2 O in the glass composition and the colored glass article obtained therefrom can be 35 mol% or less, 30 mol% or less, 25 mol% or less, 23 mol% or less, 22 mol% or less, 21 mol% or less, 20 mol% or less, 19 mol% or less, 18 mol% or less, 17 mol% or less, or further 16 mol% or less. In a plurality of embodiments, the concentration of R 2The concentration of O is 1 mol% or more and 35 mol% or less, 1 mol% or more and 30 mol% or less, 1 mol% or more and 25 mol% or less, 1 mol% or more and 23 mol% or less, 1 mol% or more and 22 mol% or less, 1 mol% or more and 21 mol% or less, 1 mol% or more and 20 mol% or less, 1 mol% or more and 19 mol% or less, 1 mol% or more and 18 mol% or less, 1 mol% or more and 17 mol% or less, 1 mol% or more and 16 mol% or less, 2 mol% or more and 35 mol% or less, 2 mol% or more and 30 mol% or less, 2 mol% or more and 25 mol% or less, 2 mol% or more and 23 mol% or less, 2 mol% or more and 22 mol% or less, 2 mol% or more and 21 mol% or less, 2 mol% or more and 20 mol% or less, 2 mol% or more and 19 mol% or less, 2 mol% or more and 18 mol% or less, 2 mol% or more and 17 mol% or less, 2 mol% or more and 16 mol% or less, 4 mol% or more and 35 mol% or less, 4 mol% or more and 30 mol% or less, 4 mol% or more and 25 mol% or less, 4 mol% or more and 23 mol% or less, 4 mol% or more and 22 mol% or less, 4 mol% or more and 21 mol% or less, 4 mol% or more and 20 mol% or less, 4 mol% or more and 19 mol% or less, 4 mol% or more and 18 mol% or less, 4 mol% or more and 17 mol% or less, 4 mol% or more and 16 mol% or less, 6 mol% or more and 35 mol% or less, 6 mol% or more and 30 mol% or less, 6 mol% or more and 25 mol% or less, 6 mol% or more and 23 mol% or less, 6 mol% or more and 22 mol% or less, 6 mol% or more and 21 mol% or less, 6 mol% or more and 20 mol% or less, 6 mol% or more and 19 mol% or less, 6 mol% or more and 18 mol% or less, 6 mol% or more and 17 mol% or less, 6 mol% or more and 16 mol% or less, 8 mol% or more and 35 mol% or less, 8 mol% or more and 30 mol% or less, 8 mol% or more and 25 mol% or less, 8 mol% or more and 23 mol% or less, 8 mol% or more and 22 mol% or less, 8 mol% or more and 21 mol% or less, 8 mol% or more and 20 mol% or less, 8 mol% or more and 19 mol% or less, 8 mol% or more and 18 mol% or less, 8 mol% or more and 17 mol% or less, 8 mol% or more and 16 mol% or less, 10 mol% or more and 35 mol% or less, 10 mol% or more and 30 mol% or less, 10 mol% or more and 25 mol% or less, 10 mol% or more and 23 mol% or less, 10 mol% or more and 22 mol% or less, 10 mol% or more and 21 mol% or less, 10 mol% or more and 20 mol% or less, 10 mol% or more and 19 mol% or less, 10 mol% or more and 18 mol% or less, 10 mol% or more and 17 mol% or less, 10 mol% or more and 16 mol% or less, 11 mol% or more and 35 mol% or less, 11 mol% or more and 30 mol% or less, 11 mol% or more and 25 mol% or less, 11 mol% or more and 23 mol% or less,11 mol% or more and 22 mol% or less, 11 mol% or more and 21 mol% or less, 11 mol% or more and 20 mol% or less, 11 mol% or more and 19 mol% or less, 11 mol% or more and 18 mol% or less, 11 mol% or more and 17 mol% or less, 11 mol% or more and 16 mol% or less, 12 mol% or more and 35 mol% or less, 12 mol% or more and 30 mol% or less, 12 mol% or more and 25 mol% or less, 12 mol% or more and 23 mol% or less, 12 mol% or more and 22 mol% or less, 12 mol% or more and 21 mol% or less, 12 mol% or more and 20 mol% or less, 12 mol% or more and 19 mol% or less, 12 mol% or more and 18 mol% or less, 12 mol% or more and 17 mol% or less, 12 mol% or more and 16 mol% or less, 13 mol% or more and 35 mol% or less, 13 mol% or more and 30 mol% or less, 13 mol% or more and 25 mol% or less, 13 mol% or more and 23 mol% or less, 13 mol% or more and 22 mol% or less, 13 mol% or more and 21 mol% or less, 13 mol% or more and 20 mol% or less, 13 mol% or more and 19 mol% or less, 13 mol% or more and 18 mol% or less, 13 mol% or more and 17 mol% or less, 13 mol% or more and 16 mol% or less, 14 mol% or more and 35 mol% or less, 14 mol% or more and 30 mol% or less, 14 mol% or more and 25 mol% or less, 14 mol% or more and 23 mol% or less, 14 mol% or more and 22 mol% or less, 14 mol% or more and 21 mol% or less, 14 mol% or more and 20 mol% or less, 14 mol% or more and 19 mol% or less, 14 mol% or more and 18 mol% or less, 14 mol% or more and 17 mol% or less, or further 14 mol% or more and 16 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.,

[0159] In a plurality of embodiments, R in the glass composition 2 O and Al 2 O 3 The difference (i.e., R 2 O (mol%) - Al 2 O 3 (mol%)) can be adjusted to develop a desired observed color (e.g., pink, purple, red, orange, or blue). As described herein, R identified by analyzing the obtained colored glass article 2 O - Al 2 O 3can be correlated with the observed color of the colored glass article after heat treatment, together with the added colorant set. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from - 5 mol% to 7 mol% or further from - 3 mol% to 2 mol%. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from - 3 mol% to 6 mol%. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from - 1 mol% to 5 mol%. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from - 5 mol% to 1.5 mol%. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from - 3 mol% to 1.5 mol%. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from 1.5 mol% to 7 mol%. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from 1.5 mol% to 5 mol%. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3can be -5 mol% or more, -4 mol% or more, -3 mol% or more, -2.5 mol% or more, -2 mol% or more, -1.5 mol% or more, 0.2 mol% or more, 0.5 mol% or more, 1 mol% or more, 1.5 mol% or more, or further 2 mol% or more. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be 7 mol% or less, 6.5 mol% or less, 6 mol% or less, 5.5 mol% or less, 5 mol% or less, 4.5 mol% or less, 4 mol% or less, 3.5 mol% or less, 3 mol% or less, 2.5 mol% or less, 2 mol% or less, 1.5 mol% or less, 1 mol% or less, or further 0.5 mol% or less. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3 can be from -5 mol% to 7 mol%, from -5 mol% to 5 mol%, from -5 mol% to 3 mol%, from -5 mol% to 1.5 mol%, from -3 mol% to 7 mol%, from -3 mol% to 5 mol%, from -3 mol% to 3 mol%, from -3 mol% to 1.5 mol%, from -1 mol% to 7 mol%, from -1 mol% to 5 mol%, from -1 mol% to 3 mol%, from -1 mol% to 1.5 mol%, from 0 mol% to 7 mol%, from 0 mol% to 5 mol%, from 0 mol% to 3 mol%, from 0 mol% to 1.5 mol%, from 1.5 mol% to 7 mol%, from 1.5 mol% to 5 mol%, or further from 1.5 mol% to 3 mol%, or within any and all sub - ranges formed from the endpoints of these ranges. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O - Al 2 O 3is -3 mol% or more and 2 mol% or less, -3 mol% or more and 1.5 mol% or less, -3 mol% or more and 1 mol% or less, -3 mol% or more and 0.5 mol% or less, -2.5 mol% or more and 2 mol% or less, -2.5 mol% or more and 1.5 mol% or less, -2.5 mol% or more and 1 mol% or less, -2.5 mol% or more and 0.5 mol% or less, -2 mol% or more and 2 mol% or less, -2 mol% or more and 1.5 mol% or less, -2 mol% or more and 1 mol% or less, -2 mol% or more and 0.5 mol% or less, -1.5 mol% or more and 2 mol% or less, -1.5 mol% or more and 1.5 mol% or less, -1.5 mol% or more and 1 mol% or less, or further -1.5 mol% or more and 0.5 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O and Al 2 O 3 concentration difference is 0.2 mol% or more and 5 mol% or less, 0.2 mol% or more and 4.5 mol% or less, 0.2 mol% or more and 4 mol% or less, 0.2 mol% or more and 3.5 mol% or less, 0.2 mol% or more and 3 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4.5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3.5 mol% or less, 0.5 mol% or more and 3 mol% or less, 1 mol% or more and 5 mol% or less, 1 mol% or more and 4.5 mol% or less, 1 mol% or more and 4 mol% or less, 1 mol% or more and 3.5 mol% or less, 1 mol% or more and 3 mol% or less, 1.5 mol% or more and 5 mol% or less, 1.5 mol% or more and 4.5 mol% or less, 1.5 mol% or more and 4 mol% or less, 1.5 mol% or more and 3.5 mol% or less, 1.5 mol% or more and 3 mol% or less, 2 mol% or more and 5 mol% or less, 2 mol% or more and 4.5 mol% or less, 2 mol% or more and 4 mol% or less, 2 mol% or more and 3.5 mol% or less, 2 mol% or more and 3 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0160] Also, in multiple embodiments, the glass compositions and the colored glass articles obtained therefrom described herein further contain MgO and / or ZnO, thereby improving the residual rate of colorants (e.g., Au, etc.) in the glass by lowering the melting point of the glass composition. When the melting point of the glass composition is lowered, the glass composition can be melted at a relatively low temperature, and evaporation of colorants such as gold from the glass can be suppressed, so it is considered that it can contribute to the improvement of the residual rate of the colorant. Also, although not wishing to be bound by theory, Li 2 O and / or Na 2 O being partially replaced by MgO and / or ZnO is also considered to contribute to the improvement of the residual rate of the colorant. Specifically, in the glass composition batch, Li 2 O is contained in the form of lithium carbonate, and / or Na 2 O is contained in the form of sodium carbonate. And when the glass composition is melted, carbon dioxide gas is released from the glass composition. At that time, colorants such as Au also escape from the glass composition in the form contained in this carbon dioxide gas. Therefore, the improvement of the residual rate of the colorant is considered to be due to the reduction of the amount of carbonate. Furthermore, MgO and / or ZnO can increase the solubility of some colorants (e.g., Cr 2 O 3 etc.) in the glass, thereby preventing the formation of undesirable crystal phases (such as Cr spinel crystals), and it is considered that the color gamut achievable in the obtained colored glass article can be widened. For example, in an embodiment containing Cr 2 O 3 as the colorant, the total of MgO and ZnO present in the glass composition and the colored glass article obtained therefrom (i.e., MgO (mol%) + ZnO (mol%)) can be 0 mol% or more and 6 mol% or less, further or 4.5 mol% or less. Although not wishing to be bound by theory, it is presumed that similar behavior can occur with colorants other than Au and Cr 2 O 3 .

[0161] In multiple embodiments, the total (mol %) of MgO and ZnO present in the glass composition and the colored glass article obtained therefrom (i.e., MgO (mol %) + ZnO (mol %)) can be 0 mol % or more and 8 mol % or less, 0.1 mol % or more and 8 mol % or less, 0 mol % or more and 6 mol % or less, 0.1 mol % or more and 6 mol % or less, or further 0 mol % or more and 4.5 mol % or less. In multiple embodiments, the total of MgO and ZnO in the glass composition and the colored glass article obtained therefrom can be 0.5 mol % or more and 5.5 mol % or less. In multiple embodiments, the total of MgO and ZnO in the glass composition and the colored glass article obtained therefrom can be 0 mol % or more, 0.01 mol % or more, 0.1 mol % or more, 0.5 mol % or more, 1 mol % or more, 1.5 mol % or more, 2 mol % or more, 2.5 mol % or more, 3 mol % or more, or further 3.5 mol % or more. In multiple embodiments, the total of MgO and ZnO in the glass composition and the colored glass article obtained therefrom can be 8 mol % or less, 7 mol % or less, 6 mol % or less, 5.5 mol % or less, 5 mol % or less, 4.5 mol % or less, 4.25 mol % or less, or further 4 mol % or less. In multiple embodiments, the total of MgO and ZnO in the glass composition and the colored glass article obtained therefrom can be 0 mol % or more and 8 mol % or less, 0 mol % or more and 7 mol % or less, 0 mol % or more and 6 mol % or less, 0 mol % or more and 5.5 mol % or less, 0 mol % or more and 5 mol % or less, 0 mol % or more and 4.5 mol % or less, 0 mol % or more and 4.25 mol % or less, 0 mol % or more and 4 mol % or less, 0.1 mol % or more and 8 mol % or less, 0.1 mol % or more and 7 mol % or less, 0.1 mol % or more and 6 mol % or less, 0.1 mol % or more and 5.5 mol % or less, 0.1 mol % or more and 5 mol % or less, 0.1 mol % or more and 4.5 mol % or less, 0.1 mol % or more and 4.25 mol % or less, 0.1 mol % or more and 4 mol % or less, 0.5 mol % or more and 8 mol % or less, 0.5 mol % or more and 7 mol % or less, 0.5 mol % or more and 6 mol % or less, 0.5 mol % or more and 5.5 mol % or less, 0.5 mol % or more and 5 mol % or less, 0.5 mol % or more and 4.5 mol % or less, 0.5 mol % or more and 4.25 mol % or less, 0.5 mol % or more and 4 mol % or less, 1 mol % or more and 8 mol % or less, 1 mol % or more and 7 mol % or less, 1 mol % or more and 6 mol % or less, 1 mol % or more and 5.5 mol% or less, 1 mol% or more and 5 mol% or less, 1 mol% or more and 4.5 mol% or less, 1 mol% or more and 4.25 mol% or less, 1 mol% or more and 4 mol% or less, 1.5 mol% or more and 8 mol% or less, 1.5 mol% or more and 7 mol% or less, 1.5 mol% or more and 6 mol% or less, 1.5 mol% or more and 5.5 mol% or less, 1.5 mol% or more and 5 mol% or less, 1.5 mol% or more and 4.5 mol% or less, 1.5 mol% or more and 4.25 mol% or less, 1.5 mol% or more and 4 mol% or less, 2 mol% or more and 8 mol% or less, 2 mol% or more and 7 mol% or less, 2 mol% or more and 6 mol% or less, 2 mol% or more and 5.5 mol% or less, 2 mol% or more and 5 mol% or less, 2 mol% or more and 4.5 mol% or less, 2 mol% or more and 4.25 mol% or less, 2 mol% or more and 4 mol% or less, 2.5 mol% or more and 8 mol% or less, 2.5 mol% or more and 7 mol% or less, 2.5 mol% or more and 6 mol% or less, 2.5 mol% or more and 5.5 mol% or less, 2.5 mol% or more and 5 mol% or less, 2.5 mol% or more and 4.5 mol% or less, 2.5 mol% or more and 4.25 mol% or less, 2.5 mol% or more and 4 mol% or less, 3 mol% or more and 8 mol% or less, 3 mol% or more and 7 mol% or less, 3 mol% or more and 6 mol% or less, 3 mol% or more and 5.5 mol% or less, 3 mol% or more and 5 mol% or less, 3 mol% or more and 4.5 mol% or less, 3 mol% or more and 4.25 mol% or less, 3 mol% or more and 4 mol% or less, 3 mol% or more and 8 mol% or less, 3 mol% or more and 7 mol% or less, 3.5 mol% or more and 6 mol% or less, 3.5 mol% or more and 5.5 mol% or less, 3.5 mol% or more and 5 mol% or less, or further or 3.5 mol% or more and 4.5 mol% or less, 3.5 mol% or more and 4.25 mol% or less, 3.5 mol% or more and 4 mol% or less, or it can be within any and all sub-ranges formed from each endpoint of these ranges.

[0162] MgO can improve the residual rate of the colorant and lower the viscosity of the glass composition, thereby improving the formability, strain point, and Young's modulus and enhancing the ion exchangeability. However, if the addition amount of MgO to the glass composition is too large, the diffusibility of sodium ions and potassium ions into the glass composition will decrease, which will have an adverse effect on the ion exchange performance of the obtained colored glass article (that is, how well it can be ion-exchanged).

[0163] In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain 0 mol% or more and 8 mol% or less of MgO, or further 0 mol% or more and 4.5 mol% or less of MgO. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain 0.5 mol% or more and 7 mol% or less of MgO. In multiple embodiments, the concentration of MgO in the glass composition can be 0 mol% or more, 0.5 mol% or more, 1 mol% or more, 1.5 mol% or more, 2 mol% or more, or further 2.5 mol% or more. In multiple embodiments, the concentration of MgO in the glass composition can be 8 mol% or less, 7 mol% or less, 6 mol% or less, 5.5 mol% or less, 5 mol% or less, 4.5 mol% or less, 4 mol% or less, 3.5 mol% or less, 3 mol% or less, 2.5 mol% or less, 2 mol% or less, 1.5 mol% or less, or further 1 mol% or less. In multiple embodiments, the concentration of MgO in the glass composition can be 0 mol% or more and 8 mol% or less, 0 mol% or more and 7 mol% or less, 0 mol% or more and 6 mol% or less, 0 mol% or more and 5.5 mol% or less, 0 mol% or more and 5 mol% or less, 0 mol% or more and 4.5 mol% or less, 0 mol% or more and 4 mol% or less, 0 mol% or more and 3.5 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2.5 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1.5 mol% or less, 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.5 mol% or less, 0.5 mol% or more and 8 mol% or less, 0.5 mol% or more and 7 mol% or less, 0.5 mol% or more and 6 mol% or less, 0.5 mol% or more and 5.5 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4.5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3.5 mol% or less, 0.5 mol% or more and 3 mol% or less, 0.5 mol% or more and 2.5 mol% or less, 0.5 mol% or more and 2 mol% or less, 0.5 mol% or more and 1.5 mol% or less, 0.5 mol% or more and 1 mol% or less, 1 mol% or more and 8 mol% or less, 1 mol% or more and 7 mol% or less, 1 mol% or more and 6 mol% or less, 1 mol% or more and 5.5 mol% or less, 1 mol% or more and 5 mol% or less, 1 mol% or more and 4.5 mol% or less, 1 mol% or more and 4 mol% or less, 1 mol% or more and 3.5 mol% or less, 1 mol% or more and 3 mol% or less, 1 mol% or more and 2.5 mol% or less, 1 mol% or more and 2 mol% or less, 1 mol% or more and 1.5 mol% or less, 1.5 mol% or more and 8 mol% or less, 1.5 mol% or more and 7 mol% or less, 1.5 mol% or more and 6 mol% or less, 1.5 mol% or more and 5.5 mol% or less, 1.5 mol% or more and 5 mol% or less, 1.5 mol% or more and 4.5 mol% or less, 1.5 mol% or more and 4 mol% or less, 1.5 mol% or more and 3.5 mol% or less, 1.5 mol% or more and 3 mol% or less, 1.5 mol% or more and 2.5 mol% or less, 1.5 mol% or more and 2 mol% or less, 2 mol% or more and 8 mol% or less, 2 mol% or more and 7 mol% or less, 2 mol% or more and 6 mol% or less, 2 mol% or more and 5.5 mol% or less, 2 mol% or more and 5 mol% or less, 2 mol% or more and 4.5 mol% or less, 2 mol% or more and 4 mol% or less, 2 mol% or more and 3.5 mol% or less, 2 mol% or more and 3 mol% or less, 2 mol% or more and 2.5 mol% or less, 0 mol% or more and 8 mol% or less, 2.5 mol% or more and 7 mol% or less, 2.5 mol% or more and 6 mol% or less, 2.5 mol% or more and 5.5 mol% or less, 2.5 mol% or more and 5 mol% or less, 2.5 mol% or more and 4.5 mol% or less, 2.5 mol% or more and 4 mol% or less, 2.5 mol% or more and 3.5 mol% or less, or 2.5 mol% or more and 3 mol% or less, or it can be within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can also be substantially free of or free of MgO.

[0164] In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain 0 mol% or more and 6 mol% or less of MgO. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain 0.1 mol% or more and 5 mol% or less of MgO. In multiple embodiments, the concentration of MgO in the glass composition can be 0 mol% or more, 0.1 mol% or more, or further 0.5 mol% or more. In multiple embodiments, the concentration of MgO in the glass composition can be 6 mol% or less, 5 mol% or less, 4 mol% or less, 3 mol% or less, 2 mol% or less, or further 1 mol% or less. In multiple embodiments, the concentration of MgO in the glass composition can be 0 mol% or more and 6 mol% or less, 0 mol% or more and 5 mol% or less, 0 mol% or more and 4 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1 mol% or less, 0.1 mol% or more and 6 mol% or less, 0.1 mol% or more and 5 mol% or less, 0.1 mol% or more and 4 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.5 mol% or more and 6 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3 mol% or less, 0.5 mol% or more and 2 mol% or less, or further 0.5 mol% or more and 1 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can be substantially free of MgO or can be free of MgO.

[0165] ZnO can improve the residual rate of the colorant and lower the viscosity of the glass composition, thereby improving formability, strain point, Young's modulus, and enhancing ion exchangeability. However, if the addition amount of ZnO to the glass composition is too large, the diffusibility of sodium ions and potassium ions into the glass composition will decrease, which will have an adverse effect on the ion exchange performance of the obtained colored glass article (i.e., how well it can be ion-exchanged).

[0166] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain ZnO in an amount of 0 mol% or more and 5 mol% or less, or further 0 mol% or more and 4.5 mol% or less. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain ZnO in an amount of 0.1 mol% or more and 4 mol% or less. In a plurality of embodiments, the concentration of ZnO in the glass composition can be 0 mol% or more, 0.1 mol% or more, 0.25 mol% or more, 0.5 mol% or more, 0.75 mol% or more, 1 mol% or more, 1.5 mol% or more, or further 2 mol% or more. In a plurality of embodiments, the concentration of ZnO in the glass composition can be 5 mol% or less, 4.5 mol% or less, 4 mol% or less, 3.5 mol% or less, 3 mol% or less, 2.5 mol% or less, 2 mol% or less, 1.75 mol% or less, 1.5 mol% or less, 1.25 mol% or less, or further 1 mol% or less. In a plurality of embodiments, the concentration of ZnO in the glass composition can be 0 mol% or more and 5 mol% or less, 0 mol% or more and 4.5 mol% or less, 0 mol% or more and 4 mol% or less, 0 mol% or more and 3.5 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2.5 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1.75 mol% or less, 0 mol% or more and 1.5 mol% or less, 0 mol% or more and 1.25 mol% or less, 0 mol% or more and 1 mol% or less, 0.1 mol% or more and 5 mol% or less, 0.1 mol% or more and 4.5 mol% or less, 0.1 mol% or more and 4 mol% or less, 0.1 mol% or more and 3.5 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2.5 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1.75 mol% or less, 0.1 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 1.25 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.25 mol% or more and 5 mol% or less, 0.25 mol% or more and 4.5 mol% or less, 0.25 mol% or more and 4 mol% or less, 0.25 mol% or more and 3.5 mol% or less, 0.25 mol% or more and 3 mol% or less, 0.25 mol% or more and 2.5 mol% or less, 0.25 mol% or more and 2 mol% or less, 0.25 mol% or more and 1.75 mol% or less, 0.25 mol% or more and 1.5 mol% or less, 0.25 mol% or more and 1.25 mol% or less, 0.25 mol% or more and 1 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4.5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3.5 mol% or less, 0.5 mol% or more and 3 mol% or less, 0.5 mol% or more and 2.5 mol% or less, 0.5 mol% or more and 2 mol% or less, 0.5 mol% or more and 1.75 mol% or less, 0.5 mol% or more and 1.5 mol% or less, 0.5 mol% or more and 1.25 mol% or less, 0.5 mol% or more and 1 mol% or less, 0.75 mol% or more and 5 mol% or less, 0.75 mol% or more and 4 mol% or less, 0.75 mol% or more and 3 mol% or less, 0.75 mol% or more and 2.5 mol% or less, 0.75 mol% or more and 2 mol% or less, 0.75 mol% or more and 1.75 mol% or less, 0.75 mol% or more and 1.5 mol% or less, 0.75 mol% or more and 1.25 mol% or less, 1 mol% or more and 1 mol% or less, 1 mol% or more and 5 mol% or less, 1 mol% or more and 4.5 mol% or less, 1 mol% or more and 4 mol% or less, 1 mol% or more and 3.5 mol% or less, 1 mol% or more and 3 mol% or less, 1 mol% or more and 2.5 mol% or less, 1 mol% or more and 2 mol% or less, 1 mol% or more and 1.75 mol% or less, 1 mol% or more and 1.5 mol% or less, 1 mol% or more and 1.25 mol% or less, 1.5 mol% or more and 5 mol% or less, 1.5 mol% or more and 4.5 mol% or less, 1.5 mol% or more and 4 mol% or less, 1.5 mol% or more and 3.5 mol% or less, 1.5 mol% or more and 3 mol% or less, 1.5 mol% or more and 2.5 mol% or less, 1.5 mol% or more and 2 mol% or less, 1.5 mol% or more and 1.75 mol% or less, 2 mol% or more and 5 mol% or less, 2 mol% or more and 4.5 mol% or less, 2 mol% or more and 4 mol% or less, 2 mol% or more and 3.5 mol% or less, 2 mol% or more and 3 mol% or less, or further or 2 mol% or more and 2.5 mol% or less, or it can be within any and all sub-ranges formed from each end point of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may be substantially free of ZnO or may contain no ZnO.

[0167] Similar to ZnO and MgO which is an alkaline earth oxide, other alkaline earth oxides such as CaO, SrO, and BaO also lower the melting point of the glass composition. Therefore, in order to contribute to the improvement of the residual rate of the colorant by lowering the melting point of the glass composition, CaO, SrO, and / or BaO can also be included in the glass composition and the colored glass article obtained therefrom.

[0168] In a plurality of embodiments, the glass compositions described herein and the colored glass articles obtained therefrom can further contain CaO. CaO can improve formability, strain point, and Young's modulus, and enhance ion exchangeability by reducing the viscosity of the glass composition. However, if the amount of CaO added to the glass composition is too large, the diffusibility of sodium ions and potassium ions into the glass composition will decrease, which will have an adverse effect on the ion exchange performance of the resulting colored glass article (i.e., how well it can be ion-exchanged).

[0169] In a plurality of embodiments, the concentration of CaO in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.25 mol% or more, 0.5 mol% or more, or further 0.75 mol% or more. In a plurality of embodiments, the concentration of CaO in the glass composition and the colored glass article obtained therefrom can be 7 mol% or less, 6.5 mol% or less, 6 mol% or less, 5.5 mol% or less, 5 mol% or less, 4.5 mol% or less, 4 mol% or less, 3.5 mol% or less, 3 mol% or less, 2.5 mol% or less, 2 mol% or less, 1.75 mol% or less, 1.5 mol% or less, 1.25 mol% or less, or further 1 mol% or less. In a plurality of embodiments, the concentration of CaO in the glass composition and the colored glass article obtained therefrom can be from 0 mol% to 7 mol%, from 0 mol% to 6.5 mol%, from 0 mol% to 6 mol%, from 0 mol% to 5.5 mol%, from 0 mol% to 5 mol%, from 0 mol% to 4.5 mol%, from 0 mol% to 4 mol%, from 0 mol% to 3.5 mol%, from 0 mol% to 3 mol%, from 0 mol% to 2.5 mol%, from 0 mol% to 2 mol%, from 0 mol% to 1.75 mol%, from 0 mol% to 1.5 mol%, from 0 mol% to 1.25 mol%, from 0 mol% to 1 mol%, from 0.25 mol% to 7 mol%, from 0.25 mol% to 6.5 mol%, from 0.25 mol% to 6 mol%, from 0.25 mol% to 5.5 mol%, from 0.25 mol% to 5 mol%, from 0.25 mol% to 4.5 mol%, from 0.25 mol% to 4 mol%, from 0.25 mol% to 3.5 mol%, from 0.25 mol% to 3 mol%, from 0.25 mol% to 2.5 mol%, from 0.25 mol% to 2 mol%, from 0.25 mol% to 1.75 mol%, from 0.25 mol% to 1.5 mol%, from 0.25 mol% to 1.25 mol%, from 0.25 mol% to 1 mol%, from 0.5 mol% to 7 mol%, from 0.5 mol% to 6.5 mol%, from 0.5 mol% to 6 mol%, from 0.5 mol% to 5.5 mol%, from 0.5 mol% to 5 mol%, from 0.5 mol% to 4.5 mol%, from 0.5 mol% to 4 mol%, from 0.5 mol% to 3.5 mol%, from 0.5 mol% to 3 mol%, from 0.5 mol% to 2.5 mol%, from 0.5 mol% to 2 mol%, from 0.5 mol% to 1.75 mol%, from 0.5 mol% or more and 1.5 mol% or less, 0.5 mol% or more and 1.25 mol% or less, 0.5 mol% or more and 1 mol% or less, 0.75 mol% or more and 7 mol% or less, 0.75 mol% or more and 6.5 mol% or less, 0.75 mol% or more and 6 mol% or less, 0.75 mol% or more and 5.5 mol% or less, 0.75 mol% or more and 5 mol% or less, 0.75 mol% or more and 4.5 mol% or less, 0.75 mol% or more and 4 mol% or less, 0.75 mol% or more and 3.5 mol% or less, 0.75 mol% or more and 3 mol% or less, 0.75 mol% or more and 2.5 mol% or less, 0.75 mol% or more and 2 mol% or less, 0.75 mol% or more and 1.75 mol% or less, 0.75 mol% or more and 1.5 mol% or less, 0.75 mol% or more and 1.25 mol% or less, or further or 0.75 mol% or more and 1 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can also be substantially free of CaO or free of CaO.

[0170] In multiple embodiments, the concentration of SrO in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.25 mol% or more, 0.5 mol% or more, or further 0.75 mol% or more. In multiple embodiments, the concentration of SrO in the glass composition and the colored glass article obtained therefrom can be 2 mol% or less, 1.75 mol% or less, 1.5 mol% or less, 1.25 mol% or less, or further 1 mol% or less. In multiple embodiments, the concentration of SrO in the glass composition and the colored glass article obtained therefrom can be from 0 mol% to 2 mol%, from 0 mol% to 1.75 mol%, from 0 mol% to 1.5 mol%, from 0 mol% to 1.25 mol%, from 0 mol% to 1 mol%, from 0.25 mol% to 2 mol%, from 0.25 mol% to 1.75 mol%, from 0.25 mol% to 1.5 mol%, from 0.25 mol% to 1.25 mol%, from 0.25 mol% to 1 mol%, from 0.5 mol% to 2 mol%, from 0.5 mol% to 1.75 mol%, from 0.5 mol% to 1.5 mol%, from 0.5 mol% to 1.25 mol%, from 0.5 mol% to 1 mol%, from 0.75 mol% to 2 mol%, from 0.75 mol% to 1.75 mol%, from 0.75 mol% to 1.5 mol%, from 0.75 mol% to 1.25 mol%, or further from 0.75 mol% to 1 mol%, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can be substantially free of SrO or can be free of SrO.

[0171] In a plurality of embodiments, the concentration of BaO in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.25 mol% or more, 0.5 mol% or more, or further 0.75 mol% or more. In a plurality of embodiments, the concentration of BaO in the glass composition and the colored glass article obtained therefrom can be 2 mol% or less, 1.75 mol% or less, 1.5 mol% or less, 1.25 mol% or less, or further 1 mol% or less. In a plurality of embodiments, the concentration of BaO in the glass composition and the colored glass article obtained therefrom can be from 0 mol% to 2 mol%, from 0 mol% to 1.75 mol%, from 0 mol% to 1.5 mol%, from 0 mol% to 1.25 mol%, from 0 mol% to 1 mol%, from 0.25 mol% to 2 mol%, from 0.25 mol% to 1.75 mol%, from 0.25 mol% to 1.5 mol%, from 0.25 mol% to 1.25 mol%, from 0.25 mol% to 1 mol%, from 0.5 mol% to 2 mol%, from 0.5 mol% to 1.75 mol%, from 0.5 mol% to 1.5 mol%, from 0.5 mol% to 1.25 mol%, from 0.5 mol% to 1 mol%, from 0.75 mol% to 2 mol%, from 0.75 mol% to 1.75 mol%, from 0.75 mol% to 1.5 mol%, from 0.75 mol% to 1.25 mol%, or further from 0.75 mol% to 1 mol%, or within any and all sub-ranges formed from the endpoints of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can be substantially free of BaO or can be free of BaO.

[0172] In this specification, R'O is the total (mol%) of MgO, ZnO, CaO, BaO, and SrO (i.e., R'O = MgO (mol%) + ZnO (mol%) + CaO (mol%) + BaO (mol%) + SrO (mol%)). In a plurality of embodiments, the concentration of R'O in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.5 mol% or more, 1 mol% or more, 1.5 mol% or more, 2 mol% or more, or further 2.5 mol% or more. In a plurality of embodiments, the concentration of R'O in the glass composition and the colored glass article obtained therefrom can be 8 mol% or less, 7.5 mol% or less, 7 mol% or less, 6.5 mol% or less, 6 mol% or less, 5 mol% or less, 5 mol% or less, 4.5 mol% or less, 4 mol% or less, or further 3.5 mol% or less.In multiple embodiments, the concentration of R´O in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more and 8 mol% or less, 0 mol% or more and 7.5 mol% or less, 0 mol% or more and 7 mol% or less, 0 mol% or more and 6.5 mol% or less, 0 mol% or more and 6 mol% or less, 0 mol% or more and 5.5 mol% or less, 0 mol% or more and 5 mol% or less, 0 mol% or more and 4.5 mol% or less, 0 mol% or more and 4 mol% or less, 0 mol% or more and 3.5 mol% or less, 0.5 mol% or more and 8 mol% or less, 0.5 mol% or more and 7.5 mol% or less, 0.5 mol% or more and 7 mol% or less, 0.5 mol% or more and 6.5 mol% or less, 0.5 mol% or more and 6 mol% or less, 0.5 mol% or more and 5.5 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4.5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3.5 mol% or less, 0.5 mol% or more and 8 mol% or less, 1 mol% or more and 7.5 mol% or less, 0.5 mol% or more and 7 mol% or less, 1 mol% or more and 6.5 mol% or less, 0.5 mol% or more and 6 mol% or less, 1 mol% or more and 5.5 mol% or less, 1 mol% or more and 5 mol% or less, 1 mol% or more and 4.5 mol% or less, 1 mol% or more and 4 mol% or less, 1 mol% or more and 3.5 mol% or less, 1.5 mol% or more and 8 mol% or less, 1.5 mol% or more and 7.5 mol% or less, 1.5 mol% or more and 7 mol% or less, 1.5 mol% or more and 6.5 mol% or less, 1.5 mol% or more and 6 mol% or less, 1.5 mol% or more and 5.5 mol% or less, 1.5 mol% or more and 5 mol% or less, 1.5 mol% or more and 4.5 mol% or less, 1.5 mol% or more and 4 mol% or less, 1.5 mol% or more and 3.5 mol% or less, 2 mol% or more and 8 mol% or less, 2 mol% or more and 7.5 mol% or less, 2 mol% or more and 7 mol% or less, 2 mol% or more and 6.5 mol% or less, 2 mol% or more and 6 mol% or less, 2 mol% or more and 5.5 mol% or less, 2 mol% or more and 5 mol% or less, 2 mol% or more and 4.5 mol% or less, 2 mol% or more and 4 mol% or less, 2 mol% or more and 3.5 mol% or less, 2.5 mol% or more and 8 mol% or less, 2.5 mol% or more and 7.5 mol% or less, 2.5 mol% or more and 7 mol% or less, 2.5 mol% or more and 6.5 mol% or less, 2.5 mol% or more and 6 mol% or less, 2.5 mol% or more and 5.5 mol% or less, 2.5 mol% or more and 5 mol% or less, 2.5 mol% or more and 4.5 mol% or less, 2.5 mol% or more and 4 mol% or less, or 2.5 mol% or more and 3.5 mol% or less, or can be within any and all sub-ranges formed from the endpoints of these ranges.

[0173] In a plurality of embodiments, R 2 The total of RO, CaO, MgO, and ZnO (RO 2 (mol%) + CaO (mol%) + MgO (mol%) + ZnO (mol%)) can be 35 mol% or less. Without wishing to be bound by theory, by minimizing the content of RO, CaO, MgO, and ZnO in the glass composition, it is considered possible to achieve a colored glass article having a desirable dielectric constant, such as when using the colored glass article as part of the housing of an electronic device. In a plurality of embodiments, R 2 The total of RO, CaO, MgO, and ZnO (RO 2O (mol%) + CaO (mol%) + MgO (mol%) + ZnO (mol%) is 1 mol% or more and 35 mol% or less, 1 mol% or more and 30 mol% or less, 1 mol% or more and 25 mol% or less, 1 mol% or more and 20 mol% or less, 1 mol% or more and 15 mol% or less, 1 mol% or more and 10 mol% or less, 2 mol% or more and 35 mol% or less, 2 mol% or more and 30 mol% or less, 2 mol% or more and 25 mol% or less, 2 mol% or more and 20 mol% or less, 2 mol% or more and 15 mol% or less, 2 mol% or more and 10 mol% or less, 3 mol% or more and 35 mol% or less, 3 mol% or more and 30 mol% or less, 3 mol% or more and 25 mol% or less, 3 mol% or more and 20 mol% or less, 3 mol% or more and 15 mol% or less, 3 mol% or more and 10 mol% or less, 4 mol% or more and 35 mol% or less, 4 mol% or more and 30 mol% or less, 4 mol% or more and 25 mol% or less, 4 mol% or more and 20 mol% or less, 4 mol% or more and 15 mol% or less, 4 mol% or more and 10 mol% or less, 4 mol% or more and 35 mol% or less, 5 mol% or more and 30 mol% or less, 5 mol% or more and 25 mol% or less, 5 mol% or more and 20 mol% or less, 5 mol% or more and 15 mol% or less, 5 mol% or more and 10 mol% or less, 6 mol% or more and 35 mol% or less, 6 mol% or more and 30 mol% or less, 6 mol% or more and 25 mol% or less, 6 mol% or more and 20 mol% or less, 6 mol% or more and 15 mol% or less, 6 mol% or more and 10 mol% or less, 7 mol% or more and 35 mol% or less, 7 mol% or more and 30 mol% or less, 7 mol% or more and 25 mol% or less, 7 mol% or more and 20 mol% or less, 7 mol% or more and 15 mol% or less, 7 mol% or more and 10 mol% or less, 8 mol% or more and 35 mol% or less, 8 mol% or more and 30 mol% or less, 8 mol% or more and 25 mol% or less, 8 mol% or more and 20 mol% or less, 8 mol% or more and 15 mol% or less, or further or 8 mol% or more and 10 mol% or less.

[0174] In a plurality of embodiments, Al present in the glass composition and the colored glass article obtained therefrom 2 O 3 , MgO, and the total of ZnO (i.e., Al 2 O 3 (mol%) + MgO (mol%) + ZnO (mol%)) can be 12 mol% or more and 22 mol% or less. Without wishing to be bound by theory, Al 2 O 3By keeping the blending of MgO and ZnO within this range, it is considered possible to contribute to preventing the formation of an undesirable crystal phase in the resulting colored glass article. For example, but not limited to, in the colorant set in the glass composition and the colored glass article obtained therefrom, when Cr 2 O 3 is included, by keeping the blending of Al 2 O 3 , MgO, and ZnO within this range, the solubility of the colorant Cr 2 O 3 can be increased, thereby preventing the formation of Cr spinel crystals and expanding the achievable color gamut in the resulting colored glass article. Although not wishing to be bound by theory, it is presumed that similar behavior may occur with colorants other than Cr 2 O 3 .

[0175] In a plurality of embodiments, the total of Al 2 O 3 , MgO, and ZnO in the glass composition and the colored glass article obtained therefrom can be 13 mol% or more and 21.5 mol% or less. In a plurality of embodiments, the total of Al 2 O 3 , MgO, and ZnO in the glass composition and the colored glass article obtained therefrom can be 12 mol% or more, 13 mol% or more, 14 mol% or more, 15 mol% or more, or further 16 mol% or more. In a plurality of embodiments, the total of Al 2 O 3 , MgO, and ZnO in the glass composition and the colored glass article obtained therefrom can be 22 mol% or less, 21.5 mol% or less, 21 mol% or less, 20.5 mol% or less, or further 20 mol% or less. In a plurality of embodiments, the total of Al 2 O 3, the total of MgO and ZnO can be 12 mol% or more and 22 mol% or less, 12 mol% or more and 21.5 mol% or less, 12 mol% or more and 21 mol% or less, 12 mol% or more and 20.5 mol% or less, 12 mol% or more and 20 mol% or less, 13 mol% or more and 22 mol% or less, 13 mol% or more and 21.5 mol% or less, 13 mol% or more and 21 mol% or less, 13 mol% or more and 20.5 mol% or less, 13 mol% or more and 20 mol% or less, 14 mol% or more and 22 mol% or less, 14 mol% or more and 21.5 mol% or less, 14 mol% or more and 21 mol% or less, 14 mol% or more and 20.5 mol% or less, 15 mol% or more and 20 mol% or less, 15 mol% or more and 22 mol% or less, 15 mol% or more and 21.5 mol% or less, 15 mol% or more and 21 mol% or less, 15 mol% or more and 20.5 mol% or less, 15 mol% or more and 20 mol% or less, 16 mol% or more and 22 mol% or less, 16 mol% or more and 21.5 mol% or less, 16 mol% or more and 21 mol% or less, 16 mol% or more and 20.5 mol% or less, or further or 16 mol% or more and 20 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges.

[0176] In a plurality of embodiments, Al present in the glass composition and the colored glass article obtained therefrom 2 O 3 , the total of MgO, CaO, and ZnO (i.e., Al 2 O 3 (mol%) + MgO (mol%) + CaO (mol%) + ZnO (mol%)) can be 12 mol% or more and 24 mol% or less. Without wishing to be bound by theory, it is considered that by keeping the proportions of Al 2 O 3 , MgO, CaO, and ZnO within this range, it can contribute to preventing the formation of undesirable crystal phases in the resulting colored glass article. Further, by relatively increasing the concentrations of high electric field strength modifiers such as Mg cations, Ca cations, and Zn cations, it is also possible to improve the mechanical properties of the resulting colored glass article, such as fracture toughness, elastic modulus, and drop test resistance.

[0177] In a plurality of embodiments, Al in the glass composition and the colored glass article obtained therefrom2 O 3 The total of Al 2 O 3 , MgO, CaO, and ZnO can be 12 mol% or more and 24 mol% or less. In a plurality of embodiments, Al in the glass composition and the colored glass article obtained therefrom 2 O 3 , MgO, CaO, and ZnO can be 12 mol% or more, 13 mol% or more, 14 mol% or more, 15 mol% or more, or further 16 mol% or more. In a plurality of embodiments, Al in the glass composition and the colored glass article obtained therefrom 2 O 3The total of Al2O3, MgO, CaO, and ZnO is 12 mol% or more and 24 mol% or less, 12 mol% or more and 23 mol% or less, 12 mol% or more and 22 mol% or less, 12 mol% or more and 21.5 mol% or less, 12 mol% or more and 21 mol% or less, 12 mol% or more and 20.5 mol% or less, 12 mol% or more and 20 mol% or less, 13 mol% or more and 24 mol% or less, 13 mol% or more and 23 mol% or less, 13 mol% or more and 22 mol% or less, 13 mol% or more and 21.5 mol% or less, 13 mol% or more and 21 mol% or less, 13 mol% or more and 20.5 mol% or less, 13 mol% or more and 20 mol% or less, 14 mol% or more and 24 mol% or less, 14 mol% or more and 23 mol% or less, 14 mol% or more and 22 mol% or less, 14 mol% or more and 21.5 mol% or less, 14 mol% or more and 21 mol% or less, 14 mol% or more and 20.5 mol% or less, 15 mol% or more and 24 mol% or less, 15 mol% or more and 23 mol% or less, 15 mol% or more and 22 mol% or less, 15 mol% or more and 21.5 mol% or less, 15 mol% or more and 21 mol% or less, 15 mol% or more and 20.5 mol% or less, 15 mol% or more and 20 mol% or less, 16 mol% or more and 24 mol% or less, 16 mol% or more and 23 mol% or less, 16 mol% or more and 22 mol% or less, 16 mol% or more and 21.5 mol% or less, 16 mol% or more and 21 mol% or less, 16 mol% or more and 20.5 mol% or less, or further or 16 mol% or more and 20 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0178] In a plurality of embodiments, Al2O3 in the glass composition and the colored glass article obtained therefrom 2 2O3 3 , the total of MgO, CaO, and ZnO can be 10 mol% or more, 11 mol% or more, or further or 12 mol% or more. In a plurality of embodiments, Al2O3 in the glass composition and the colored glass article obtained therefrom 2 2O3 3 , the total of MgO, CaO, and ZnO can be 30 mol% or less, 27 mol% or less, or further or 24 mol% or less. In a plurality of embodiments, Al2O3 in the glass composition and the colored glass article obtained therefrom 2 2O3 3The total of MgO, CaO, and ZnO is 10 mol% or more and 30 mol% or less, 10 mol% or more and 27 mol% or less, 10 mol% or more and 24 mol% or less, 11 mol% or more and 30 mol% or less, 11 mol% or more and 27 mol% or less, 11 mol% or more and 24 mol% or less, 12 mol% or more and 30 mol% or less, 12 mol% or more and 27 mol% or less, or further or 12 mol% or more and 24 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0179] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can optionally contain Cl. Cl can grow a specific crystal phase containing a colorant. For example, when Au is included in the set of colorants contained in the glass, it becomes possible to grow specific Au crystals by including Cl in the glass. In a plurality of embodiments, the concentration of Cl in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, or further or 0.1 mol% or more. In a plurality of embodiments, the concentration of Cl in the glass composition and the colored glass article obtained therefrom can be 0.5 mol% or less, or further or 0.25 mol% or less. In a plurality of embodiments, the concentration of Cl in the glass composition and the colored glass article obtained therefrom can be from 0 mol% to 0.5 mol%, from 0 mol% to 0.25 mol%, from 0.1 mol% to 0.5 mol%, or further or from 0.1 mol% to 0.25 mol%, or can be within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can also be substantially free of Cl or free of Cl. In embodiments where the set of colorants includes Ag, the halide (including Cl) contained in the glass composition and the colored glass article obtained therefrom is less than 100 ppm.

[0180] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom described herein can further contain ZrO 2 without wishing to be bound by theory, ZrO 2is considered to serve as a redox pair that supplies oxygen to a specific colorant (e.g., Au) during relatively low-temperature heat treatment, and can contribute to improving the residual rate of the colorant. Although not wishing to be bound by theory, it is presumed that similar behavior may occur with colorants other than Au. Also, ZrO 2 also functions as a co-colorant, enabling, for example, the production of red-colored glass articles. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain 0.01 mol% or more and 2 mol% or less of ZrO 2 In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain 0.01 mol% or more and 2 mol% or less of ZrO 2 In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain 0.1 mol% or more and 1.5 mol% or less of ZrO 2 In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain 0.25 mol% or more and 1.5 mol% or less of ZrO 2 In a plurality of embodiments, the concentration of ZrO 2 in the glass composition can be 0 mol% or more, 0.01 mol% or more, 0.1 mol% or more, or further 0.2 mol% or more. In a plurality of embodiments, the concentration of ZrO 2 in the glass composition can be 2 mol% or less, 1.5 mol% or less, 1 mol% or less, 0.75 mol% or less, or further 0.5 mol% or less. In a plurality of embodiments, the concentration of ZrO 2The concentration is 0 mol% or more and 2 mol% or less, 0 mol% or more and 1.5 mol% or less, 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.75 mol% or less, 0 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1.5 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.75 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.5 mol% or less, 0.2 mol% or more and 2 mol% or less, 0.2 mol% or more and 1.5 mol% or less, 0.2 mol% or more and 1 mol% or less, 0.2 mol% or more and 0.75 mol% or less, or further or 0.2 mol% or more and 0.5 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom do not substantially contain ZrO 2 or can be those that do not contain ZrO 2 .

[0181] In multiple embodiments, the glass composition and the colored glass article described herein can further contain Fe 2 O 3 . Fe 2 O 3 can also contribute to improving the residual rate of the colorant. Fe 2 O 3 is a polyvalent species that acts as a redox pair supplying oxygen to a specific colorant (e.g., Au) during heat treatment at a relatively low temperature and contributes to improving the residual rate of the colorant. Without wishing to be bound by theory, it is presumed that similar behavior can occur with colorants other than Au. Also, Fe 2 O 3 also functions as a colorant and enables, for example, the production of a pink or red colored glass article. In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain 0.01 mol% or more and 1 mol% or less of Fe 2 O 3 , or further or 0.1 mol% or more and 1 mol% or less of Fe 2 O 3can include. In multiple embodiments, Fe in the glass composition 2 O 3 The concentration of can be 0 mol% or more, 0.01 mol% or more, or further 0.1 mol% or more. In multiple embodiments, Fe in the glass composition 2 O 3 The concentration of can be 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, or further 0.25 mol% or less. In multiple embodiments, Fe in the glass composition 2 O 3 The concentration of can be from 0 mol% to 1 mol%, from 0 mol% to 0.75 mol%, from 0 mol% to 0.5 mol%, from 0 mol% to 0.25 mol%, from 0.01 mol% to 1 mol%, from 0.01 mol% to 0.75 mol%, from 0.01 mol% to 0.5 mol%, from 0.01 mol% to 0.25 mol%, from 0.05 mol% to 1 mol%, from 0.05 mol% to 0.75 mol%, from 0.05 mol% to 0.5 mol%, from 0.05 mol% to 0.25 mol%, from 0.1 mol% to 1 mol%, from 0.1 mol% to 0.75 mol%, from 0.1 mol% to 0.5 mol%, from 0.1 mol% to 0.25 mol%, or within any and all sub - ranges formed from the endpoints of these ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom are substantially free of Fe 2 O 3 or can be free of Fe 2 O 3 .

[0182] In multiple embodiments, Fe in the glass composition and the colored glass article obtained therefrom 2 O 3 The concentration of can be 0 mol% or more, 0.001 mol% or more, or further 0.005 mol% or more. In an embodiment, Fe in the glass composition and the colored glass article obtained therefrom 2 O 3The concentration can be 0.5 mol% or less, 0.1 mol% or less, 0.05 mol% or less, or further 0.01 mol% or less. In a plurality of embodiments, Fe in the glass composition and the colored glass article obtained therefrom 2 O 3 The concentration can be 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.1 mol% or less, 0 mol% or more and 0.05 mol% or less, 0 mol% or more and 0.01 mol% or less, 0.001 mol% or more and 0.5 mol% or less, 0.001 mol% or more and 0.1 mol% or less, 0.001 mol% or more and 0.05 mol% or less, 0.001 mol% or more and 0.01 mol% or less, 0.005 mol% or more and 0.5 mol% or less, 0.005 mol% or more and 0.1 mol% or less, 0.005 mol% or more and 0.05 mol% or less, or further 0.005 mol% or more and 0.01 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges.

[0183] In a plurality of embodiments, the glass composition described herein and the colored glass article obtained therefrom may further contain SnO 2 , Sb 2 O 3 , and / or Bi 2 O 3 Similar to MgO and ZnO, SnO 2 , Sb 2 O 3 , and Bi 2 O 3 can also contribute to lowering the melting point of the glass composition. Therefore, in order to lower the melting point and improve the residual rate of the colorant, SnO 2 , Sb 2 O 3 , and / or Bi 2 O 3 can also be included in the glass composition and the colored glass article obtained therefrom. In an embodiment where Ag is included in the colorant set, SnO 2 assists in the reduction of Ag in the glass, thereby forming silver particles in the glass. Without wishing to be bound by theory, in an embodiment where Au is included in the colorant set, SnO 2By adding this, the reduction of Au in the glass is also assisted, and thus it is considered that gold particles are formed. SnO 2 and / or Sb 2 O 3 In embodiments containing SnO 2 and / or Sb 2 O 3 can also function as a fining agent.

[0184] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain from 0.01 mol% to 1 mol% of SnO 2 In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain from 0.05 mol% to 0.75 mol% of SnO 2 , from 0.05 mol% to 0.5 mol% of SnO 2 , or further from 0.1 mol% to 0.25 mol% of SnO 2 In a plurality of embodiments, the concentration of SnO 2 in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.01 mol% or more, 0.05 mol% or more, or further 0.1 mol% or more. In a plurality of embodiments, the concentration of SnO 2 in the glass composition and the colored glass article obtained therefrom can be 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, or further 0.25 mol% or less. In a plurality of embodiments, the SnO 2The concentration is 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.75 mol% or less, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.25 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.75 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.25 mol% or less, 0.05 mol% or more and 1 mol% or less, 0.05 mol% or more and 0.75 mol% or less, 0.05 mol% or more and 0.5 mol% or less, 0.05 mol% or more and 0.25 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.5 mol% or less, or further 0.1 mol% or more and 0.25 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom are SnO 2 substantially free of, or can be free of SnO 2 .

[0185] In multiple embodiments, the concentration of Sb 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.01 mol% or more, 0.05 mol% or more, or further 0.1 mol% or more. In multiple embodiments, the concentration of Sb 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, or further 0.25 mol% or less. In multiple embodiments, the concentration of Sb 2 O 3The concentration is 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.75 mol% or less, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.25 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.75 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.25 mol% or less, 0.05 mol% or more and 1 mol% or less, 0.05 mol% or more and 0.75 mol% or less, 0.05 mol% or more and 0.5 mol% or less, 0.05 mol% or more and 0.25 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.5 mol% or less, or further or 0.1 mol% or more and 0.25 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom are Sb 2 O 3 substantially free of, or can be Sb 2 O 3 free of.

[0186] Also, the glass composition and the colored glass article obtained therefrom can include Bi 2 O 3 as an additional component of a set of colorants to achieve a desired color such as yellow. In a plurality of embodiments, the concentration of Bi 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.01 mol% or more, 0.05 mol% or more, or further or 0.1 mol% or more. In a plurality of embodiments, the concentration of Bi 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, or further or 0.25 mol% or less. In a plurality of embodiments, the concentration of Bi 2 O 3The concentration is 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.75 mol% or less, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.25 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.75 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.25 mol% or less, 0.05 mol% or more and 1 mol% or less, 0.05 mol% or more and 0.75 mol% or less, 0.05 mol% or more and 0.5 mol% or less, 0.05 mol% or more and 0.25 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.5 mol% or less, or further 0.1 mol% or more and 0.25 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom are Bi 2 O 3 substantially free of or can be free of Bi 2 O 3 .

[0187] The glass compositions and colored glass articles described herein can further include SO 3 as a fining agent. SO 3 is a fining agent that can be used without affecting the color or color stability of the colored glass article. In a plurality of embodiments, the concentration of SO 3 in the glass composition and the colored glass article obtained therefrom can be 0.1 mol% or less, 0.01 mol% or less, or further 0.001 mol% or less. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can be substantially free of SO 3 or can be free of SO 3 . In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can also include 0 mol% or more and 1 mol% or less of SO 3 .

[0188] Also, the glass composition and the colored glass article obtained therefrom can include WO 3It can also include. In multiple embodiments, in the glass composition and the colored glass article obtained therefrom, WO 3 The concentration can be 0 mol% or more and 1 mol% or less. For example, it can be 0 mol% or more and 0.5 mol% or less, more than 0 mol% and 0.1 mol% or less, 0.001 mol% or more and 0.01 mol% or less, and within all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can be substantially free of WO 3 or can be free of WO 3

[0189] Also, the glass composition and the colored glass article obtained therefrom can include Nb 2 O 5 as an additional component of the colorant set to achieve a desired color such as yellow. In multiple embodiments, the concentration of Nb 2 O 5 in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more and 1 mol% or less. For example, it can be 0 mol% or more and 0.5 mol% or less, more than 0 mol% and 0.1 mol% or less, 0.001 mol% or more and 0.01 mol% or less, and within all sub-ranges formed from each endpoint of these ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can be substantially free of Nb 2 O 5 or can be free of Nb 2 O 5

[0190] Also, the glass composition and the colored glass article can include MoO 3 as an additional component of the colorant set to achieve a desired color such as yellow. In multiple embodiments, the concentration of MoO 3 ​​The concentration can be 0 mol% or more and 1 mol% or less. For example, it can be 0 mol% or more and 0.5 mol% or less, more than 0 mol% and 0.1 mol% or less, 0.001 mol% or more and 0.01 mol% or less, and within all partial ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom do not substantially contain MoO 3 or can be made to not contain MoO 3 .

[0191] Also, the glass composition and the colored glass article can contain La 2 O 3 as an additional component of the colorant set for realizing a desired color such as yellow. In a plurality of embodiments, the concentration of La 2 O 3 in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more and 3 mol% or less. For example, it can be 0 mol% or more and 2 mol% or less, more than 0 mol% and 1 mol% or less, 0.001 mol% or more and 0.1 mol% or less, and within all partial ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article do not substantially contain La 2 O 3 or can be made to not contain La 2 O 3 .

[0192] In a plurality of embodiments, the glass composition described herein and the colored glass article obtained therefrom can further contain P 2 O 5 at a suppressed concentration, or can be made to not substantially contain P 2 O 5 or not contain P 2 O 5 . In embodiments containing P 2 O 5 , the ion exchange characteristics of the obtained colored glass article can be improved by P 2 O 5 . However, P 2 O 5When the concentration of [substance] increases (i.e., exceeds 1 mol%), the residual rate of one or more colorants contained in the colorant set may decrease. Although not wishing to be bound by theory, P 2 O 5 is considered to be more volatile than other glass network-forming substances such as SiO 2 , which may promote a decrease in the residual rate of the colorants contained in the colorant set. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may contain 0.1 mol% or more and 1 mol% or less of P 2 O 5 . In a plurality of embodiments, the concentration of P 2 O 5 in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.1 mol% or more, 0.25 mol% or more, or even 0.5 mol% or more. In a plurality of embodiments, the concentration of P 2 O 5 in the glass composition and the colored glass article obtained therefrom can be 1 mol% or less, or even 0.75 mol% or less. In a plurality of embodiments, the concentration of P 2 O 5 in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.25 mol% or more and 1 mol% or less, 0.25 mol% or more and 0.75 mol% or less, 0.5 mol% or more and 1 mol% or less, or even 0.5 mol% or more and 0.75 mol% or less, or within any and all sub-ranges formed from the endpoints of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may substantially not contain P 2 O 5 , or may not contain P 2 O 5 either.

[0193] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may contain 0 mol% or more and 3 mol% or less of P 2 O 5It can include. In multiple embodiments, P in the glass composition and the colored glass article obtained therefrom 2 O 5 The concentration can be 0 mol% or more, 0.1 mol% or more, 0.25 mol% or more, or further 0.5 mol% or more. In multiple embodiments, P in the glass composition and the colored glass article obtained therefrom 2 O 5 The concentration can be 3 mol% or less, 2 mol% or less, or further 1 mol% or less. In multiple embodiments, P in the glass composition and the colored glass article obtained therefrom 2 O 5 The concentration can be from 0 mol% to 3 mol%, from 0 mol% to 2 mol%, from 0 mol% to 1 mol%, from 0.1 mol% to 3 mol%, from 0.1 mol% to 2 mol%, from 0.1 mol% to 1 mol%, from 0.25 mol% to 3 mol%, from 0.25 mol% to 2 mol%, from 0.25 mol% to 1 mol%, from 0.5 mol% to 3 mol%, from 0.5 mol% to 2 mol%, or further from 0.5 mol% to 1 mol%, or within any and all sub-ranges formed from each endpoint of these ranges.

[0194] In the embodiments described herein, the glass composition and the colored glass article obtained therefrom further include at least one colorant as a colorant set that functions to impart a desired color to the resulting colored glass article. In multiple embodiments, the colorant set includes, as colorants included in the colorant set, Au, Ag, Cr 2 O 3 , transition metal oxides (e.g., CuO, NiO, Co 3 O 4 , TiO 2 , Cr 2 O 3 ), rare earth metal oxides (e.g., CeO 2 ), and / or at least one of combinations thereof. In multiple embodiments, the colorants included in the colorant set are Au, Ag, Cr 2 O 3 , transition metal oxides (e.g., CuO, NiO, Co3 O 4 、 TiO 2 、 Cr 2 O 3 )、 rare earth metal oxides (e.g., CeO 2 ), and combinations thereof. In embodiments, the glass composition and the colored glass article obtained therefrom may contain a colorant (i.e., the total of all colorants included in the colorant set) in an amount of 1×10 -6 mol% or more and 10 mol% or less. In a plurality of embodiments, the concentration of the colorant set in the glass composition and the colored glass article obtained therefrom is 1×10 -6 mol% or more and 9.5 mol% or less, 1×10 -6 mol% or more and 9 mol% or less, 1×10 -6 mol% or more and 8.5 mol% or less, 1×10 -6 mol% or more and 8 mol% or less, 1×10 -6 mol% or more and 7.5 mol% or less, 1×10 -6 mol% or more and 7 mol% or less, 1×10 -6 mol% or more and 6.5 mol% or less, 1×10 -6 mol% or more and 6 mol% or less, 1×10 -6 mol% or more and 5.5 mol% or less, 1×10 -6 mol% or more and 5 mol% or less, 1×10 -6 mol% or more and 4.5 mol% or less, 1×10 -6 mol% or more and 4 mol% or less, 1×10 -6 mol% or more and 3.5 mol% or less, 1×10 -6 mol% or more and 3 mol% or less, 1×10 -6 mol% or more and 2.5 mol% or less, 1×10 -6 mol% or more and 2 mol% or less, 1×10 -6 mol% or more and 1.5 mol% or less, 1×10 -6 mol% or more and 1 mol% or less, 1×10 -6Not less than 0.5 mol% and not more than x mol%, not less than 0.0005 mol% and not more than 10 mol%, not less than 0.0005 mol% and not more than 9.5 mol%, not less than 0.0005 mol% and not more than 9 mol%, not less than 0.0005 mol% and not more than 8.5 mol%, not less than 0.0005 mol% and not more than 8 mol%, not less than 0.0005 mol% and not more than 7.5 mol%, not less than 0.0005 mol% and not more than 7 mol%, not less than 0.0005 mol% and not more than 6.5 mol%, not less than 0.0005 mol% and not more than 6 mol%, not less than 0.0005 mol% and not more than 5.5 mol%, not less than 0.0005 mol% and not more than 5 mol%, not less than 0.0005 mol% and not more than 4.5 mol%, not less than 0.0005 mol% and not more than 4 mol%, not less than 0.0005 mol% and not more than 3.5 mol%, not less than 0.0005 mol% and not more than 3 mol%, not less than 0.0005 mol% and not more than 2.5 mol%, not less than 0.0005 mol% and not more than 2 mol%, not less than 0.0005 mol% and not more than 1.5 mol%, not less than 0.0005 mol% and not more than 1 mol%, not less than 0.0005 mol% and not more than 0.5 mol%, not less than 0.001 mol% and not more than 9.5 mol%, not less than 0.001 mol% and not more than 9 mol%, not less than 0.001 mol% and not more than 8.5 mol%, not less than 0.001 mol% and not more than 8 mol%, not less than 0.001 mol% and not more than 7.5 mol%, not less than 0.001 mol% and not more than 7 mol%, not less than 0.001 mol% and not more than 6.5 mol%, not less than 0.001 mol% and not more than 6 mol%, not less than 0.001 mol% and not more than 5.5 mol%, not less than 0.001 mol% and not more than 5 mol%, not less than 0.001 mol% and not more than 4.5 mol%, not less than 0.001 mol% and not more than 4 mol%, not less than 0.001 mol% and not more than 3.5 mol%, not less than 0.001 mol% and not more than 3 mol%, not less than 0.001 mol% and not more than 2.5 mol%, not less than 0.001 mol% and not more than 2 mol%, not less than 0.001 mol% and not more than 1.5 mol%, not less than 0.001 mol% and not more than 1 mol%, not less than 0.001 mol% and not more than 0.5 mol%, not less than 0.01 mol% and not more than 9.5 mol%, not less than 0.01 mol% and not more than 9 mol%, not less than 0.01 mol% and not more than 8.5 mol%, not less than 0.01 mol% and not more than 8 mol%, not less than 0.01 mol% and not more than 7.5 mol%, not less than 0.01 mol% and not more than 7 mol%, not less than 0.01 mol% and not more than 6.5 mol%, not less than 0.01 mol% and not more than 6 mol%, not less than 0.01 mol% and not more than 5.5 mol%, not less than 0.01 mol% and not more than 5 mol%, not less than 0.01 mol% and not more than 4.5 mol%, not less than 0.01 mol% and not more than 4 mol%, not less than 0.01 mol% and not more than 3.5 mol%, not less than 0.01 mol% and not more than 3 mol%, not less than 0.01 mol% and not more than 2.5 mol%, not less than 0.It can be in the range of 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1.5 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.5 mol% or less, or any and all sub-ranges formed from the respective endpoints of these ranges.

[0195] Colorant: Transition metal oxide and / or rare earth oxide In multiple embodiments, the set of colorants in the glass composition and the colored glass article obtained therefrom can include (or consist of) colorants that include transition metal oxides, rare earth oxides, or combinations thereof as colorants for achieving a desired color. In multiple embodiments, the transition metal oxides and / or rare earth oxides can be included in the glass composition as the sole colorant or in combination with other colorants. In multiple embodiments, the colorants based on transition metal oxides and / or rare earth oxides are NiO, Co 3 O 4 、Cr 2 O 3 、CuO, CeO 2 、TiO 2 、and / or combinations thereof. In multiple embodiments, the colorants based on transition metal oxides and / or rare earth oxides can further include oxides of V, Mn, Fe, Cu, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Cd, Hf, Ta, W, Re, Os, Ir, Pt, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, and Er.

[0196] In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain NiO + Co 3 O 4 + Cr 2 O 3 + CuO + CeO 2 + TiO 2 in an amount of 0.001 mol% or more, for example, in an amount of 0.001 mol% or more and 10 mol% or less. In multiple embodiments, NiO + Co 3 O 4 + Cr 2 O 3+CuO + CeO 2 +TiO 2 The concentration of is 0.001 mol% or more and 5 mol% or less, 0.001 mol% or more and 4 mol% or less, 0.001 mol% or more and 3 mol% or less, 0.001 mol% or more and 2.5 mol% or less, 0.001 mol% or more and 2 mol% or less, 0.001 mol% or more and 1.5 mol% or less, 0.01 mol% or more and 5 mol% or less, 0.01 mol% or more and 4 mol% or less, 0.01 mol% or more and 3 mol% or less, 0.01 mol% or more and 2.5 mol% or less, 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1.5 mol% or less, 0.02 mol% or more and 5 mol% or less, 0.02 mol% or more and 4 mol% or less, 0.02 mol% or more and 3 mol% or less, 0.02 mol% or more and 2.5 mol% or less, 0.02 mol% or more and 2 mol% or less, 0.02 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 5 mol% or less, 0.1 mol% or more and 4 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2.5 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1.5 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3 mol% or less, 0.5 mol% or more and 2.5 mol% or less, 0.5 mol% or more and 2 mol% or less, 0.5 mol% or more and 1.5 mol% or less, 0.7 mol% or more and 5 mol% or less, 0.7 mol% or more and 4 mol% or less, 0.7 mol% or more and 3 mol% or less, 0.7 mol% or more and 2.5 mol% or less, 0.7 mol% or more and 2 mol% or less, 0.7 mol% or more and 1.5 mol% or less, 0.9 mol% or more and 5 mol% or less, 0.9 mol% or more and 4 mol% or less, 0.9 mol% or more and 3 mol% or less, 0.9 mol% or more and 2.5 mol% or less, 0.9 mol% or more and 2 mol% or less, 0.9 mol% or more and 1.5 mol% or less, or can be within any and all sub - ranges formed from each endpoint of these ranges. In a plurality of embodiments, NiO, Co 3 O 4 、Cr 2 O 3 、CuO, CeO 2 、and / or TiO 2 in the glass composition and the colored glass article obtained therefrom can also be 0 mol%.

[0197] In multiple embodiments, the glass composition and the colored glass article obtained therefrom may contain NiO + Co 3 O 4 + Cr 2 O 3 + CuO at 0.001 mol% or more, for example, it can be contained at 0.001 mol% or more and 3 mol% or less. In multiple embodiments, NiO + Co in the glass composition and the colored glass article obtained therefrom 3 O 4 + Cr 2 O 3 + CuO concentration can be 0.001 mol% or more and 2.5 mol% or less, 0.001 mol% or more and 2 mol% or less, 0.001 mol% or more and 1.5 mol% or less, 0.001 mol% or more and 1 mol% or less, 0.001 mol% or more and 0.5 mol% or less, 0.001 mol% or more and 0.4 mol% or less, 0.01 mol% or more and 2.5 mol% or less, 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1.5 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.4 mol% or less, 0.02 mol% or more and 2.5 mol% or less, 0.02 mol% or more and 2 mol% or less, 0.02 mol% or more and 1.5 mol% or less, 0.02 mol% or more and 1 mol% or less, 0.02 mol% or more and 0.5 mol% or less, 0.02 mol% or more and 0.4 mol% or less, 0.1 mol% or more and 2.5 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 0.4 mol% or less, 0.2 mol% or more and 2.5 mol% or less, 0.2 mol% or more and 2 mol% or less, 0.2 mol% or more and 1.5 mol% or less, 0.2 mol% or more and 1 mol% or less, 0.2 mol% or more and 0.5 mol% or less, 0.2 mol% or more and 0.4 mol% or less, or can be within any and all sub - ranges formed from each endpoint of these ranges. In multiple embodiments, one or more of NiO, Co 3 O 4 , Cr 2 O 3 , and / or CuO in the glass composition and the colored glass article obtained therefrom can also be 0 mol%.

[0198] In multiple embodiments, the glass composition and the colored glass article obtained therefrom may contain 0 mol% or more of TiO 2 and, for example, may contain from 0 mol% or more to 2 mol% or less, or further from 0.01 mol% or more to 2 mol% or less of TiO 2 In multiple embodiments, the concentration of TiO 2 in the glass composition and the colored glass article obtained therefrom may be from 0 mol% or more to 2 mol% or less, from 0 mol% or more to 1.5 mol% or less, from 0 mol% or more to 1 mol% or less, from 0 mol% or more to 0.75 mol% or less, from 0 mol% or more to 0.5 mol% or less, from 0 mol% or more to 0.4 mol% or less, from 0.01 mol% or more to 2 mol% or less, from 0.01 mol% or more to 1.5 mol% or less, from 0.01 mol% or more to 1 mol% or less, from 0.01 mol% or more to 0.75 mol% or less, from 0.01 mol% or more to 0.5 mol% or less, from 0.01 mol% or more to 0.4 mol% or less, from 0.1 mol% or more to 2 mol% or less, from 0.1 mol% or more to 1.5 mol% or less, from 0.1 mol% or more to 1 mol% or less, from 0.1 mol% or more to 0.75 mol% or less, from 0.1 mol% or more to 0.5 mol% or less, from 0.1 mol% or more to 0.4 mol% or less, from 0.2 mol% or more to 2 mol% or less, from 0.2 mol% or more to 1.5 mol% or less, from 0.2 mol% or more to 1 mol% or less, from 0.2 mol% or more to 0.75 mol% or less, from 0.2 mol% or more to 0.5 mol% or less, from 0.2 mol% or more to 0.4 mol% or less, from 0.3 mol% or more to 2 mol% or less, from 0.3 mol% or more to 1.5 mol% or less, from 0.3 mol% or more to 1 mol% or less, from 0.3 mol% or more to 0.75 mol% or less, from 0.3 mol% or more to 0.5 mol% or less, from 0.3 mol% or more to 0.4 mol% or less, or may be within any and all sub-ranges formed from each endpoint of these ranges.

[0199] In multiple embodiments, the glass composition and the colored glass article obtained therefrom may contain 0.1 mol% or more of CeO 2 and, for example, may contain from 0.1 mol% or more to 2 mol% or less of CeO 2 In multiple embodiments, the CeO 2The concentration is 0.1 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 0.4 mol% or less, 0.2 mol% or more and 1.5 mol% or less, 0.2 mol% or more and 1 mol% or less, 0.2 mol% or more and 0.75 mol% or less, 0.2 mol% or more and 0.5 mol% or less, 0.2 mol% or more and 0.4 mol% or less, 0.3 mol% or more and 1.5 mol% or less, 0.3 mol% or more and 1 mol% or less, 0.3 mol% or more and 0.75 mol% or less, 0.3 mol% or more and 0.5 mol% or less, 0.3 mol% or more and 0.4 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom may contain more than 0 mol% and 2 mol% or less of CeO 2 and can contain.

[0200] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain NiO of 0 mol% or more, for example, can contain NiO of 0.01 mol% or more and 0.05 mol% or less. In a plurality of embodiments, the concentration of NiO in the glass composition and the colored glass article obtained therefrom is 0 mol% or more and 0.05 mol% or less, 0 mol% or more and 0.04 mol% or less, 0 mol% or more and 0.035 mol% or less, 0 mol% or more and 0.03 mol% or less, 0 mol% or more and 0.025 mol% or less, 0 mol% or more and 0.02 mol% or less, 0 mol% or more and 0.015 mol% or less, 0.01 mol% or more and 0.05 mol% or less, 0.01 mol% or more and 0.04 mol% or less, 0.01 mol% or more and 0.035 mol% or less, 0.01 mol% or more and 0.03 mol% or less, 0.01 mol% or more and 0.025 mol% or less, 0.01 mol% or more and 0.02 mol% or less, 0.01 mol% or more and 0.015 mol% or less, 0.015 mol% or more and 0.05 mol% or less, 0.015 mol% or more and 0.04 mol% or less, 0.015 mol% or more and 0.035 mol% or less, 0.015 mol% or more and 0.03 mol% or less, 0.015 mol% or more and 0.025 mol% or less, or further 0.015 mol% or more and 0.02 mol% or less, and can be within all sub-ranges formed from each endpoint of these ranges.

[0201] In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain 0 mol% or more of CuO. For example, it can contain 0.1 mol% or more and 0.5 mol% or less of CuO. In multiple embodiments, the concentration of CuO in the glass composition and the colored glass article obtained therefrom can be 0.1 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 0.4 mol% or less, 0.1 mol% or more and 0.35 mol% or less, 0.1 mol% or more and 0.3 mol% or less, 0.1 mol% or more and 0.25 mol% or less, 0.1 mol% or more and 0.2 mol% or less, 0.1 mol% or more and 0.15 mol% or less, 0.15 mol% or more and 0.5 mol% or less, 0.15 mol% or more and 0.4 mol% or less, 0.15 mol% or more and 0.35 mol% or less, 0.15 mol% or more and 0.3 mol% or less, 0.15 mol% or more and 0.25 mol% or less, or further 0.15 mol% or more and 0.2 mol% or less, and can be within all sub-ranges formed from each endpoint of these ranges.

[0202] In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain 0 mol% or more of Co 3 O 4 and can contain, for example, 0.0001 mol% or more and 0.01 mol% or less of Co 3 O 4 In multiple embodiments, Co 3 O 4The concentration is 0 mol% or more and 0.01 mol% or less, 0 mol% or more and 0.0095 mol% or less, 0 mol% or more and 0.009 mol% or less, 0 mol% or more and 0.0085 mol% or less, 0 mol% or more and 0.0075 mol% or less, 0 mol% or more and 0.007 mol% or less, 0 mol% or more and 0.0065 mol% or less, 0 mol% or more and 0.006 mol% or less, 0 mol% or more and 0.0055 mol% or less, 0 mol% or more and 0.005 mol% or less, 0 mol% or more and 0.0045 mol% or less, 0 mol% or more and 0.004 mol% or less, 0 mol% or more and 0.0035 mol% or less, 0 mol% or more and 0.003 mol% or less, 0 mol% or more and 0.0025 mol% or less, 0 mol% or more and 0.002 mol% or less, 0.0001 mol% or more and 0.01 mol% or less, 0.0001 mol% or more and 0.0095 mol% or less, 0.0001 mol% or more and 0.009 mol% or less, 0.0001 mol% or more and 0.0085 mol% or less, 0.0001 mol% or more and 0.0075 mol% or less, 0.0001 mol% or more and 0.007 mol% or less, 0.0001 mol% or more and 0.0065 mol% or less, 0.0001 mol% or more and 0.006 mol% or less, 0.0001 mol% or more and 0.0055 mol% or less, 0.0001 mol% or more and 0.005 mol% or less, 0.0001 mol% or more and 0.0045 mol% or less, 0.0001 mol% or more and 0.004 mol% or less, 0.0001 mol% or more and 0.0035 mol% or less, 0.0001 mol% or more and 0.003 mol% or less, 0.0001 mol% or more and 0.0025 mol% or less, 0.0001 mol% or more and 0.002 mol% or less, 0.001 mol% or more and 0.01 mol% or less, 0.001 mol% or more and 0.0095 mol% or less, 0.001 mol% or more and 0.009 mol% or less, 0.001 mol% or more and 0.0085 mol% or less, 0.001 mol% or more and 0.0075 mol% or less, 0.001 mol% or more and 0.007 mol% or less, 0.001 mol% or more and 0.0065 mol% or less, 0.001 mol% or more and 0.006 mol% or less, 0.001 mol% or more and 0.0055 mol% or less, 0.001 mol% or more and 0.005 mol% or less, 0.001 mol% or more and 0.0045 mol% or less, 0.001 mol% or more and 0.004 mol% or less, 0.001 mol% or more and 0.0035 mol% or less, 0.001 mol% or more and 0.003 mol% or less, 0.001 mol% or more and 0.0025 mol% or less, 0.001 mol% or more and 0.0.02 mol% or less, and can be within all sub-ranges formed from each endpoint of these ranges.

[0203] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain Cr at 0 mol% or more 2 O 3 For example, it can contain Cr at 0.01 mol% or more and 0.05 mol% or less 2 O 3 In a plurality of embodiments, the concentration of Cr 2 O 3 in the glass composition and the colored glass article obtained therefrom is 0 mol% or more and 0.05 mol% or less, 0 mol% or more and 0.04 mol% or less, 0 mol% or more and 0.035 mol% or less, 0 mol% or more and 0.03 mol% or less, 0 mol% or more and 0.025 mol% or less, 0 mol% or more and 0.02 mol% or less, 0 mol% or more and 0.015 mol% or less, 0.01 mol% or more and 0.05 mol% or less, 0.01 mol% or more and 0.04 mol% or less, 0.01 mol% or more and 0.035 mol% or less, 0.01 mol% or more and 0.03 mol% or less, 0.01 mol% or more and 0.025 mol% or less, 0.01 mol% or more and 0.02 mol% or less, 0.01 mol% or more and 0.015 mol% or less, 0.015 mol% or more and 0.05 mol% or less, 0.015 mol% or more and 0.04 mol% or less, 0.015 mol% or more and 0.035 mol% or less, 0.015 mol% or more and 0.03 mol% or less, 0.015 mol% or more and 0.025 mol% or less, or further 0.015 mol% or more and 0.02 mol% or less, and can be within all sub-ranges formed from each endpoint of these ranges.

[0204] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain NiO + Co at 0.001 mol% or more 3 O 4 + Cr 2 O 3 + CuO, for example, NiO + Co at 0.001 mol% or more and 3 mol% or less 3 O 4 + Cr 2 O 3 + CuO (or NiO + Co described in this specification 3 O4 +Cr 2 O 3 Either in the range of +CuO), and CeO of 0.1 mol% or more 2 , for example, CeO of 0.1 mol% or more and 1.5 mol% or less 2 (Or, CeO described in this specification 2 Any of the ranges), and TiO of 0.1 mol% or more 2 , for example, TiO of 0.1 mol% or more and 2 mol% or less 2 (Or, TiO described in this specification 2 Any of the ranges) can include at least one of them.

[0205] The glass composition and the colored glass article obtained therefrom can contain TiO sufficient to obtain the desired yellow 2 +CeO 2 In a plurality of embodiments, TiO in the glass composition and the colored glass article obtained therefrom 2 +CeO 2 The concentration can be 0.2 mol% or more, 0.3 mol% or more, 0.4 mol% or more, 0.5 mol% or more, 0.6 mol% or more, 0.7 mol% or more, 0.8 mol% or more, or more than 0.8 mol%. In a plurality of embodiments, TiO in the glass composition and the colored glass article obtained therefrom 2 +CeO 2 The concentration can be 3 mol% or less, 2.5 mol% or less, 2 mol% or less, 1.5 mol% or less, 1 mol% or less, or less than 1 mol%. In a plurality of embodiments, TiO in the glass composition and the colored glass article obtained therefrom 2 +CeO 2 The concentration can be 0.2 mol% or more and 3 mol% or less, for example, 0.3 mol% or more and 2.5 mol% or less, 0.4 mol% or more and 2 mol% or less, 0.5 mol% or more and 2.0 mol% or less, 0.5 mol% or more and 1.5 mol% or less, 0.6 mol% or more and 1 mol% or less, 0.7 mol% or more and 0.9 mol% or less, 0.8 mol% or more and 1.5 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges.

[0206] In multiple embodiments, the glass composition and the colored glass article obtained therefrom may include at least one of Er 2 O 3 and Nd 2 O 3 as a colorant to obtain a desired color. By including Er 2 O 3 and Nd 2 O 3 in the glass composition, colors that are difficult to achieve with other transition metal colorants can be achieved. Also, unlike some glasses that use Au, Ag, or Cu as colorants, there is no need to perform a heat treatment to achieve the desired color after the forming process. Er 2 O 3 and Nd 2 O 3 can also be combined with other colorants for color adjustment of the colored glass article.

[0207] In multiple embodiments, the glass composition and the colored glass article obtained therefrom may include Er 2 O 3 in an amount of 0 mol% or more and 4 mol% or less, for example, more than 0 mol% and 4 mol% or less, or in an amount of 0.1 mol% or more and 2 mol% or less. In multiple embodiments, the glass composition and the colored glass article obtained therefrom may include Er 2 O 3 in an amount of 0 mol% or more, more than 0 mol%, 0.1 mol% or more, 0.2 mol% or more, 0.5 mol% or more, 1 mol% or more, or more than 1 mol%. In multiple embodiments, the glass composition and the colored glass article obtained therefrom may include Er 2 O 3 in an amount of 4 mol% or less, 3 mol% or less, 2 mol% or less, 1 mol% or less, 0.5 mol% or less, or less than 0.5 mol%. In multiple embodiments, the glass composition and the colored glass article obtained therefrom may include Er 2 O 3is included in an amount of 0 mol% or more and 4 mol% or less, more than 0 mol% and 3.5 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.2 mol% or more and 2.5 mol% or less, 0.3 mol% or more and 2 mol% or less, 0.4 mol% or more and 1.9 mol% or less, 0.5 mol% or more and 1.8 mol% or less, 0.6 mol% or more and 1.7 mol% or less, 0.7 mol% or more and 1.6 mol% or less, 0.8 mol% or more and 1.5 mol% or less, 0.9 mol% or more and 1.4 mol% or less, 1.0 mol% or more and 1.3 mol% or less, 1.1 mol% or more and 1.2 mol% or less, or in an amount within any and all sub-ranges formed from the endpoints of the above ranges. In multiple embodiments, the glass composition and the colored glass article obtained therefrom are Er 2 O 3 substantially free of or may be free of Er 2 O 3 .

[0208] In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain Nd 2 O 3 in an amount of 0 mol% or more and 4 mol% or less, for example, more than 0 mol% and 4 mol% or less, or in an amount of 0.1 mol% or more and 3 mol% or less. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Nd 2 O 3 in an amount of 0 mol% or more, more than 0 mol%, 0.1 mol% or more, 0.2 mol% or more, 0.5 mol% or more, 1 mol% or more, or more than 1 mol%. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Nd 2 O 3 in an amount of 4 mol% or less, 3 mol% or less, 2 mol% or less, 1 mol% or less, 0.5 mol% or less, or less than 0.5 mol%. In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain Nd 2 O 3is included in an amount of 0 mol% or more and 4 mol% or less, more than 0 mol% and 3.5 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.2 mol% or more and 2.5 mol% or less, 0.3 mol% or more and 2 mol% or less, 0.4 mol% or more and 1.9 mol% or less, 0.5 mol% or more and 1.8 mol% or less, 0.6 mol% or more and 1.7 mol% or less, 0.7 mol% or more and 1.6 mol% or less, 0.8 mol% or more and 1.5 mol% or less, 0.9 mol% or more and 1.4 mol% or less, 1.0 mol% or more and 1.3 mol% or less, 1.1 mol% or more and 1.2 mol% or less, or in an amount within any and all sub-ranges formed from the endpoints of the above ranges. In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain Nd 2 O 3 substantially free of, or can be made free of Nd 2 O 3 .

[0209] Colorant: Gold In a plurality of embodiments, the colorant set in the glass composition and the colored glass article obtained therefrom can include (or consist of) Au as a colorant to achieve a desired color. In a plurality of embodiments, Au can be included in the glass composition as the sole colorant or in combination with other colorants. As described herein, in a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can be formulated to increase the retention rate of Au so that the color gamut achievable in the resulting colored glass article is widened.

[0210] In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Au in an amount greater than 0.0005 mol% and less than or equal to 1 mol%. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Au in an amount greater than 0.001 mol% and less than or equal to 0.5 mol%. In multiple embodiments, the concentration of Au in the glass composition and the colored glass article obtained therefrom can be 0.0005 mol% or more, 0.001 mol% or more, 0.002 mol% or more, 0.005 mol% or more, or further 0.01 mol% or more. In multiple embodiments, the concentration of Au in the glass composition and the colored glass article obtained therefrom can be 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, 0.25 mol% or less, 0.1 mol% or less, or further 0.05 mol% or less.In multiple embodiments, the concentration of Au in the glass composition and the colored glass article obtained therefrom can be 0.0005 mol% or more and 1 mol% or less, 0.0005 mol% or more and 0.75 mol% or less, 0.0005 mol% or more and 0.5 mol% or less, 0.0005 mol% or more and 0.25 mol% or less, 0.0005 mol% or more and 0.1 mol% or less, 0.0005 mol% or more and 0.05 mol% or less, 0.001 mol% or more and 1 mol% or less, 0.001 mol% or more and 0.75 mol% or less, 0.001 mol% or more and 0.5 mol% or less, 0.001 mol% or more and 0.25 mol% or less, 0.001 mol% or more and 0.1 mol% or less, 0.001 mol% or more and 0.05 mol% or less, 0.002 mol% or more and 1 mol% or less, 0.002 mol% or more and 0.75 mol% or less, 0.002 mol% or more and 0.5 mol% or less, 0.002 mol% or more and 0.25 mol% or less, 0.002 mol% or more and 0.1 mol% or less, 0.002 mol% or more and 0.05 mol% or less, 0.005 mol% or more and 1 mol% or less, 0.005 mol% or more and 0.75 mol% or less, 0.005 mol% or more and 0.5 mol% or less, 0.005 mol% or more and 0.25 mol% or less, 0.005 mol% or more and 0.1 mol% or less, 0.005 mol% or more and 0.05 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.75 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.25 mol% or less, 0.01 mol% or more and 0.1 mol% or less, or further or 0.01 mol% or more and 0.05 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0211] In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Au at 1×10 -6 mol% or more and 1 mol% or less. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Au at 1×10 -6 mol% or more and 0.01 mol% or less. In multiple embodiments, the concentration of Au in the glass composition and the colored glass article obtained therefrom is 1×10 -6 mol% or more, 1×10 -5It can be set to 1 mol% or more, 0.0001 mol% or more, 0.0005 mol% or more, or further 0.001 mol% or more. In a plurality of embodiments, the concentration of Au in the glass composition and the colored glass article obtained therefrom can be 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, 0.25 mol% or less, 0.1 mol% or less, 0.05 mol% or less, or further 0.01 or less. In a plurality of embodiments, the concentration of Au in the glass composition and the colored glass article obtained therefrom is 1×10 -6 mol% or more and 0.75 mol% or less, 1×10 -6 mol% or more and 0.5 mol% or less, 1×10 -6 mol% or more and 0.25 mol% or less, 1×10 -6 mol% or more and 0.1 mol% or less, 1×10 -6 mol% or more and 0.05 mol% or less, 1×10 -6 mol% or more and 0.01 mol% or less, 1×10 -5 mol% or more and 1 mol% or less, 1×10 -5 mol% or more and 0.75 mol% or less, 1×10 -5 mol% or more and 0.5 mol% or less, 1×10 -5 mol% or more and 0.25 mol% or less, 1×10 -5 mol% or more and 0.1 mol% or less, 1×10 -5 mol% or more and 0.05 mol% or less, 1×10 -5not less than 0.01 mol% and not more than 1 mol%, not less than 0.0001 mol% and not more than 1 mol%, not less than 0.0001 mol% and not more than 0.75 mol%, not less than 0.0001 mol% and not more than 0.5 mol%, not less than 0.0001 mol% and not more than 0.25 mol%, not less than 0.0001 mol% and not more than 0.1 mol%, not less than 0.0001 mol% and not more than 0.05 mol%, not less than 0.0001 mol% and not more than 0.01 mol%, not less than 0.0005 mol% and not more than 1 mol%, not less than 0.0005 mol% and not more than 0.75 mol%, not less than 0.0005 mol% and not more than 0.5 mol%, not less than 0.0005 mol% and not more than 0.25 mol%, not less than 0.0005 mol% and not more than 0.1 mol%, not less than 0.0005 mol% and not more than 0.05 mol%, not less than 0.0005 mol% and not more than 0.01 mol%, not less than 0.001 mol% and not more than 1 mol%, not less than 0.001 mol% and not more than 0.75 mol%, not less than 0.001 mol% and not more than 0.5 mol%, not less than 0.001 mol% and not more than 0.25 mol%, not less than 0.001 mol% and not more than 0.1 mol%, not less than 0.001 mol% and not more than 0.05 mol%, or further not less than 0.001 mol% and not more than 0.01 mol%, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0212] By including a secondary colorant in addition to Au, different color gamuts can also be realized. For example, if at least one of F, Cl, Br, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Se, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Te, W, Ir, Pt, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, and Er is denoted as "M", in a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can contain 0 mol% or more and 1 mol% or less of the cation "M".

[0213] Colorant: Cr 2 O 3 In a plurality of embodiments, the set of colorants used in the glass composition and the colored glass article obtained therefrom described herein includes, as a colorant for realizing a desired color, Cr 2 O 3 (or Cr 2 O 3can consist of). In multiple embodiments, Cr 2 O 3 can be included in the glass composition either as the sole colorant or in combination with other colorants. For example, in embodiments where Cr 2 O 3 is used as a colorant, other transition metal oxides can also be included in the glass composition to correct the color imparted to the glass. Such other transition metal oxides include, for example, CuO, NiO, and / or Co 3 O 4 , but are not limited thereto. As described herein, in multiple embodiments, the solubility of Cr 2 O 3 is increased so that the color gamut achievable in the resulting colored glass article is broadened, and the glass composition and the resulting colored glass article can be formulated.

[0214] In multiple embodiments, the glass composition and the resulting colored glass article can contain 0 mol% or more and 2 mol% or less of Cr 2 O 3 . In multiple embodiments, the glass composition and the resulting colored glass article can contain 0.001 mol% or more and 1.5 mol% or less of Cr 2 O 3 . In multiple embodiments, the concentration of Cr 2 O 3 in the glass composition and the resulting colored glass article can be 0 mol% or more, 0.001 mol% or more, 0.005 mol% or more, 0.01 mol% or more, or further 0.05 mol% or more. In multiple embodiments, the concentration of Cr 2 O 3 in the glass composition and the resulting colored glass article can be 2 mol% or less, 1.5 mol% or less, 1 mol% or less, 0.5 mol% or less, or further 0.1 mol% or less. In multiple embodiments, the concentration of Cr 2 O 3The concentration can be 0 mol% or more and 2 mol% or less, 0 mol% or more and 1.5 mol% or less, 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.1 mol% or less, 0.001 mol% or more and 2 mol% or less, 0.001 mol% or more and 1.5 mol% or less, 0.001 mol% or more and 1 mol% or less, 0.001 mol% or more and 0.5 mol% or less, 0.001 mol% or more and 0.1 mol% or less, 0.005 mol% or more and 2 mol% or less, 0.005 mol% or more and 1.5 mol% or less, 0.005 mol% or more and 1 mol% or less, 0.005 mol% or more and 0.5 mol% or less, 0.005 mol% or more and 0.1 mol% or less, 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1.5 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.1 mol% or less, 0.05 mol% or more and 2 mol% or less, 0.05 mol% or more and 1.5 mol% or less, 0.05 mol% or more and 1 mol% or less, 0.05 mol% or more and 0.5 mol% or less, or further or 0.05 mol% or more and 0.1 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0215] In an embodiment where the colorant set includes Cr as a colorant 2 O 3 in order to increase the solubility of Cr 2 O 3 and prevent the formation of Cr spinel crystals, the glass composition and the colored glass article obtained therefrom are made over-alkaline (i.e., R 2 O (mol%) + R'O (mol%) - Al 2 O 3 (mol%) is 0.5 mol% or more). However, if there is still an excessive amount of alkali in the glass composition even after balancing the charge of Al 2 O 3 , non-bridging oxygen may be formed around SiO 2 by this alkali, which may reduce the fracture toughness. Therefore, in a plurality of embodiments, in order to prevent a decrease in fracture toughness, R 2 O + R'O - Al 2 O 3 in the glass composition and the colored glass article obtained therefrom can be restricted (for example, made 6 mol% or less).

[0216] In multiple embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O + R'O - Al 2 O 3 can be 0.5 mol% or more and 6 mol% or less. In multiple embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O + R'O - Al 2 O 3 can be 1 mol% or more and 5.5 mol% or less. In multiple embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O + R'O - Al 2 O 3 can be 0.5 mol% or more, 1 mol% or more, 1.5 mol% or more, or further 2 mol% or more. In multiple embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O + R'O - Al 2 O 3 can be 6 mol% or less, 5.5 mol% or less, 5 mol% or less, 4.5 mol% or less, 4 mol% or less, 3.5 mol% or less, or further 3 mol% or less. In multiple embodiments, R in the glass composition and the colored glass article obtained therefrom 2 O + R'O - Al 2 O 3is 0.5 mol% or more and 6 mol% or less, 0.5 mol% or more and 5.5 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4.5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3.5 mol% or less, 0.5 mol% or more and 3 mol% or less, 1 mol% or more and 6 mol% or less, 1 mol% or more and 5.5 mol% or less, 1 mol% or more and 5 mol% or less, 1 mol% or more and 4.5 mol% or less, 1 mol% or more and 4 mol% or less, 1 mol% or more and 3.5 mol% or less, 1 mol% or more and 3 mol% or less, 1.5 mol% or more and 6 mol% or less, 1.5 mol% or more and 5.5 mol% or less, 1.5 mol% or more and 5 mol% or less, 1.5 mol% or more and 4.5 mol% or less, 1.5 mol% or more and 4 mol% or less, 1.5 mol% or more and 3.5 mol% or less, 1.5 mol% or more and 3 mol% or less, 2 mol% or more and 6 mol% or less, 2 mol% or more and 5.5 mol% or less, 2 mol% or more and 5 mol% or less, 2 mol% or more and 4.5 mol% or less, 2 mol% or more and 4 mol% or less, 2 mol% or more and 3.5 mol% or less, or further or 2 mol% or more and 3 mol% or less, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0217] In embodiments where the colorant set includes Cr as a colorant 2 O 3 the glass composition and the colored glass article obtained therefrom may satisfy at least one of the following conditions: (1) Al 2 O 3 is 17.5 mol% or less and / or R 2 O + R'O - Al 2 O 3 is 0.5 mol% or more; (2) Al 2 O 3 + MgO + ZnO is 22 mol% or less; and (3) MgO + ZnO is 4.5 mol% or less, so as to achieve the desired color.

[0218] In embodiments where the colorant includes Cr 2 O 3 different color gamuts can also be achieved by including other colorants in addition to Cr 2 O 3 . For example, in a plurality of embodiments, the glass composition and the colored glass article obtained therefrom are Cr 2O 3 In addition, it can contain NiO, Co 3 O 4 , CuO, or a combination thereof.

[0219] In multiple embodiments, the glass composition and the colored glass article obtained therefrom are Cr 2 O 3 In addition, it can contain 0 mol% or more and 4 mol% or less of NiO as a colorant. In multiple embodiments, the concentration of NiO in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.01 mol% or more, or further 0.05 mol% or more. In multiple embodiments, the concentration of NiO in the glass composition and the colored glass article obtained therefrom can be 4 mol% or less, 3 mol% or less, 2 mol% or less, 1 mol% or less, 0.5 mol% or less, 0.25 mol% or less, or further 0.1 mol% or less. In multiple embodiments, the concentration of NiO in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more and 4 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.5 mol% or less, 0 mol% or more and 0.25 mol% or less, 0 mol% or more and 0.1 mol% or less, 0.01 mol% or more and 4 mol% or less, 0.01 mol% or more and 3 mol% or less, 0.01 mol% or more and 2 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.25 mol% or less, 0.01 mol% or more and 0.1 mol% or less, 0.05 mol% or more and 4 mol% or less, 0.05 mol% or more and 3 mol% or less, 0.05 mol% or more and 2 mol% or less, 0.05 mol% or more and 1 mol% or less, 0.05 mol% or more and 0.5 mol% or less, 0.05 mol% or more and 0.25 mol% or less, or further 0.05 mol% or more and 0.1 mol% or less, or can be within any and all sub-ranges formed between the endpoints of these ranges.

[0220] In multiple embodiments, the glass composition and the colored glass article obtained therefrom are Cr 2 O 3 In addition, it can contain 0 mol% or more and 2 mol% or less of Co as a colorant 3O 4 can include. In multiple embodiments, Co in the glass composition and the colored glass article obtained therefrom 3 O 4 The concentration of can be 0 mol% or more, 0.001 mol% or more, 0.005 mol% or more, or further 0.01 mol% or more. In multiple embodiments, Co in the glass composition and the colored glass article obtained therefrom 3 O 4 The concentration of can be 2 mol% or less, 1.5 mol% or less, 1 mol% or less, 0.5 mol% or less, 0.1 mol% or less, or further 0.05 mol% or less. In multiple embodiments, Co in the glass composition and the colored glass article obtained therefrom 3 O 4 The concentration of can be from 0 mol% to 2 mol%, from 0 mol% to 1.5 mol%, from 0 mol% to 1 mol%, from 0 mol% to 0.5 mol%, from 0 mol% to 0.1 mol%, from 0 mol% to 0.05 mol%, from 0.001 mol% to 2 mol%, from 0.001 mol% to 1.5 mol%, from 0.001 mol% to 1 mol%, from 0.001 mol% to 0.5 mol%, from 0.001 mol% to 0.1 mol%, from 0.001 mol% to 0.05 mol%, from 0.005 mol% to 2 mol%, from 0.005 mol% to 1.5 mol%, from 0.005 mol% to 1 mol%, from 0.005 mol% to 0.5 mol%, from 0.005 mol% to 0.1 mol%, from 0.005 mol% to 0.05 mol%, from 0.01 mol% to 2 mol%, from 0.01 mol% to 1.5 mol%, from 0.01 mol% to 1 mol%, from 0.01 mol% to 0.5 mol%, from 0.01 mol% to 0.1 mol%, or further from 0.01 mol% to 0.05 mol%, or within any and all sub-ranges formed from each endpoint of these ranges.

[0221] In multiple embodiments, the glass composition and the colored glass article obtained therefrom are Cr 2 O 3In addition, it can contain 0 mol% or more and 5 mol% or less of CuO as a colorant. In a plurality of embodiments, the concentration of CuO in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more, 0.05 mol% or more, 0.1 mol% or more, 0.5 mol% or more, or further 1 mol% or more. In a plurality of embodiments, the concentration of CuO in the glass composition and the colored glass article obtained therefrom can be 5 mol% or less, 4 mol% or less, 3 mol% or less, or further 2 mol% or less. In a plurality of embodiments, the concentration of CuO in the glass composition and the colored glass article obtained therefrom can be 0 mol% or more and 5 mol% or less, 0 mol% or more and 4 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2 mol% or less, 0.05 mol% or more and 5 mol% or less, 0.05 mol% or more and 4 mol% or less, 0.05 mol% or more and 3 mol% or less, 0.05 mol% or more and 2 mol% or less, 0.1 mol% or more and 5 mol% or less, 0.1 mol% or more and 4 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.5 mol% or more and 5 mol% or less, 0.5 mol% or more and 4 mol% or less, 0.5 mol% or more and 3 mol% or less, 0.5 mol% or more and 2 mol% or less, 1 mol% or more and 5 mol% or less, 1 mol% or more and 4 mol% or less, 1 mol% or more and 3 mol% or less, or further 1 mol% or more and 2 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges.

[0222] Colorant: Silver In a plurality of embodiments, the set of colorants used in the glass composition and the colored glass article obtained therefrom can include (or consist of) Ag as a colorant to achieve the desired color. As described herein, in a plurality of embodiments, the glass composition and the colored glass article obtained therefrom can be formulated so as to increase the residual rate of Ag and broaden the color gamut achievable in the resulting colored glass article. In a plurality of embodiments, Ag can be included in the glass composition as the sole colorant or in combination with other colorants. In embodiments where Ag is used in the glass composition as a colorant, anisotropic silver particles are formed by reduction of silver ions in the glass composition, and the colored glass article develops color due to the presence of these anisotropic silver particles.

[0223] Thus, in multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Ag in an amount of 0.01 mol% or more and 5 mol% or less. In multiple embodiments, the glass composition and the colored glass article obtained therefrom can contain Ag in an amount of 0.05 mol% or more and 2.5 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.5 mol% or less, or 0.1 mol% or more and 0.25 mol% or less. In multiple embodiments, the concentration of Ag in the glass composition and the colored glass article obtained therefrom can be 0.01 mol% or more, 0.05 mol% or more, or 0.1 mol% or more. In multiple embodiments, the concentration of Ag in the glass composition and the colored glass article obtained therefrom can be 5 mol% or less, 2.5 mol% or less, 1 mol% or less, 0.75 mol% or less, 0.5 mol% or less, or 0.25 mol% or less. In multiple embodiments, the concentration of Ag in the glass composition and the colored glass article obtained therefrom can be 0.01 mol% or more and 5 mol% or less, 0.01 mol% or more and 2.5 mol% or less, 0.01 mol% or more and 1 mol% or less, 0.01 mol% or more and 0.75 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.01 mol% or more and 0.5 mol% or less, 0.05 mol% or more and 5 mol% or less, 0.05 mol% or more and 2.5 mol% or less, 0.05 mol% or more and 1 mol% or less, 0.05 mol% or more and 0.75 mol% or less, 0.05 mol% or more and 0.5 mol% or less, 0.05 mol% or more and 0.25 mol% or less, 0.1 mol% or more and 5 mol% or less, 0.1 mol% or more and 2.5 mol% or less, 0.1 mol% or more and 1 mol% or less, 0.1 mol% or more and 0.75 mol% or less, 0.1 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 0.25 mol% or less, or within any and all sub-ranges formed from the endpoints of these ranges.

[0224] In the case of a conventional colored glass article that does not contain a halide and contains silver, the colors that develop by performing appropriate heat treatment in the as-formed state (i.e., the state of the colored glass article before mechanical stretching) are only yellow, orange, and red. In a conventional colored glass article that does not contain a halide, these colors develop due to the formation of isotropic (nominal shape is spherical) silver particles. This isotropic silver particle causes a single localized surface plasmon resonance. The isotropic particle shape is the shape that is most favorably formed energetically because the ratio of the surface area to the volume is the smallest. Therefore, the shape of the silver particles most commonly observed in a colored glass article containing silver is an isotropic silver particle.

[0225] In contrast, in the case of a colored glass article containing anisotropic silver particles, it becomes possible to develop a wider range of colors such as pink, purple, blue, green, brown, and black. In this specification, anisotropic silver particles refer to silver particles whose aspect ratio (i.e., the ratio of the longest dimension of the particle to the shortest dimension of the particle) is greater than 1 (for example, the ratio of the length of the particle to the width of the particle is greater than 1), and this point is different from isotropic silver particles whose aspect ratio is 1. The reason why the color development range of the glass containing anisotropic silver particles is wide is that the anisotropic silver particles cause two different plasmon modes, a high-energy transverse mode and a low-energy longitudinal mode. Incidentally, these two different plasmon modes can be observed in the absorption spectrum of the colored glass article, and when anisotropic silver particles are present in the glass, usually at least two different peaks appear in the absorption spectrum of the colored glass article. By changing the aspect ratio of the anisotropic particles and adjusting the resonance absorption of these two plasmon modes, a color shift can be caused.

[0226] Conventionally, anisotropic metallic silver particles were formed in glass by using a mechanical stretching process to stretch spherical silver particles by shear force (for example, stretching a colored glass article by the re-draw method). By the mechanical stretching process, a glass article containing silver particles aligned parallel to each other along the stretching direction is obtained (that is, a polarizing glass).

[0227] Also, as a conventional method for forming anisotropic metal particles in a glass article instead of the mechanical stretching process, there is a method of incorporating a halide (for example, F, Cl, and Br) into a glass composition. In a colored glass article containing a halide, anisotropic silver particles are formed using elongated or pyramid-shaped halide crystals as a template. However, it may not be preferable to include a halide in the glass composition.

[0228] In contrast, in the case of a colored glass article containing Ag as a colorant described in this specification, a wide range of colors such as yellow, orange, red, green, pink, purple, brown, and black can be developed without including a halide in the glass composition or using a mechanical stretching process. Without being bound by a particular theory, it is considered that in the colored glass article of the present disclosure, anisotropic silver particles can be formed by a mechanism similar to template growth that occurs when a halide is included in the glass composition. However, instead of using a method of using a halide-containing crystal as a template or a method of mechanically stretching isotropic silver particles, by heat-treating the glass article in its as-molded state, anisotropic silver crystals are formed on nano-sized crystals of spodumene, lithium silicate, and / or β-quartz. It was accidentally discovered that, in addition to and / or instead of this, anisotropic silver particles are also considered to precipitate at the interface of the phase separation region and / or the region that is only partially crystallized in the colored glass article. Furthermore, these crystals and / or phase separation regions are also considered to be nucleation sites when anisotropic silver particles grow.

[0229] Accordingly, in multiple embodiments, the halide contained in the glass composition containing silver as a colorant and the colored glass article obtained therefrom can be less than 100 ppm (parts per million). For example, the halide contained in the glass composition containing Ag as a colorant and the colored glass article obtained therefrom can be less than 100 ppm, and can be, for example, less than 50 ppm, less than 25 ppm, less than 10 ppm, or even 0 ppm.

[0230] As described above, usually, a colored glass article containing Ag produced by a mechanical stretching process also contains anisotropic silver particles similar to those of the colored glass article of the present application. However, when the mechanical stretching process is used, it should be noted that the anisotropic silver particles are in a regularly aligned state (for example, the longitudinal dimensions of each anisotropic silver particle are in the same direction (such as the stretching direction in mechanical stretching)). Briefly speaking, a colored glass article produced by a mechanical stretching process becomes a polarized glass because the anisotropic silver particles in the glass are aligned by mechanical stretching.

[0231] In contrast, the colored glass article containing Ag as a colorant in the embodiments described herein has not undergone a mechanical stretching process and is a non-polarized glass. In multiple embodiments, the anisotropic silver particles of the colored glass article are not in an aligned state (for example, the longitudinal dimensions of two or more anisotropic silver particles are in different directions), and the anisotropic silver particles are randomly arranged in the glass.

[0232] As used herein, the term "length" refers to the longest dimension of the anisotropic silver particles. The length of the anisotropic silver particles in the colored glass article described herein is 10 nm or more, 12 nm or more, 14 nm or more, 16 nm or more, 18 nm or more, 20 nm or more, 22 nm or more, 24 nm or more, 26 nm or more, 28 nm or more, 30 nm or more, 32 nm or more, 34 nm or more, 36 nm or more, or further 38 nm or more. The length of the anisotropic silver particles can be measured by performing image analysis of an electron micrograph obtained from a sample of the colored glass article using software such as ImageJ. The length and width of the anisotropic silver particles are obtained as follows. First, calibration is performed by reading the scale bar on the electron micrograph and converting each pixel to an appropriate unit length. Next, the image is converted to a grayscale image. Then, using the software measurement tool, the number of pixels from end to end of each particle and the number of pixels of the maximum particle width are measured. In a plurality of embodiments, an automatic script is executed to automatically measure the length and aspect ratio for a plurality of particles. In a plurality of embodiments, the length of the anisotropic silver particles in the colored glass article described herein is 40 nm or less, 38 nm or less, 36 nm or less, 34 nm or less, 32 nm or less, 30 nm or less, 28 nm or less, 26 nm or less, 24 nm or less, 22 nm or less, or further 20 nm or less. In a plurality of embodiments, the length of the anisotropic silver particles in the colored glass article described herein is 10 nm or more and 40 nm or less, 12 nm or more and 36 nm or less, 14 nm or more and 34 nm or less, 14 nm or more and 32 nm or less, 14 nm or more and 28 nm or less, 14 nm or more and 26 nm or less, 16 nm or more and 26 nm or less, 16 nm or more and 24 nm or less, 16 nm or more and 22 nm or less, 16 nm or more and 20 nm or less, or within any and all sub-ranges formed from each endpoint of these ranges.

[0233] As used herein, the term "width" refers to the dimension of an anisotropic particle that extends in a direction perpendicular to the longest dimension of the anisotropic particle (i.e., the dimension in the direction perpendicular to the length). In a plurality of embodiments, the width of the anisotropic silver particles in the colored glass article described herein is 6 nm or more, 8 nm or more, 10 nm or more, 12 nm or more, or further 14 nm or more. In a plurality of embodiments, the width of the anisotropic silver particles in the colored glass article described herein is 20 nm or less, 18 nm or less, 16 nm or less, 12 nm or less, or further 10 nm or less. In a plurality of embodiments, the width of the anisotropic silver particles in the colored glass article described herein is from 6 nm to 20 nm, from 6 nm to 18 nm, from 6 nm to 16 nm, from 8 nm to 20 nm, from 8 nm to 18 nm, from 8 nm to 16 nm, from 10 nm to 20 nm, from 10 nm to 18 nm, from 10 nm to 16 nm, from 10 nm to 14 nm, or within any and all sub-ranges formed from the endpoints of these ranges.

[0234] In a plurality of embodiments, the aspect ratio of the anisotropic silver particles in the colored glass article described herein (i.e., the ratio of the length to the width of the anisotropic silver nanoparticles) is greater than 1, 1.5 or more, 2 or more, or further 2.5 or more. In a plurality of embodiments, the aspect ratio of the anisotropic silver particles in the colored glass article described herein is 3 or less, 2.5 or less, 2 or less, or further 1.5 or less. In a plurality of embodiments, the aspect ratio of the anisotropic silver particles in the colored glass article described herein is greater than 1 and 3 or less, greater than 1 and 2.5 or less, greater than 1 and 2 or less, greater than 1 and 1.5 or less, 1.5 or more and 3 or less, 1.5 or more and 2.5 or less, 1.5 or more and 2 or less, 2 or more and 3 or less, 2 or more and 2.5 or less, or within any and all sub-ranges formed from the endpoints of these ranges.

[0235] A glass composition containing Ag as a colorant and a colored glass article obtained therefrom are CeO 2 , Nd 2 O 3 , Er 2 O 3One or more rare earth oxides such as etc. can be further included. By adding rare earth oxides, additional visible light absorbance can be imparted to the glass (in addition to the absorbance of visible light obtained by silver), and the color of the glass can be further changed. Also, rare earth oxides can be added to the raw materials to raise the Young's modulus and / or annealing point of the glass.

[0236] In multiple embodiments, a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can further contain CeO from 0 mol% to 4 mol% 2 In multiple embodiments, a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can further contain CeO from 0 mol% to 3 mol% 2 , CeO from 0 mol% to 1 mol% 2 , CeO from 0.05 mol% to 1 mol% 2 , or CeO from 0.05 mol% to 0.5 mol% 2 In multiple embodiments, a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can further contain CeO 2 The concentration of can be 0 mol% or more, or further 0.05 mol% or more. In multiple embodiments, the concentration of CeO 2 in a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can be 4 mol% or less, 3 mol% or less, 2 mol% or less, 1 mol% or less, or 0.5 mol% or less. In multiple embodiments, the concentration of CeO 2 in a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can be from 0 mol% to 4 mol%, from 0 mol% to 3 mol%, from 0 mol% to 2 mol%, from 0 mol% to 1 mol%, from 0 mol% to 0.5 mol%, from 0.05 mol% to 4 mol%, from 0.05 mol% to 3 mol%, from 0.05 mol% to 2 mol%, from 0.05 mol% to 1 mol%, or further from 0.05 mol% to 0.5 mol%, or within any and all sub-ranges formed from the endpoints of these ranges.

[0237] In a plurality of embodiments, a glass composition containing Ag as a colorant and a colored glass article obtained therefrom may further contain Nd in an amount of 0 mol% or more and 4 mol% or less. 2 O 3 In a plurality of embodiments, a glass composition containing Ag as a colorant and a colored glass article obtained therefrom may further contain Nd in an amount of 0 mol% or more and 3 mol% or less. 2 O 3 Nd in an amount of 0 mol% or more and 1 mol% or less. 2 O 3 Nd in an amount of 0 mol% or more and 1 mol% or less. 2 O 3 Nd in an amount of 0.1 mol% or more and 1 mol% or less. 2 O 3 Nd in an amount of 0.1 mol% or more and 1.5 mol% or less. 2 O 3 Or Nd in an amount of 0.1 mol% or more and 0.5 mol% or less. 2 O 3 In a plurality of embodiments, the concentration of Nd 2 O 3 in a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can be 0 mol% or more, or further 0.1 mol% or more. In a plurality of embodiments, the concentration of Nd 2 O 3 in a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can be 4 mol% or less, 3 mol% or less, 2 mol% or less, 1 mol% or less, or 0.5 mol% or less. In a plurality of embodiments, the concentration of Nd 2 O 3 in a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can be 0 mol% or more and 4 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1 mol% or less, 0 mol% or more and 1.5 mol% or less, 0 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 4 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 1 mol% or less, or further 0.1 mol% or more and 0.5 mol% or less, or within any and all sub-ranges formed from the endpoints of these ranges.

[0238] In multiple embodiments, a glass composition containing Ag as a colorant and a colored glass article obtained therefrom may further contain Er of 0 mol% or more and 4 mol% or less 2 O 3 In multiple embodiments, a glass composition containing Ag as a colorant and a colored glass article obtained therefrom may further contain Er of 0 mol% or more and 3 mol% or less 2 O 3 Er of 0 mol% or more and 1.5 mol% or less 2 O 3 Er of 0 mol% or more and 1 mol% or less 2 O 3 Er of 0.1 mol% or more and 1.5 mol% or less 2 O 3 Er of 0.1 mol% or more and 1 mol% or less 2 O 3 Or Er of 0.1 mol% or more and 0.5 mol% or less 2 O 3 In multiple embodiments, the concentration of Er 2 O 3 in a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can be 0 mol% or more, or further 0.1 mol% or more. In multiple embodiments, the concentration of Er 2 O 3 in a glass composition containing Ag as a colorant and a colored glass article obtained therefrom can be 4 mol% or less, 3 mol% or less, 2 mol% or less, 1 mol% or less, or 0.5 mol% or less. In multiple embodiments, the concentration of Er 2 O 3The concentration can be 0 mol% or more and 4 mol% or less, 0 mol% or more and 3 mol% or less, 0 mol% or more and 2 mol% or less, 0 mol% or more and 1.5 mol% or less, 0 mol% or more and 1 mol% or less, 0 mol% or more and 0.5 mol% or less, 0.1 mol% or more and 4 mol% or less, 0.1 mol% or more and 3 mol% or less, 0.1 mol% or more and 2 mol% or less, 0.1 mol% or more and 1.5 mol% or less, 0.1 mol% or more and 1 mol% or less, or further 0.1 mol% or more and 0.5 mol% or less, or within any and all sub-ranges formed from each endpoint of these ranges.

[0239] In multiple embodiments, the glass compositions and colored glass articles obtained therefrom described herein contain TiO 2 , MnO, MoO 3 , WO 3 , Y 2 O 3 , CdO, As 2 O 3 , sulfur compounds (e.g., sulfates), halogens, or combinations thereof, etc. may be further included. In multiple embodiments, the glass compositions and colored glass articles obtained therefrom may substantially contain no or contain no such contaminants as TiO 2 , MnO, MoO 3 , WO 3 , Y 2 O 3 , CdO, As 2 O 3 , sulfur compounds (e.g., sulfates), halogens, or combinations thereof, etc.

[0240] In the embodiments described herein, when the melting point of the glass composition is lowered, the glass composition can be melted at a relatively low temperature, and the evaporation of the colorant can be suppressed, so it is considered that it can contribute to the improvement of the residual rate of the colorant. Therefore, the glass compositions and colored glass articles obtained therefrom described herein can optionally also contain MgO and / or ZnO that contribute to lowering the melting point of the glass composition. B 2 O 3 , Li 2 O, Na 2O also lowers the melting point of the glass composition. Also, as described herein, to lower the melting point of the glass composition, SnO 2 , Sb 2 O 3 , and other components such as Bi 2 O 3 can also be added to the glass composition. In a plurality of embodiments, the melting point of the glass composition can be 1550 °C or lower. In a plurality of embodiments, the melting point of the glass composition can be 1300 °C or higher, 1325 °C or higher, 1350 °C or higher, 1375 °C or higher, or further 1400 °C or higher. In a plurality of embodiments, the melting point of the glass composition can be 1550 °C or lower, 1525 °C or lower, 1500 °C or lower, 1475 °C or lower, or further 1450 °C or lower. In a plurality of embodiments, the melting point of the glass composition is 1300 °C or higher and 1550 °C or lower, 1300 °C or higher and 1525 °C or lower, 1300 °C or higher and 1500 °C or lower, 1300 °C or higher and 1475 °C or lower, 1300 °C or higher and 1450 °C or lower, 1325 °C or higher and 1550 °C or lower, 1325 °C or higher and 1525 °C or lower, 1325 °C or higher and 1500 °C or lower, 1325 °C or higher and 1475 °C or lower, 1325 °C or higher and 1450 °C or lower, 1350 °C or higher and 1550 °C or lower, 1350 °C or higher and 1525 °C or lower, 1350 °C or higher and 1500 °C or lower, 1350 °C or higher and 1475 °C or lower, 1350 °C or higher and 1450 °C or lower, 1375 °C or higher and 1550 °C or lower, 1375 °C or higher and 1525 °C or lower, 1375 °C or higher and 1500 °C or lower, 1375 °C or higher and 1475 °C or lower, 1375 °C or higher and 1450 °C or lower, 1400 °C or higher and 1550 °C or lower, 1400 °C or higher and 1525 °C or lower, 1400 °C or higher and 1500 °C or lower, 1400 °C or higher and 1475 °C or lower, or further 1400 °C or higher and 1450 °C or lower, or within any and all sub-ranges formed from each endpoint of these ranges.

[0241] In multiple embodiments, the liquidus temperature of the glass composition can be 1000 °C or higher, 1050 °C or higher, or further 1100 °C or higher. In multiple embodiments, the liquidus temperature of the precursor glass composition can be 1400 °C or lower, 1350 °C or lower, or further 1300 °C or lower. In multiple embodiments, the liquidus temperature of the glass composition is from 1000 °C to 1400 °C, from 1000 °C to 1350 °C, from 1000 °C to 1300 °C, from 1050 °C to 1400 °C, from 1050 °C to 1350 °C, from 1000 °C to 1300 °C, from 1100 °C to 1400 °C, from 1100 °C to 1350 °C, or further from 1100 °C to 1300 °C, or can be within any and all sub-ranges formed from each endpoint of these ranges.

[0242] In multiple embodiments, during melt forming, the viscosity of the glass composition can be adjusted so as to prevent the glass composition from devitrifying and forming coloring agent particles such as Au particles. If coloring agent particles are formed during melt forming, there is a risk that the color gamut achievable after heat treatment will be limited. In multiple embodiments, the glass composition described herein and the glass article obtained therefrom are 5.72*Al 2 O 3 (mol%) - 21.4*ZnO (mol%) - 2.5*P 2 O 5 (mol%) - 35*Li 2 O (mol%) - 16.6*B 2 O 3 (mol%) - 20.5*MgO (mol%) - 23.3*Na 2 O (mol%) - 27.9*SrO (mol%) - 18.5*K 2By satisfying the relationship that O (mol%) - 26.3 * CaO (mol%) exceeds - 609 mol%, the desired viscosity can be achieved, thereby preventing the situation where coloring agent particles are formed before melting. Although not wishing to be bound by theory, this relationship is considered to also apply to glass compositions containing coloring agents other than Au, for example, when the coloring agent contains Ag (Ag also has the risk of forming coloring agent particles in the glass). In a plurality of embodiments, the glass composition described herein and the glass article obtained therefrom are 5.72 * Al 2 O 3 (mol%) - 21.4 * ZnO (mol%) - 2.5 * P 2 O 5 (mol%) - 35 * Li 2 O (mol%) - 16.6 * B 2 O 3 (mol%) - 20.5 * MgO (mol%) - 23.3 * Na 2 O (mol%) - 27.9 * SrO (mol%) - 18.5 * K 2 O (mol%) - 26.3 * CaO (mol%) can satisfy the relationship of being more than - 609 mol%, - 575 mol% or more, - 550 mol% or more, or further - 525 mol% or more. In a plurality of embodiments, the glass composition described herein and the glass article obtained therefrom are 5.72 * Al 2 O 3 (mol%) - 21.4 * ZnO (mol%) - 2.5 * P 2 O 5 (mol%) - 35 * Li 2 O (mol%) - 16.6 * B 2 O 3 (mol%) - 20.5 * MgO (mol%) - 23.3 * Na 2 O (mol%) - 27.9 * SrO (mol%) - 18.5 * K 2 O (mol%) - 26.3 * CaO (mol%) can satisfy the relationship of being - 400 mol% or less, - 425 mol% or less, or further - 450 mol% or less. In a plurality of embodiments, the glass composition described herein and the glass article obtained therefrom are 5.72 * Al 2 O 3(mol%) - 21.4 * ZnO (mol%) - 2.5 * P 2 O 5 (mol%) - 35 * Li 2 O (mol%) - 16.6 * B 2 O 3 (mol%) - 20.5 * MgO (mol%) - 23.3 * Na 2 O (mol%) - 27.9 * SrO (mol%) - 18.5 * K 2 O (mol%) - 26.3 * CaO (mol%) is more than -609 mol% and less than or equal to -400 mol%, more than -609 mol% and less than or equal to -425 mol%, more than -609 mol% and less than or equal to -450 mol%, more than -575 mol% and less than or equal to -400 mol%, more than -575 mol% and less than or equal to -425 mol%, more than -575 mol% and less than or equal to -450 mol%, more than -550 mol% and less than or equal to -400 mol%, more than -550 mol% and less than or equal to -425 mol%, more than -550 mol% and less than or equal to -450 mol%, more than -525 mol% and less than or equal to -400 mol%, more than -525 mol% and less than or equal to -425 mol%, or further or more than -525 mol% and less than or equal to -450 mol%, or can satisfy the relationship of being within any and all partial ranges formed from each endpoint of these ranges.

[0243] In multiple embodiments, the formation of a colored glass article can begin with the step of melting a glass composition. Here, the glass composition includes a combination of the glass components described herein and one or more colorants as a colorant set. Next, the molten glass is formed into a precursor glass article using conventional shaping techniques and then cooled. The precursor glass article can take on any number of shapes. Such shapes include, but are not limited to, plate-like, tubular, rod-like, container-like (e.g., the shapes of vials, bottles, jars, etc.). And in multiple embodiments, the precursor glass article can be heat-treated to cause the glass to develop color. For example, but not limited to, heat treatment can form colorant particles in the glass, and the colorant particles can cause the glass to develop color. In some embodiments, the glass before heat treatment may appear transparent (i.e., colorless). Examples of colorant particles include, but are not limited to, Au particles (such as when the colorant set included in the glass contains Au), and / or randomly oriented anisotropic silver particles (such as when the colorant set contains Ag), etc., thereby forming a colored glass article. The time and / or temperature of the heat treatment can be specifically selected to produce a colored glass article having the desired color. Without wishing to be bound by theory, the desired color is obtained as a result of the morphology of the particles precipitating in the glass, and such particle morphology is considered to depend on the time and temperature of the heat treatment. Therefore, it should be understood that colored glass articles having different colors can be formed from one glass composition based on, in addition to the composition of the colorant set included in the glass, the time and / or temperature of the heat treatment applied.

[0244] Specifically, by changing the heat treatment cycle performed on the glass composition to manufacture a colored glass article, it is possible to achieve different color coordinates within the color gamut. The heat treatment cycle is characterized by the temperature of the environment (i.e., the furnace) and the length of the cycle (i.e., the time of exposure to the heating environment). In this specification, the expression "temperature of the heat treatment cycle" refers to the temperature of the environment (i.e., the furnace). In a plurality of embodiments, the glass article formed from the glass composition described herein is heat treated in an isothermal furnace, thereby manufacturing a colored glass article.

[0245] In a plurality of embodiments, the temperature of the heat treatment cycle is 500 °C or higher, 550 °C or higher, 575 °C or higher, 600 °C or higher, 625 °C or higher, or further 650 °C or higher. In a plurality of embodiments, the temperature of the heat treatment cycle is 800 °C or lower, 775 °C or lower, 750 °C or lower, 725 °C or lower, or further 700 °C or lower. In a plurality of embodiments, the temperature of the heat treatment cycle is from 500 °C to 800 °C, from 500 °C to 775 °C, from 500 °C to 750 °C, from 500 °C to 725 °C, from 550 °C to 700 °C, from 550 °C to 800 °C, from 550 °C to 775 °C, from 550 °C to 750 °C, from 550 °C to 725 °C, from 550 °C to 700 °C, from 575 °C to 800 °C, from 575 °C to 775 °C, from 575 °C to 750 °C, from 575 °C to 725 °C, from 575 °C to 700 °C, from 600 °C to 800 °C, from 600 °C to 775 °C, from 600 °C to 750 °C, from 600 °C to 725 °C, from 600 °C to 700 °C, from 625 °C to 800 °C, from 625 °C to 775 °C, from 625 °C to 750 °C, from 625 °C to 725 °C, from 625 °C to 700 °C, from 650 °C to 800 °C, from 650 °C to 775 °C, from 650 °C to 750 °C, from 650 °C to 725 °C, or further from 650 °C to 700 °C, or within any and all sub-ranges formed from the endpoints of these ranges.

[0246] In multiple embodiments, the length of the heat treatment cycle is 0.15 hours or more, 0.25 hours or more, 0.5 hours or more, 1 hour or more, further or 2 hours or more. In multiple embodiments, the length of the heat treatment cycle is 24 hours or less, 16 hours or less, 8 hours or less, 6 hours or less, 4 hours or less, further or 3 hours or less. In multiple embodiments, the length of the heat treatment cycle is from 0.25 hours or more to 24 hours or less, from 0.25 hours or more to 16 hours or less, from 0.25 hours or more to 8 hours or less, from 0.25 hours or more to 4 hours or less, from 0.5 hours or more to 24 hours or less, from 0.5 hours or more to 16 hours or less, from 0.5 hours or more to 8 hours or less, from 0.5 hours or more to 4 hours or less, from 1 hour or more to 24 hours or less, from 1 hour or more to 16 hours or less, from 1 hour or more to 8 hours or less, from 1 hour or more to 4 hours or less, from 2 hours or more to 24 hours or less, from 2 hours or more to 16 hours or less, from 2 hours or more to 8 hours or less, further or from 2 hours or more to 4 hours or less, or within any and all sub-ranges formed from the endpoints of these ranges.

[0247] In multiple embodiments, the heat treatment can include a step of ramping up to the heat treatment temperature at a ramp-up rate and a step of cooling down from the heat treatment temperature at a cooling rate. In multiple embodiments, it is considered that the selected ramp-up rate and cooling rate affect the color coordinates of the resulting colored glass article.

[0248] In multiple embodiments, the ramp-up rate of the heat treatment can be 2 °C / min or more, further or 3 °C / min or more. In multiple embodiments, the ramp-up rate of the heat treatment can be 10 °C / min or less, 7 °C / min or less, further or 5 °C / min or less. In multiple embodiments, the ramp-up rate of the heat treatment can be from 2 °C / min or more to 10 °C / min or less, from 2 °C / min or more to 7 °C / min or less, from 2 °C / min or more to 5 °C / min or less, from 3 °C / min or more to 10 °C / min or less, from 3 °C / min or more to 7 °C / min or less, further or from 3 °C / min or more to 5 °C / min or less, or within any and all sub-ranges formed from the endpoints of these ranges.

[0249] In a plurality of embodiments, the cooling rate of the heat treatment can be 1 °C / min or more, further or 2 °C / min or more. In a plurality of embodiments, the cooling rate of the heat treatment can be 10 °C / min or less, 8 °C / min or less, 6 °C / min or less, further or 4 °C / min or less. In a plurality of embodiments, the cooling rate of the heat treatment can be from 1 °C / min to 10 °C / min, from 1 °C / min to 8 °C / min, from 1 °C / min to 6 °C / min, from 1 °C / min to 4 °C / min, from 2 °C / min to 10 °C / min, from 2 °C / min to 8 °C / min, from 2 °C / min to 6 °C / min, further or from 2 °C / min to 4 °C / min, or within any and all sub-ranges formed from each endpoint of these ranges.

[0250] For example, but not limited to, in embodiments where the glass composition contains Ag, by heat-treating the precursor glass article at a heat treatment temperature of about 590 °C to about 610 °C for a heat treatment time of about 45 minutes to about 180 minutes, a colored glass article having an orange color can be formed.

[0251] For example, but not limited to, in embodiments where the glass composition contains Ag, by heat-treating the precursor glass article at a heat treatment temperature of about 600 °C to about 615 °C for a heat treatment time of about 180 minutes to about 300 minutes, a colored glass article having a red color can be formed.

[0252] For example, but not limited to, in embodiments where the glass composition contains Ag, by heat-treating the precursor glass article at a heat treatment temperature of about 620 °C to about 640 °C for a heat treatment time of about 20 minutes to about 40 minutes, a colored glass article having a green color can be formed.

[0253] For example, but not limited to, in embodiments where the glass composition contains Ag, by heat-treating the precursor glass article at a heat treatment temperature of about 640 °C to about 660 °C for a heat treatment time of about 30 minutes to about 90 minutes, a colored glass article having a brown color can be formed.

[0254] For example, but not limited to, in embodiments where the glass composition contains Ag, a colored glass article having a purple color can be formed by heat-treating the precursor glass article at a heat-treatment temperature of about 625°C to about 650°C for a heat-treatment time of about 30 minutes to about 90 minutes.

[0255] Note that in some embodiments of the glass described herein, heat treatment is required to impart color to the glass, but in other embodiments of the glass described herein, it should be noted that heat treatment is not required to impart color to the glass. For example, among glasses containing transition metal oxides and / or rare earth oxides, there are some that do not require heat treatment to impart color to the glass. Therefore, it should be understood that heat treatment is optional.

[0256] After heat treatment (if necessary), the glass described herein develops color and becomes in a state called a colored glass article. In a plurality of embodiments, the colored glass article is mainly glass (i.e., mainly amorphous), but can contain particles having a crystalline morphology (such as colorant particles). Therefore, the colored glass article can contain at least one crystalline phase. In a plurality of embodiments, for example, but not limited to, the crystalline phase can be an Au crystalline phase and / or an Ag crystalline phase. However, other crystalline phases are also possible, and it should be understood that other crystalline phases can exist as a substitute for, or in place of, the Au crystalline phase and / or the Ag crystalline phase. In a plurality of embodiments, the crystallinity of the colored glass article is 10% by mass or less, 9% by mass or less, 8% by mass or less, 7% by mass or less, 6% by mass or less, 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, or further 1% by mass or less based on the mass of the glass article.

[0257] In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 20 or more and 96.5 or less. In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where the absolute value of a* (i.e., |a*|) is 0.3 or more. In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where the absolute value of b* (i.e., |b*|) is 0.5 or more. In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 20 or more and 96.5 or less, the absolute value of a* (i.e., |a*|) is 0.3 or more, and the absolute value of b* (i.e., |b*|) is 0.5 or more. In these embodiments, L* can be 25 or more, 30 or more, 35 or more, 40 or more, 45 or more, 50 or more, or even 55 or more. As already mentioned, unless otherwise specified, the transmission color coordinates in the CIELAB color space represent the values measured for an article with a thickness of 0.4 mm or more and 5 mm or less under the conditions of F2 illumination and a 10° field standard observer.

[0258] Without wishing to be bound by theory, glass having CIELAB color coordinates within the range where L* is 20 or more and 96.5 or less is considered to be transparent rather than opaque to the wavelengths of visible light (i.e., wavelengths of light from 380 nm to 750 nm). However, as the value of L* decreases, the color of the colored glass article becomes more saturated and the opacity of the glass increases (i.e., the transparency decreases). Also, as the value of L* increases, the color of the colored glass article becomes less saturated, and when the L* value exceeds 96.5, the colored glass article is considered to appear colorless.

[0259] In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -5 or more and 25 or less (excluding the case where a* is greater than -0.3 and less than 0.3), and b* is -20 or more and 5 or less (excluding the case where b* is greater than -0.5 and less than 0.5).

[0260] In a plurality of embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -10 or more and 25 or less (except when a* is more than -0.3 and less than 0.3), and b* is -20 or more and 5 or less (except when b* is more than -0.5 and less than 0.5).

[0261] In a plurality of embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -18 or more and 0.3 or less, and b* is 0.5 or more and 82 or less.

[0262] In a plurality of embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -18 or more and 18 or less (except when a* is more than -0.3 and less than 0.3), and b* is 0.5 or more and 82 or less.

[0263] In a plurality of embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -20 or more and 60 or less (except when a* is more than -0.3 and less than 0.3), and b* is -90 or more and 85 or less (except when b* is more than -0.5 and less than 0.5).

[0264] In a plurality of embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -35 or more and -0.3 or less, and b* is 0.5 or more and 82 or less.

[0265] In a plurality of embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -35 or more and 20 or less (except when a* is more than -0.3 and less than 0.3), and b* is 0.5 or more and 75 or less.

[0266] In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or greater and 96.5 or less, a* is -15 or greater and 65 or less (except when a* is greater than -0.3 and less than 0.3), and b* is -90 or greater and 80 or less (except when b* is greater than -0.5 and less than 0.5).

[0267] In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or greater and 96.5 or less, a* is -35 or greater and 60 or less (except when a* is greater than -0.3 and less than 0.3), and b* is -90 or greater and 80 or less (except when b* is greater than -0.5 and less than 0.5).

[0268] In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or greater and 96.5 or less, a* is -35 or greater and 60 or less (except when a* is greater than -0.3 and less than 0.3), and b* is -90 or greater and 80 or less (except when b* is greater than -0.5 and less than 0.5).

[0269] In multiple embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or greater and 96.5 or less, a* is -11.12 or greater and 60 or less (except when a* is greater than -0.3 and less than 0.3), and b* is -20 or greater and 120 or less (except when b* is greater than -0.5 and less than 0.5).

[0270] In multiple embodiments, the transmission color coordinates in the CIELAB color space can be described by the range of L* values and the color space region of a* (horizontal axis or x-axis) and b* (vertical axis or y-axis). And this a* vs. b* color space region can be defined by the intersection of multiple lines defined by a* and b*.

[0271] In a plurality of embodiments, a colored glass article that appears yellow can have transmission color coordinates in the CIELAB color space where L* is 20 or more and 90 or less, and the a* value and the b* value are within the a* vs. b* color space region surrounded by the intersections of the straight lines b* = 0.2879·a* + 27.818, b* = 7.0833·a* - 94.5, b* = 0.45·a* + 104.5, and b* = 15.3·a* + 253. Note that this color space region is the region shown as the region surrounded by the straight lines A, B, C, and D in the graph of FIG. 48.

[0272] In a plurality of embodiments, a colored glass article that appears orange can have transmission color coordinates in the CIELAB color space where L* is 20 or more and 90 or less, and the a* value and the b* value are within the a* vs. b* color space region surrounded by the intersections of the straight lines b* = 7.0833·a* - 94.5, b* = -0.9583·a* + 146.75, b* = 2.6957·a* - 50.565, and b* = 33. Note that this color space region is the region shown as the region surrounded by the straight lines B, E, F, and G in the graph of FIG. 48.

[0273] In a plurality of embodiments, a colored glass article that appears red can have transmission color coordinates in the CIELAB color space where L* is 20 or more and 90 or less, and the a* value and the b* value are within the a* vs. b* color space region surrounded by the intersections of the straight lines b* = 2.6957·a* - 50.565, a* = 54, b* = 1.0769·a* - 17.154, and b* = 6.6667·a* - 173.67. Note that this color space region is the region shown as the region surrounded by the straight lines F, H, I, and J in the graph of FIG. 48.

[0274] In a plurality of embodiments, a colored glass article that appears green can have transmission color coordinates in the CIELAB color space where L* is 4 or more and 80 or less, and the a* value and the b* value are within the a* vs. b* color space region enclosed by the intersection of the straight lines b* = 0.2879·a* + 27.818, a* = 0, b* = -1.375·a* + 1, and b* = 9.333·a* + 86.667 (except when a* is greater than -0.3 and less than 0.3, and except when b* is greater than -0.5 and less than 0.5). Note that this color space region is the region shown as the region enclosed by the straight lines A, K, L, M in the graph of FIG. 48.

[0275] In a plurality of embodiments, a colored glass article that appears pink / violet can have transmission color coordinates in the CIELAB color space where L* is 10 or more and 80 or less, and the a* value and the b* value are within the a* vs. b* color space region enclosed by the intersection of the straight lines b* = 0.0833·a* + 20.833, b* = 2.1182·a* - 32.073, b* = -0.3, and b* = 1.5929·a* - 0.3 (except when a* is greater than -0.3 and less than 0.3, and except when b* is greater than -0.5 and less than 0.5). Note that this color space region is the region shown as the region enclosed by the straight lines N, O, P, Q in the graph of FIG. 48.

[0276] In a plurality of embodiments, a colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -15 or more and -0.3 or less, and b* is -10 or more and 10 or less (except when b* is greater than -0.5 and less than 0.5).

[0277] In a plurality of embodiments, a colored glass article can have transmission color coordinates in the CIELAB color space where L* is 85 or more and 96.5 or less, a* is -10 or more and less than -0.3, and b* is -5 or more and 5 or less (except when b* is greater than -0.5 and less than 0.5).

[0278] In an embodiment where the colored glass article described in this specification contains Au in the colorant set, the difference R 2O-Al 2 O 3 In combination with Au, the concentrations of R 2 O and Al 2 O 3 are adjusted so that a colored glass article having a desired color (e.g., pink, purple, red, orange, etc.) is produced. In a plurality of embodiments, the colored glass article can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -15 or more and 25 or less, and b* is -25 or more and 25 or less (except when a* is more than -0.3 and less than 0.3 and except when b* is more than -0.5 and less than 0.5).

[0279] In embodiments where the colorant set includes Au, when the concentration difference R 2 O-Al 2 O 3 is relatively small (e.g., 1.5 mol% or less), a blue or purple glass article can be obtained. Also, when the concentration difference R 2 O-Al 2 O 3 is relatively large (e.g., more than 1.5 mol%), an orange or red glass article can be obtained.

[0280] For example, in embodiments where the colorant set includes Au, R 2 O-Al 2 O 3 can be -5 mol% or more and 1.5 mol% or less, and b* can be -25 or more and 10 or less (except when b* is more than -0.5 and less than 0.5). In a plurality of embodiments, R 2 O-Al 2 O 3 can be -3 mol% or more and 1.5 mol% or less, and b* can be -15 or more and 7 or less (except when b* is more than -0.5 and less than 0.5). In a plurality of embodiments, R 2 O-Al 2 O 3shall be in the range of -5 mol% or more and 1.5 mol% or less, -3 mol% or more and 1.5 mol% or less, -1 mol% or more and 1.5 mol% or less, or further 0 mol% or more and 1.5 mol% or less, or within any and all partial ranges formed from the respective endpoints of these ranges. b* shall be -25 or more and 10 or less (except when b* is more than -0.5 and less than 0.5), -25 or more and 7 or less, -25 or more and 5 or less (except when b* is more than -0.5 and less than 0.5), -15 or more and 10 or less (except when b* is more than -0.5 and less than 0.5), -15 or more and 7 or less (except when b* is more than -0.5 and less than 0.5), -15 or more and 5 or less (except when b* is more than -0.5 and less than 0.5), -10 or more and 10 or less (except when b* is more than -0.5 and less than 0.5), -10 or more and 7 or less (except when b* is more than -0.5 and less than 0.5), or further -10 or more and 5 or less (except when b* is more than -0.5 and less than 0.5), or within any and all partial ranges formed from the respective endpoints of these ranges.

[0281] In embodiments where the colorant set contains Au, R 2 O - Al 2 O 3 can be more than 1.5 mol% and 7 mol% or less, and b* can be 0.5 or more and 25 or less. In a plurality of embodiments, R 2 O - Al 2 O 3 can be more than 1.5 mol% and 5 mol% or less, and b* can be 0.5 or more and 15 or less. In a plurality of embodiments, R 2 O - Al 2 O 3 shall be more than 1.5 mol% and 7 mol% or less, more than 1.5 mol% and 5 mol% or less, or further more than 1.5 mol% and 3 mol% or less, or within any and all partial ranges formed from the respective endpoints of these ranges, and b* shall be 0.5 or more and 25 or less, 0.5 or more and 15 or less, 0.5 or more and 10 or less, 2.5 or more and 25 or less, 2.5 or more and 15 or less, 2.5 or more and 10 or less, 5 or more and 25 or less, 5 or more and 15 or less, or further 5 or more and 10 or less, or within any and all partial ranges formed from the respective endpoints of these ranges.

[0282] In multiple embodiments, a colored glass article containing Au as a colorant can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -5 or more and 25 or less (except when a* is more than -0.3 and less than 0.3), and b* is -20 or more and 5 or less (except when b* is more than -0.5 and less than 0.5).

[0283] In multiple embodiments, a colored glass article containing Au as a colorant can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -10 or more and 25 or less (except when a* is more than -0.3 and less than 0.3), and b* is -20 or more and 5 or less (except when b* is more than -0.5 and less than 0.5).

[0284] In multiple embodiments, as a colorant, Cr 2 O 3 A colored glass article containing can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -18 or more and 0.3 or less, and b* is 0.5 or more and 82 or less.

[0285] In multiple embodiments, as a colorant, Cr 2 O 3 A colored glass article containing CrO and NiO can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -18 or more and 18 or less (except when a* is more than -0.3 and less than 0.3), and b* is 0.5 or more and 82 or less.

[0286] In multiple embodiments, as a colorant, Cr 2 O 3 And Co 3 O 4 A colored glass article containing CrO and CoO can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -20 or more and 60 or less (except when a* is more than -0.3 and less than 0.3), and b* is -90 or more and 85 or less (except when b* is more than -0.5 and less than 0.5).

[0287] In multiple embodiments, a colored glass article containing Cr as a colorant 2 O 3 and CuO can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -35 or more and -0.3 or less, and b* is 0.5 or more and 82 or less.

[0288] In multiple embodiments, a colored glass article containing Cr as a colorant 2 O 3 , NiO, and CuO can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -35 or more and 20 or less (except when a* is more than -0.3 and less than 0.3), and b* is 0.5 or more and 75 or less.

[0289] In multiple embodiments, a colored glass article containing Cr as a colorant 2 O 3 , NiO, and Co 3 O 4 O can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -15 or more and 65 or less (except when a* is more than -0.3 and less than 0.3), and b* is -90 or more and 80 or less (except when b* is more than -0.5 and less than 0.5).

[0290] In multiple embodiments, a colored glass article containing Cr as a colorant 2 O 3 , CuO, and Co 3 O 4 O can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -35 or more and 60 or less (except when a* is more than -0.3 and less than 0.3), and b* is -90 or more and 80 or less (except when b* is more than -0.5 and less than 0.5).

[0291] In multiple embodiments, a colored glass article containing Cr as a colorant 2 O 3 , NiO, CuO, and Co 3 O 4The colored glass article containing [substance] can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -35 or more and 60 or less (except when a* is more than -0.3 and less than 0.3), and b* is -90 or more and 80 or less (except when b* is more than -0.5 and less than 0.5).

[0292] In a plurality of embodiments, the colored glass article containing Ag as a colorant can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -11.12 or more and 60 or less (except when a* is more than -0.3 and less than 0.3), and b* is -20 or more and 120 or less (except when b* is more than -0.5 and less than 0.5).

[0293] In a plurality of embodiments, the transmission color coordinates in the CIELAB color space can be described by the range of L* values and the color space region of a* (horizontal axis or x-axis) and b* (vertical axis or y-axis). And this a* vs. b* color space region can be defined by the intersection of a plurality of straight lines defined by a* and b*.

[0294] For example, in a plurality of embodiments, the colored glass article containing Ag as a colorant and appearing yellow can have transmission color coordinates in the CIELAB color space where L* is 20 or more and 90 or less, and the a* value and b* value are within the a* vs. b* color space region surrounded by the intersection of the straight lines b* = 0.2879·a* + 27.818, b* = 7.0833·a* - 94.5, b* = 0.45·a* + 104.5, and b* = 15.3·a* + 253. Note that this color space region is the region shown as the region surrounded by the straight lines A, B, C, and D in the graph of FIG. 48.

[0295] In a plurality of embodiments, a colored glass article containing Ag as a colorant and appearing orange can have transmission color coordinates within an a* vs. b* color space region surrounded by the intersection of the lines b* = 7.0833·a* - 94.5, b* = -0.9583·a* + 146.75, b* = 2.6957·a* - 50.565, and b* = 33, where L* is 20 or more and 90 or less in the CIELAB color space. Note that this color space region is the region shown as the region surrounded by the lines B, E, F, and G in the graph of FIG. 48.

[0296] In a plurality of embodiments, a colored glass article containing Ag as a colorant and appearing red can have transmission color coordinates within an a* vs. b* color space region surrounded by the intersection of the lines b* = 2.6957·a* - 50.565, a* = 54, b* = 1.0769·a* - 17.154, and b* = 6.6667·a* - 173.67, where L* is 20 or more and 90 or less in the CIELAB color space. Note that this color space region is the region shown as the region surrounded by the lines F, H, I, and J in the graph of FIG. 48.

[0297] In a plurality of embodiments, a colored glass article containing Ag as a colorant and appearing green can have transmission color coordinates within an a* vs. b* color space region (excluding the case where a* is greater than -0.3 and less than 0.3 and the case where b* is greater than -0.5 and less than 0.5) surrounded by the intersection of the lines b* = 0.2879·a* + 27.818, a* = 0, b* = -1.375·a* + 1, and b* = 9.333·a* + 86.667, where L* is 4 or more and 80 or less in the CIELAB color space. Note that this color space region is the region shown as the region surrounded by the lines A, K, L, and M in the graph of FIG. 48.

[0298] In multiple embodiments, a colored glass article containing Ag as a colorant and appearing pink / violet can have transmission color coordinates in the CIELAB color space where L* is 10 or more and 80 or less, and the a* value and b* value are within the a* vs. b* color space region surrounded by the intersection of the straight lines b* = 0.0833·a* + 20.833, b* = 2.1182·a* - 32.073, b* = -0.3, and b* = 1.5929·a* - 0.3 (provided that it excludes the case where a* is more than -0.3 and less than 0.3, and excludes the case where b* is more than -0.5 and less than 0.5). Note that this color space region is the region shown as the region surrounded by the straight lines N, O, P, and Q in the graph of FIG. 48.

[0299] In multiple embodiments, a colored glass article containing a transition metal oxide and / or a rare earth metal oxide (such as NiO, CuO, TiO 2 、Co 3 O 4 、Cr 2 O 3 、and / or CeO 2 etc.) can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -15 or more and -0.3 or less, and b* is -10 or more and 10 or less (excluding the case where b* is more than -0.5 and less than 0.5).

[0300] In multiple embodiments, a colored glass article containing a transition metal oxide and / or a rare earth metal oxide (such as NiO, CuO, TiO 2 、Co 3 O 4 、Cr 2 O 3 、and / or CeO 2 etc.) can have transmission color coordinates in the CIELAB color space where L* is 85 or more and 96.5 or less, a* is -10 or more and less than -0.3, and b* is -5 or more and 5 or less (excluding the case where b* is more than -0.5 and less than 0.5).

[0301] In some embodiments, the average transmittance of the colored glass article for light in the wavelength range of 380 nm to 750 nm is 10% or more and 92% or less. As already described, unless otherwise specified, the average transmittance indicates the value for an article having a thickness of 0.4 mm or more and 5 mm or less. In a plurality of embodiments, the average transmittance of the colored glass article in the wavelength range of 380 nm to 750 nm is 15% or more and 92% or less. In a plurality of embodiments, the average transmittance of the colored glass article for light in the wavelength range of 380 nm to 750 nm is 20% or more and 92% or less. In a plurality of embodiments, the average transmittance of the colored glass article for light in the wavelength range of 380 nm to 750 nm is 25% or more and 92% or less. In a plurality of embodiments, the average transmittance of the colored glass article for light in the wavelength range of 380 nm to 750 nm is 30% or more and 92% or less. In a plurality of embodiments, the average transmittance of the colored glass article in the wavelength range of 380 nm to 750 nm is 19% or more and 88% or less. In a plurality of embodiments, the average transmittance of the colored glass article in the wavelength range of 380 nm to 750 nm is 15% or more and 88% or less. In a plurality of embodiments, the average transmittance of the colored glass article for light in the wavelength range of 380 nm to 750 nm is 20% or more and 88% or less. In a plurality of embodiments, the average transmittance of the colored glass article for light in the wavelength range of 380 nm to 750 nm is 25% or more and 88% or less. In a plurality of embodiments, the average transmittance of the colored glass article for light in the wavelength range of 380 nm to 750 nm is 30% or more and 88% or less.

[0302] In a plurality of embodiments, the dielectric constant Dk at 10 GHz of the colored glass article described herein can be 6.4 or less, for example, it can be 5.6 or more and 6.4 or less. In a plurality of embodiments, the dielectric constant of the colored glass article can be 5.7 or more and 6.4 or less, 5.8 or more and 6.4 or less, 5.9 or more and 6.4 or less, 6.0 or more and 6.4 or less, 6.2 or more and 6.4 or less, 5.6 or more and 6.3 or less, 5.7 or more and 6.3 or less, 5.8 or more and 6.3 or less, 5.9 or more and 6.3 or less, 6.0 or more and 6.3 or less, 6.2 or more and 6.3 or less, 5.7 or more and 6.2 or less, 5.8 or more and 6.2 or less, 5.9 or more and 6.2 or less, 6.0 or more and 6.2 or less, or further 6.1 or more and 6.2 or less. As already stated, although not wishing to be bound by theory, the dielectric constant of the colored glass article measured at 10 GHz is considered to approximate the dielectric constant at each frequency in the range of 10 GHz to 60 GHz. Therefore, the dielectric constant of the colored glass article described as a value at a frequency of 10 GHz approximates the dielectric constant of the colored glass article at each frequency in the frequency range of 10 GHz or more and 60 GHz or less.

[0303] The colored glass article formed from the glass composition described in this specification can have any suitable thickness that can be varied according to the specific use of the colored glass article. In a plurality of embodiments, the thickness of the colored glass article is 200 μm or more and 6 mm or less, 200 μm or more and 4 mm or less, 200 μm or more and 2 mm or less, 200 μm or more and 1 mm or less, 200 μm or more and 750 μm or less, 200 μm or more and 650 μm or less, 200 μm or more and 600 μm or less, 200 μm or more and 550 μm or less, 200 μm or more and 500 μm or less, 250 μm or more and 6 mm or less, 250 μm or more and 4 mm or less, 250 μm or more and 2 mm or less, 250 μm or more and 1 mm or less, 250 μm or more and 750 μm or less, 250 μm or more and 650 μm or less, 250 μm or more and 600 μm or less, 250 μm or more and 550 μm or less, 250 μm or more and 500 μm or less, 300 μm or more and 6 mm or less, 300 μm or more and 4 mm or less, 300 μm or more and 2 mm or less, 300 μm or more and 1 mm or less, 300 μm or more and 750 μm or less, 300 μm or more and 650 μm or less, 300 μm or more and 600 μm or less, 300 μm or more and 550 μm or less, 300 μm or more and 500 μm or less, 350 μm or more and 6 mm or less, 350 μm or more and 4 mm or less, 350 μm or more and 2 mm or less, 350 μm or more and 1 mm or less, 350 μm or more and 750 μm or less, 350 μm or more and 650 μm or less, 350 μm or more and 600 μm or less, 350 μm or more and 550 μm or less, 350 μm or more and 500 μm or less, 400 μm or more and 6 mm or less, 400 μm or more and 4 mm or less, 400 μm or more and 2 mm or less, 400 μm or more and 1 mm or less, 400 μm or more and 750 μm or less, 400 μm or more and 650 μm or less, 400 μm or more and 600 μm or less, 400 μm or more and 550 μm or less, 400 μm or more and 500 μm or less, 450 μm or more and 6 mm or less, 450 μm or more and 4 mm or less, 450 μm or more and 2 mm or less, 450 μm or more and 1 mm or less, 450 μm or more and 750 μm or less, 450 μm or more and 650 μm or less, 450 μm or more and 600 μm or less, 450 μm or more and 550 μm or less, 450 μm or more and 500 μm or less, 500 μm or more and 6 mm or less, 500 μm or more and 4 mm or less, 500 μm or more and 2 mm or less, 500 μm or more and 1 mm or less, 500 μm or more and 750 μm or less, 750 μm or more and 6 mm or less, 750 μm or more and 4 mm or less, 750 μm or more and 2 mm or less, 750 μm or more and 1 mm or less, 1 mm or more and 6 mm or less, 1 mm or more and 4 mm or less,It can be within 1 mm or more and 2 mm or less, 2 mm or more and 6 mm or less, 2 mm or more and 4 mm or less, or further or 4 mm or more and 6 mm or less, or within any and all partial ranges formed from each endpoint of these ranges.

[0304] As described above, by increasing the fracture toughness of the colored glass article formed from the glass composition described in this specification, the colored glass article can be made to have high damage resistance. In a plurality of embodiments, the fracture toughness K of the colored glass article before ion exchange treatment measured by the CNSB method IC is 0.7 MPa·m 1 / 2 or more. In a plurality of embodiments, the fracture toughness K of the colored glass article before ion exchange treatment measured by the CNSB method IC is 0.7 MPa·m 1 / 2 or more, 0.8 MPa·m 1 / 2 or more, 0.9 MPa·m 1 / 2 or more, or further or 1.0 MPa·m 1 / 2 or more.

[0305] As described above, by increasing the fracture toughness of the colored glass article formed from the glass composition described in this specification, the colored glass article can be made to have high damage resistance. In a plurality of embodiments, the fracture toughness K of the colored glass article before ion exchange treatment measured by the DCB method IC is 0.7 MPa·m 1 / 2 or more. In a plurality of embodiments, the fracture toughness K of the colored glass article before ion exchange treatment measured by the DCB method IC is 0.7 MPa·m 1 / 2 or more, 0.8 MPa·m 1 / 2 or more, 0.9 MPa·m 1 / 2 or more, or further or 1.0 MPa·m 1 / 2 or more.

[0306] In multiple embodiments, the glass compositions described herein are ion-exchangeable, which enables the strengthening of colored glass articles manufactured from the present glass compositions. In a typical ion-exchange process, within a layer near the outer surface of a colored glass article manufactured from the glass composition, relatively small metal ions in the glass composition are replaced (i.e., “exchanged”) with metal ions of equal valence that are larger. By replacing small ions with larger ions, a compressive stress is generated within the above-described layer in a colored glass article manufactured from the glass composition. In multiple embodiments, such metal ions are monovalent metal ions (e.g., Li + , Na + , K + , etc.), and ion exchange is performed by immersing a colored glass article manufactured from the glass composition in a molten salt bath and replacing relatively large metal ions in at least one molten salt contained in the molten salt bath with relatively small metal ions in the colored glass article. Alternatively, ion exchange can also be performed with other monovalent ions such as Ag + , Tl + , Cu + , etc. One or more ion-exchange processes performed to strengthen a colored glass article manufactured from a glass composition can include the step of contacting the colored glass article with an ion-exchange medium. In multiple embodiments, the ion-exchange medium can be a molten salt bath. For example, the ion-exchange process can include the step of immersing in one bath, or the step of immersing in multiple baths of the same composition or different compositions (optionally, a cleaning step and / or an annealing step may be performed between immersions), but is not limited thereto.

[0307] According to multiple embodiments, the ion-exchange solution (e.g., KNO 3 and / or NaNO 3The temperature of the molten salt bath) can be 350°C or higher and 500°C or lower, 360°C or higher and 450°C or lower, 370°C or higher and 440°C or lower, 360°C or higher and 420°C or lower, 370°C or higher and 400°C or lower, 375°C or higher and 475°C or lower, 400°C or higher and 500°C or lower, 410°C or higher and 490°C or lower, 420°C or higher and 480°C or lower, 430°C or higher and 470°C or lower, further or 440°C or higher and 460°C or lower, or within any and all sub-ranges between the above values. In a plurality of embodiments, the exposure time of the colored glass article to the ion exchange solution can be 2 hours or more and 24 hours or less, 2 hours or more and 12 hours or less, 2 hours or more and 6 hours or less, 8 hours or more and 24 hours or less, 6 hours or more and 24 hours or less, 6 hours or more and 12 hours or less, 8 hours or more and 24 hours or less, further or 8 hours or more and 12 hours or less, or within any and all sub-ranges formed from each endpoint of these ranges.

[0308] In a plurality of embodiments, the compression depth achievable by performing ion exchange on a colored glass article made from a glass composition can be 10 μm or more, 20 μm or more, 30 μm or more, 40 μm or more, 50 μm or more, 60 μm or more, 70 μm or more, 80 μm or more, 90 μm or more, or 100 μm or more. In a plurality of embodiments, the colored glass article made from a glass composition has a thickness “t”, and the compression depth achievable by performing ion exchange can be 0.15t or more, 0.17t or more, or further 0.2t or more. In a plurality of embodiments, the colored glass article made from a glass composition has a thickness “t”, and the compression depth achievable by performing ion exchange can be 0.3t or less, 0.27t or less, or further 0.25t or less. In a plurality of embodiments, the colored glass article made from the glass composition described herein has a thickness “t”, and the compression depth achievable by performing ion exchange can be from 0.15t to 0.3t, from 0.15t to 0.27t, from 0.15t to 0.25t, from 0.17t to 0.3t, from 0.17t to 0.27t, from 0.17t to 0.25t, from 0.2t to 0.3t, from 0.2t to 0.27t, or further from 0.2t to 0.25t, or within any and all sub-ranges formed from the endpoints of these ranges.

[0309] By growing such a surface compression layer, an effect of improving the fracture toughness and bending strength can be obtained as compared with the non-ion-exchanged material. In the surface compression layer, the concentration of ions introduced into the colored glass article by ion exchange becomes higher than that in the main body of the colored glass article (i.e., the region where surface compression does not occur). In a plurality of embodiments, the surface compression stress after ion exchange strengthening of a colored glass article manufactured from a glass composition can be 300 MPa or more, 400 MPa or more, 500 MPa or more, or further 600 MPa or more. In a plurality of embodiments, the surface compression stress after ion exchange strengthening of a colored glass article manufactured from a glass composition can be 1 GPa or less, 900 MPa or less, or further 800 MPa or less. In a plurality of embodiments, the surface compression stress after ion exchange strengthening of a colored glass article manufactured from a glass composition can be 300 MPa or more and 1 GPa or less, 300 MPa or more and 900 MPa or less, 300 MPa or more and 800 MPa or less, 400 MPa or more and 1 GPa or less, 400 MPa or more and 900 MPa or less, 400 MPa or more and 800 MPa or less, 500 MPa or more and 1 GPa or less, 500 MPa or more and 900 MPa or less, 500 MPa or more and 800 MPa or less, 600 MPa or more and 1 GPa or less, 600 MPa or more and 900 MPa or less, 600 MPa or more and 800 MPa or less.

[0310] In multiple embodiments, the maximum central tension after ion-exchange strengthening of a colored glass article made from a glass composition can be 40 MPa or more, 60 MPa or more, 80 MPa or more, or further 100 MPa or more. In multiple embodiments, the maximum central tension after ion-exchange strengthening of a colored glass article made from a glass composition can be 250 MPa or less, 200 MPa or less, or further 150 MPa or less. In multiple embodiments, the maximum central tension after ion-exchange strengthening of a colored glass article made from a glass composition can be from 40 MPa to 250 MPa, from 40 MPa to 200 MPa, from 40 MPa to 150 MPa, from 60 MPa to 250 MPa, from 60 MPa to 200 MPa, from 60 MPa to 150 MPa, from 80 MPa to 250 MPa, from 80 MPa to 200 MPa, from 80 MPa to 150 MPa, from 100 MPa to 250 MPa, from 100 MPa to 200 MPa, or further from 100 MPa to 150 MPa, or within any and all sub-ranges formed from each endpoint of these ranges. Note that the central tension in this specification refers to the maximum central tension value unless otherwise specified.

[0311] As described herein, in multiple embodiments, by increasing the residual rate of Au, the concentration of Au in the obtained colored glass article can be increased so that the color gamut achievable in the colored glass article becomes wider, and the glass composition described herein can be formulated. In multiple embodiments, a colored glass article containing 0.01 mol% or more and 1 mol% or less of Au can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -5 or more and 25 or less (except when a* is more than -0.3 and less than 0.3), and b* is -20 or more and 5 or less (except when b* is more than -0.5 and less than 0.5). In multiple embodiments, 1×10 -6A colored glass article containing 1 mol% or more and 1 mol% or less of Au can have transmission color coordinates in the CIELAB color space where L* is 55 or more and 96.5 or less, a* is -10 or more and 25 or less (except when a* is more than -0.3 and less than 0.3), and b* is -20 or more and 5 or less (except when b* is more than -0.5 and less than 0.5).

[0312] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 60 mol% or more and 70 mol% or less of SiO 2 and 11 mol% or more and 17 mol% or less of Al 2 O 3 and 2 mol% or more and 8 mol% or less of B 2 O 3 and 9 mol% or more and 14 mol% or less of Li 2 O, 2 mol% or more and 6 mol% or less of Na 2 O, 0.1 mol% or more and 2 mol% or less of MgO, 0.1 mol% or more and 2 mol% or less of ZnO, and 1 × 10 -6 mol% or more and 0.01 mol% or less of Au. In these embodiments, MgO + ZnO is 0.1 mol% or more and 4.5 mol% or less.

[0313] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 60 mol% or more and 70 mol% or less of SiO 2 and 11 mol% or more and 17 mol% or less of Al 2 O 3 and 2 mol% or more and 8 mol% or less of B 2 O 3 and 9 mol% or more and 14 mol% or less of Li 2 O, 2 mol% or more and 6 mol% or less of Na 2 O, 0.1 mol% or more and 0.5 mol% or less of K 2 O, and 1 × 10 -6 mol% or more and 0.05 mol% or less of Au. In these embodiments, when the total of Li 2 O, Na 2 O, and K 2 O is taken as R 2 O, then R 2 O - Al 2 O 3is 0 mol% or more and 3 mol% or less.

[0314] In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain 40 mol% or more and 70 mol% or less of SiO 2 and 8 mol% or more and 20 mol% or less of Al 2 O 3 and 1 mol% or more and 10 mol% or less of B 2 O 3 and 1 mol% or more and 20 mol% or less of Li 2 O and 1 mol% or more and 15 mol% or less of Na 2 O and can contain 0 mol% or more and 8 mol% or less of MgO, 0 mol% or more and 5 mol% or less of ZnO, and 0.0005 mol% or more and 1 mol% or less of Au, and MgO + ZnO is 0.1 mol% or more and 6 mol% or less.

[0315] In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain 40 mol% or more and 70 mol% or less of SiO 2 and 8 mol% or more and 20 mol% or less of Al 2 O 3 and 1 mol% or more and 10 mol% or less of B 2 O 3 and 1 mol% or more and 20 mol% or less of Li 2 O and 1 mol% or more and 15 mol% or less of Na 2 O and can contain 0 mol% or more and 6 mol% or less of MgO, 0 mol% or more and 5 mol% or less of ZnO, and 1×10 -6 mol% or more and 1 mol% or less of Au, and MgO + ZnO is 0.1 mol% or more and 6 mol% or less.

[0316] In multiple embodiments, the glass composition and the colored glass article obtained therefrom contain 50 mol% or more and 80 mol% or less of SiO 2 and 7 mol% or more and 25 mol% or less of Al 2 O 3 and 1 mol% or more and 15 mol% or less of B 2 O 3 and 5 mol% or more and 20 mol% or less of Li 2 O and 0.5 mol% or more and 15 mol% or less of Na 2O and K of more than 0 mol% and 1 mol% or less 2 O and 1×10 -6 mol% or more and 1 mol% or less of Au and may contain Li 2 O, Na 2 O, and K 2 The total of O is R 2 When O is taken as R 2 O - Al 2 O 3 is - 5 mol% or more and 7 mol% or less.

[0317] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 50 mol% or more and 70 mol% or less of SiO 2 and 10 mol% or more and 17.5 mol% or less of Al 2 O 3 and 3 mol% or more and 10 mol% or less of B 2 O 3 and 8.8 mol% or more and 14 mol% or less of Li 2 O and 1.5 mol% or more and 8 mol% or less of Na 2 O and more than 0 mol% and 2 mol% or less of Cr 2 O 3 and may contain Li 2 O, Na 2 O, and K 2 The total of O is R 2 When O is taken as R and the total of MgO, ZnO, and CaO is taken as R'O, R 2 O + R'O - Al 2 O 3 is 0.5 mol% or more and 6 mol% or less, and Al 2 O 3 +MgO + ZnO is 12 mol% or more and 22 mol% or less.

[0318] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 50 mol% or more and 70 mol% or less of SiO 2 and 10 mol% or more and 20 mol% or less of Al 2 O 3 and 4 mol% or more and 10 mol% or less of B 2 O 3 and 7 mol% or more and 17 mol% or less of Li 2 O and 1 mol% or more and 9 mol% or less of Na2 O and SnO of 0.01 mol% or more and 1 mol% or less 2 and Ag of 0.01 mol% or more and 5 mol% or less can be included, and Li 2 O, Na 2 O, and K 2 The total of O is designated as R 2 When O is designated as R 2 O - Al 2 O 3 is more than 0.2 mol% and 5.00 mol% or less.

[0319] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 50 mol% or more and 70 mol% or less of SiO 2 and 10 mol% or more and 20 mol% or less of Al 2 O 3 and 1 mol% or more and 10 mol% or less of B 2 O 3 and 7 mol% or more and 14 mol% or less of Li 2 O and 0.01 mol% or more and 8 mol% or less of Na 2 O and 0.01 mol% or more and 1 mol% or less of K 2 O and can contain 0 mol% or more and 7 mol% or less of CaO and 0 mol% or more and 8 mol% or less of MgO, and Li 2 O + K 2 O + Na 2 O + CaO + MgO + ZnO is 25 mol% or less. And further, CuO + NiO + Co 3 O 4 + Cr 2 O 3 is 0.001 mol% or more, CeO 2 is 0.1 mol% or more, and at least one of TiO 2 being 0.1 mol% or more holds.

[0320] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom contain 53 mol% or more and 66 mol% or less of SiO 2 and 9 mol% or more and 18 mol% or less of Al 2 O 3 and 0 mol% or more and 15 mol% or less of B 2 O 3 and 0 mol% or more and 3 mol% or less of P2 O 5 and Li of 0 mol% or more and 16 mol% or less 2 O and Na of 0 mol% or more and 15 mol% or less 2 O and K of 0 mol% or more and 5 mol% or less 2 O, MgO of 0 mol% or more and 6 mol% or less, CaO of 0 mol% or more and 6 mol% or less, ZnO of 0 mol% or more and 3 mol% or less, and TiO of 0 mol% or more and 2 mol% or less 2 and CeO of more than 0 mol% and 2 mol% or less 2 and Fe of 0 mol% or more and 1 mol% or less 2 O 3 and SnO of 0 mol% or more and 0.5 mol% or less 2 and SO of 0 mol% or more and 0.05 mol% or less 3 and WO of 0 mol% or more and 1 mol% or less 3 and Nb of 0 mol% or more and 1 mol% or less 2 O 5 and Bi of 0 mol% or more and 1 mol% or less 2 O 3 and MoO of 0 mol% or more and 1 mol% or less 3 and La of 0 mol% or more and 3 mol% or less 2 O 3 and can include, TiO 2 +CeO 2 is 0.2 mol% or more, and Li 2 O+Na 2 O is 8 mol% or more.

[0321] In a plurality of embodiments, the glass composition and the colored glass article obtained therefrom include SiO of 50 mol% or more and 70 mol% or less 2 and Al of 10 mol% or more and 20 mol% or less 2 O 3 and B of 1 mol% or more and 10 mol% or less 2 O 3 and Li of 7 mol% or more and 14 mol% or less 2 O and Na of more than 0 mol% and 8 mol% or less 2 O and K of 0 mol% or more and 1 mol% or less 2 O, CaO of 0 mol% or more and 7 mol% or less, MgO of 0 mol% or more and 8 mol% or less, and Er of more than 0 mol% and 4 mol% or less 2 O3 and Nd of more than 0 mol% and 4 mol% or less 2 O 3 can include at least one of them.

[0322] In a plurality of embodiments, the average CTE of the colored glass article is about 85×10 -7 C -1 less than, about 80×10 -7 C -1 less than, about 75×10 -7 C -1 less than, about 70×10 -7 C -1 less than, about 65×10 -7 C -1 less than, further or about 60×10 -7 C -1 can be less than. By setting the CTE to such a relatively low value, the durability of the glass against thermal cycle conditions and thermal stress conditions is improved as compared to an article having a relatively high CTE value.

[0323] In a plurality of embodiments, the colored glass article described herein can typically have a strain point of about 400°C or more and about 550°C or less.

[0324] In a plurality of embodiments, the colored glass article described herein can typically have an annealing point of about 450°C or more and about 650°C or less.

[0325] In a plurality of embodiments, the colored glass article described herein can typically have a softening point of about 700°C or more and about 900°C or less.

[0326] The colored glass articles described in this specification can be used for various applications. Such applications include, for example, the housings of consumer electronic devices, glass applications for construction, glass applications for automobiles and vehicles, or applications for business and household electrical appliances. In multiple embodiments, the colored glass articles described in this specification can be included in consumer electronic devices (such as smartphones, tablet computers, watches, personal computers, ultrabooks, televisions, cameras, etc.), architectural glass, and / or automotive glass.

[0327] Figures 1 and 2 show exemplary articles incorporating any of the colored glass articles disclosed in this specification. Specifically, Figures 1 and 2 show a consumer electronic device 100. The consumer electronic device 100 includes a housing 102 having a front surface 104, a back surface 106, and side surfaces 108, electrical components (not shown) at least partially or entirely housed inside the housing and including a controller, a memory, and a display 110 provided on the front surface of the housing or adjacent thereto, and a cover substrate 112 provided on the front surface of the housing to cover the display or covering the front surface. In multiple embodiments, at least a part (for example, the back surface 106) of the housing 102 can be provided with any of the glass articles disclosed in this specification.

Examples

[0328] Hereinafter, examples are given to illustrate various embodiments of the colored glass articles described in this specification so that various embodiments can be more easily understood.

[0329] Heat treatment - For the examples shown below, heat treatment was performed including steps of placing the glass article between SiC setters, placing the glass article in a furnace, heating the furnace to a specified heat treatment temperature at a rate of 4 °C / min, and cooling from the heat treatment temperature at a cooling rate of 3 °C / min after the heat treatment time has elapsed.

[0330] Table 1 shows the batch compositions (mol%) used to form Comparative Examples 1 and 2 and Examples 1 to 30. Table 1 also shows the heat treatments performed to produce the colored glass articles from these batch compositions and the Au concentration analysis results (mol%) of the obtained colored glass articles.

[0331]

Table 1-1

[0332]

Table 1-2

[0333]

Table 1-3

[0334]

Table 1-4

[0335]

Table 1-5

[0336]

Table 1-6

[0337] Referring to Table 1, Examples 1 to 3 were formed from the same glass composition by varying the melting temperature. The Au residual rate of Example 1 melted at 1550 °C was 18.0%. The Au residual rate of Example 2 melted at 1500 °C was 34.0%, and the Au residual rate of Example 3 melted at 1450 °C was 36.0%. As shown in Examples 1 to 3, the lower the melting temperature, the higher the Au residual rate. Therefore, in order to increase the Au residual rate during the treatment, it is considered desirable to form a glass composition with a lower melting point.

[0338] Also, for Comparative Examples 1 and 2, the Au residual ratio after melting at 1450°C for 18 hours was 13.0% for Comparative Example 1 and 11.5% for Comparative Example 2. Except for containing MgO and ZnO, Example 4 was the same as Comparative Example 1, and Example 5 was the same as Comparative Example 2. The Au residual ratio after melting at 1450°C for 18 hours was 30.0% for Example 4 and 21.5% for Example 5. As shown by Comparative Examples 1, 2 and Examples 4, 5, by including MgO and ZnO in the glass composition, the Au residual ratio of the obtained colored glass article becomes higher.

[0339] For Example 6, the Au residual ratio after melting at 1550°C for 18 hours was 26.0%. On the other hand, for Example 7 which was the same as Example 6 except for containing 2 ZrO 2 the Au residual ratio after melting at 1550°C for 18 hours was 36.0%. As shown by Examples 6 and 7, by including ZrO

[0340] P 2 O 5 in addition to MgO and ZnO in the glass composition, the Au residual ratio of the obtained colored glass article becomes higher. 2 O 5 For Example 8 which was the same as Example 6 except for containing P

[0341] ZrO 2 and for Example 9 which was the same as Example 7 except for containing SnO 2 the Au residual ratio after melting at 1550°C for 18 hours decreased to 12.0% for Example 8 and 14.0% for Example 9 respectively. As shown by Examples 6 - 9, by including P 2 O 2 in the glass composition, the Au residual ratio of the obtained colored glass article decreases.

[0342] For Examples 14 and 17, the Au residue ratios after melting at 1550°C for 18 hours were 18.0% for Comparative Example 14 and 20.0% for Comparative Example 17. SnO 2 Except for the inclusion of SnO, Example 15 was the same as Example 14, and Example 18 was the same as Example 17. The Au residue ratios after melting at 1550°C for 18 hours were 20.0% for Example 15 and 22% for Example 18. As shown in Examples 15 and 18, by including SnO 2 in addition to MgO and ZnO in the glass composition, the Au residue ratio of the resulting colored glass article becomes higher.

[0343] Furthermore, for Examples 16 and 19 containing ZrO 2 and SnO 2 , the Au residue ratios after melting at 1550°C for 18 hours were relatively high values of 24.0% and 28.0% respectively. As shown in Examples 16 and 19, by including SnO 2 in addition to MgO, ZnO, and ZrO 2 in the glass composition, the Au residue ratio of the resulting colored glass article becomes higher.

[0344] Fe 2 O 3 For Examples 23 and 24 containing Fe 2 O, the Au residue ratios after melting at 1550°C for 18 hours were relatively high values of 32.0% and 34.0% respectively. As shown in Exampl...

Claims

1. SiO of 50 mol% or more and 80 mol% or less ２ and 7 mol% or more and 20 mol% or less of Al ２ O ３ and B of 1 mol% or more and 15 mol% or less ２ O ３ and 1 mol% or more and 20 mol% or less of Li ２ O and More than 0 mol% and 15 mol% or less of Na ２ O, and CaO of 0.25 mol% or more, and K₂O of 1 mol% or less, contained, R of 1 mol% or more and 35 mol% or less ２ O, where Li ２ O, Na ２ O, and K ２ O is the total of R ２ O, and 1 × 10 －６ A colorant of more than 1 mol% and 5 mol% or less, which contains at least one of Cr ２ O ３ , CuO, NiO, Co ３ O ４ , and TiO₂, and A colored glass article containing 12 mol% or more and 24 mol% or less of (Al ２ O ３ +MgO+CaO+ZnO), the colored glass article has a thickness within the range of 0.4 mm or more and 5 mm or less, the colored glass article has a surface compressive stress of 200 MPa or more and a central tensile stress of 60 MPa or more, the colored glass article has a dielectric constant within the range of 5.6 to 6.4 at a frequency of 10 GHz before chemical strengthening treatment. A colored glass article.

2. The transmission color coordinates in the CIE Lab color space of the glass of the colored glass article measured under the conditions of F2 illumination and a 10° field of view standard observer at the thickness of the colored glass article are an L* value of 55 or more and 96.5 or less, an a* value of more than -0.3 and less than 0.3 excluded, an a* value of -35 or more and 60 or less, and a b* value of more than -0.5 and less than 0.5 excluded, a b* value of -90 or more and 80 or less. The colored glass article according to claim 1, comprising:

3. The average transmittance of the glass of the colored glass article in the wavelength range of 380 nm to 750 nm at the thickness of the colored glass article is 10% or more and 92% or less. The colored glass article according to claim 2.

4. The transmission color coordinates in the CIE Lab color space of the glass having the same composition as the colored glass article measured under the conditions of F2 illumination and a 10° field of view standard observer at a thickness of 2.06 mm are an L* value of 55 or more and 96.5 or less, an a* value of more than -0.3 and less than 0.3 excluded, an a* value of -35 or more and 60 or less, and a b* value of more than -0.5 and less than 0.5 excluded, a b* value of -90 or more and 80 or less. The colored glass article according to claim 1, comprising:

5. The transmission color coordinates in the CIE Lab color space of the glass of the colored glass article measured under the conditions of F2 illumination and a 10° field of view standard observer at the thickness of the colored glass article are an L* value of 55 or more and 96.5 or less, an a* value with |a*|≥0.3, and a b* value with |b*|≥0.

5. The colored glass article according to claim 1, comprising:

6. The transmission color coordinates in the CIE Lab color space of the glass having the same composition as the colored glass article measured under the conditions of F2 illumination and a 10° field of view standard observer at a thickness of 2.06 mm are an L* value of 55 or more and 96.5 or less, an a* value with |a*|≥0.3, and a b* value with |b*|≥0.

5. The colored glass article according to claim 1, comprising:

7. SiO of 50 mol% or more and 80 mol% or less ２ and Al of 13 mol% or more and 20 mol% or less ２ O ３ and 1 mol% or more and 20 mol% or less of Li ２ O, and Na of more than 0 mol% and 15 mol% or less ２ and CaO of 0.25 mol% or more, and contained, R of 1 mol% or more and 35 mol% or less ２ O, where Li ２ O, Na ２ O, and K ２ O is the total of R ２ O, and Greater than 1×10 －６ A colorant of more than 1 mol% and 5 mol% or less, comprising Cr ２ O ３ , CuO, NiO, Co ３ O ４ , TiO ２ , CeO ２ A colorant containing at least one of them, and A colored glass article containing 12 mol% or more and 24 mol% or less of (Al ２ O ３ +MgO+CaO+ZnO), The colored glass article has a thickness in the range of 0.4 mm or more and 5 mm or less, the transmission color coordinates in the CIE Lab color space of the colored glass article measured under the conditions of F2 illumination and a 10° field-of-view standard observer at the thickness of the colored glass article include an L* value of 55 or more and 96.5 or less, an a* value with |a*| ≥ 0.3, and a b* value with |b*| ≥ 0.5, the colored glass article has a surface compressive stress of 200 MPa or more and a central tensile stress of 60 MPa or more, the colored glass article has a dielectric constant in the range of 5.6 to 6.4 at a frequency of 10 GHz before chemical strengthening treatment.

8. The colored glass article contains Li of 7 mol% or more and 18 mol% or less. ２ The colored glass article according to claim 7, which contains O.

9. The colored glass article contains 0.01 mol% or more and 12 mol% or less of Na ２ O, and the colored glass article according to claim 8.

10. The colored glass article contains 1 mol% or more and 12 mol% or less of B ２ O ３ The colored glass article according to claim 9, which contains

11. The glass constituent components of the colored glass article satisfy the inequality [5.72 * Al ２ O ３ (mol%) - 21.4 * ZnO (mol%) - 2.5 * P ２ O ５ (mol%) - 35 * Li ２ O (mol%) - 16.6 * B ２ O ３ (mol%) - 20.5 * MgO (mol%) - 23.3 * Na ２ O (mol%) - 27.9 * SrO (mol%) - 18.5 * K ２ O (mol%) - 26.3 * CaO (mol%)] > -609 mol%, and the colored glass article according to claim 10, wherein the glass is configured to satisfy this condition.

12. SiO of 50 mol% or more and 80 mol% or less ２ and 7 mol% or more and 20 mol% or less of Al ２ O ３ and B of 1 mol% or more and 15 mol% or less ２ O ３ and 1 mol% or more and 20 mol% or less of Li ２ O, and More than 0 mol% and 15 mol% or less of Na ２ O, and 0.25 mol% or more of CaO, 1 mol% or less of K2O, and R of 1 mol% or more and 35 mol% or less ２ O, where Li ２ O, Na ２ O, and K ２ O is the total of R ２ O, and 1 × 10 －６ a colorant of more than 1 × 10 －６ mole % and 5 mole % or less, the colorant containing at least one transition metal, and A colored glass article containing 12 mol% or more and 24 mol% or less of (Al ２ O ３ +MgO+CaO+ZnO), the colored glass article has a thickness in the range of 0.4 mm or more and 5 mm or less, the transmission color coordinates in the CIE Lab color space of the colored glass article measured under the conditions of F2 illumination and a 10° field-of-view standard observer at the thickness of the colored glass article include an L* value of 55 or more and 96.5 or less, an a* value with |a*| ≥ 0.3, and a b* value with |b*| ≥ 0.5, the colored glass article has a surface compressive stress of 200 MPa or more and a central tensile stress of 60 MPa or more, the colored glass article has a dielectric constant in the range of 5.6 to 6.4 at a frequency of 10 GHz before chemical strengthening treatment.

13. The colored glass article according to claim 12, wherein the colorant contains at least one transition metal and / or rare earth metal selected from the group consisting of Ni, Co, Cr, Cu, Ce, Ti, V, Mn, Nb, Mo, Hf, W, Nd, and Er.

14. The colored glass article according to claim 13, wherein the colorant contains at least one transition metal and / or rare earth metal selected from the group consisting of Cr, Cu, Ni, Co, Ti, and Ce.

15. the colorant further contains 1 mol% or less of a cation "M", "M" is at least one of F, Cl, Br, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Se, Nb, Mo, Ru, Rh, Pd, Cd, In, Te, W, Ir, Pt, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, and Er, and

16. SiO of 50 mol% or more and 80 mol% or less ２ and Al of 13 mol% or more and 20 mol% or less ２ O ３ and B of 1 mol% or more and 15 mol% or less ２ O ３ and Li of 1 mol% or more and 20 mol% or less ２ O and More than 0 mol% and 15 mol% or less of Na ２ O, and 0.25 mol% or more of CaO, and R of 1 mol% or more and 35 mol% or less ２ O, and Li ２ O, Na ２ O, and K ２ O which is the total of ２ O, and 1 × 10 －６ A colorant of more than 1 mol% and 5 mol% or less, containing Cr ２ O ３ , CuO, NiO, Co ３ O ４ , TiO ２ , CeO ２ A colorant containing at least one of them, and A colored glass article containing 12 mol% or more and 24 mol% or less of (Al ２ O ３ +MgO+CaO+ZnO), The colored glass article has a thickness in the range of 0.4 mm or more and 5 mm or less, the transmission color coordinates in the CIE Lab color space of the colored glass article measured under the conditions of F2 illumination and a 10° field of view standard observer at the thickness of the colored glass article include an L* value of 55 or more and 96.5 or less, an a* value with |a*| ≥ 0.3, and a b* value with |b*| ≥ 0.5, the colored glass article has a dielectric constant in the range of 5.6 to 6.4 at a frequency of 10 GHz before chemical strengthening treatment. A colored glass article.

17. The colored glass article according to claim 16, wherein the colored glass article has surface compressive stress and central tensile stress.

18. The colored glass article according to claim 17, wherein the surface compressive stress is 200 MPa or more.

Images