Method for manufacturing decorative mirror and decorative mirror

Abstract

To provide a decorative mirror in which a high-quality image is printed in color on a glass surface.SOLUTION: A glass base material GL1 provided with a transparent or translucent primer layer 10, a UV curable color ink layer 11 printed on the primer layer 10 and a UV curable white ink layer 12 partially printed on the color ink layer 11 is combined with another glass base material GL2 provided with a reflecting layer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a decorative mirror having a high-quality image printed in color on the glass surface, and a method for manufacturing the same. [Background technology]

[0002] The present applicant has previously proposed a decorative mirror in which a high-quality image is printed in color on the glass surface, and this product has been well received (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-165031 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the applicant considered further improvements to enhance the impact of the mirror as a decorative piece and to improve its quality. Specifically, various studies were conducted with the aim of making the mirror more resistant to surface scratches and further enhancing the three-dimensional effect. The applicant also researched a structure that changes the way the mirror shines depending on the viewing angle.

[0005] The present invention is based on the above-mentioned considerations, and aims to provide a more innovative decorative mirror in which a high-quality image is printed in color on the glass surface, and a method for manufacturing such a decorative mirror. [Means for solving the problem]

[0006] In order to achieve the above-mentioned objectives, the inventors conducted research and discovered that glass is the best material for increasing the strength and gloss of the outer surface of a decorative mirror, and that the same three-dimensional effect can be obtained even if the layered structure of the white ink and color ink is reversed, which led to the present invention.

[0007] That is, the manufacturing method of the decorative mirror according to the first invention is a decorative mirror that is constructed by combining an auxiliary substrate provided with a reflective layer with a glass substrate, and the glass substrate is viewed from the back side. The method includes the following steps: a polishing step in which the surface of the glass substrate, which contains 60 to 80 wt% silicon dioxide (SiO2) and 2 to 20 wt% calcium oxide (CaO) as constituent materials, is polished to an arithmetic mean roughness Ra = 0.0007 to 0.0025 μm; a color printing step in which color ink is printed on the glass substrate after the polishing step and then cured with ultraviolet light to form a color ink layer on the glass substrate after the polishing step, or on the glass substrate after the polishing step that has not undergone the primer step, and then cured with ultraviolet light; and an additional printing step in which white ink is partially printed on the glass substrate after the color printing step and then cured with ultraviolet light to form a white ink layer in key areas of the design.

[0008] In addition, the decorative mirror of the first invention is constructed by combining an auxiliary substrate with a reflective layer with a glass substrate, and in this decorative mirror, the glass substrate is viewed from the back side. The glass substrate is composed of 60 to 80 wt% silicon dioxide (SiO2) and 2 to 20 wt% calcium oxide (CaO) as constituent materials, and its surface is polished to an arithmetic mean roughness Ra = 0.0007 to 0.0025 μm before use. It is composed of a color ink layer made of ultraviolet-curing ink and an ink layer laminated on the color ink layer, which is a white ink layer made of ultraviolet-curing ink printed in a key area of ​​the design. The color ink layer is formed directly on the glass substrate after polishing, or is formed by laminating it on a transparent or translucent primer layer formed on the glass substrate after polishing (see the first embodiment).

[0009] The color printing process and the additional printing process can also be reversed. In this case, the decorative mirror of the second invention manufactured is composed of an auxiliary substrate provided with a color ink layer combined with a glass substrate provided with a reflective layer. In the decorative mirror that is viewed from the surface side of the glass substrate, the glass substrate is composed of constituent materials containing 60 to 80 Wt% of silicon dioxide (SiO2) and 2 to 20 Wt% of calcium oxide (CaO), and its surface is polished to an arithmetic mean roughness Ra = 0.0007 to 0.0025 μm before use, and the design The glass substrate is constructed of a white ink layer made of ultraviolet-curable ink that is printed in a key area of ​​the glass substrate, and a color ink layer made of ultraviolet-curable ink that is printed on top of the white ink layer in the key area of ​​the design, while being printed without being on top of the white ink layer in the non-key area of ​​the design. The white ink layer is formed directly on the surface of the glass substrate after polishing, or is formed by being on top of a transparent or translucent primer layer that has been formed on the glass substrate after polishing (see Example 2).

[0010] In either configuration, the present invention has the effect of laminating a white ink layer on key areas of the design, making the key areas appear slightly raised through the thickness of the glass plate. Here, either a plastic material or a glass material can be used as the auxiliary substrate, but glass is preferred because of its excellent gloss and strength. In particular, the auxiliary substrate of the second invention is preferably a glass substrate that is polished in the same way as the glass substrate to be viewed and that is similarly color-printed.

[0011] In either configuration, the color printing step and the additional printing step are preferably performed using one or more inkjet printers.More preferably, the priming step is also performed using an inkjet printer.

[0012] By inkjet printing the primer, it is possible to arbitrarily form exposed areas of the glass mirror surface where no primer layer is present (i.e., exposed glass areas). In other words, by inkjet printing the primer, it is possible to form exposed glass areas of any shape, even for fine and complex patterns such as letters or logos. This also applies to color printing processes.

[0013] In the present invention, inkjet printing can be used to designate appropriate positions as non-printing areas in the primer process and / or color printing process. The non-printing areas are preferably formed in a roughly round or star-shaped, scattered granular pattern. More preferably, the corresponding scattered granular positions should be designated as non-printing areas in the primer process and color printing process.

[0014] In this case, the non-printed areas allow light to pass through, so the light reflected from the reflective layer is visible when viewed from the front or a similar viewpoint. However, the reflected light is not visible when the viewing position is changed from the front, so by changing the viewing angle, a sparkling effect like the twinkling of stars can be achieved.

[0015] Taking the above effects into consideration, the areas around the main regions (typically character areas) in the color printing process are given colors and images suitable for creating a sparkling reflected light. Typically, dark blue colors are selected to create the appearance of a night sky, or blue-based colors to create the appearance of reflected light from bright seawater or freshwater surfaces. Then, in the primer process and color printing process, corresponding scattered dot positions are made into granular non-printed areas, thereby ensuring a path for the reflected light to pass through, thereby achieving a sparkling light effect. Here, "corresponding positions" does not necessarily mean exactly the same positions, but rather a positional relationship that ensures a path for the reflected light to pass through is sufficient.

[0016] In any case, the area of ​​the scattered dots should be a size appropriate for the sparkling effect, and should be sufficiently small compared to the main area of ​​the design and the total area of ​​the decorative mirror. The area of ​​each scattered dot is typically 1 / 23,000 or less (e.g., 2 mm x 2 mm or less) of the total area of ​​the decorative mirror (e.g., B4 size 257 x 364 mm).

[0017] In general, inkjet printers apply pressure and heat to turn ink into fine particles, which are then sprayed onto a printing substrate. However, in the present invention, it is preferable to employ a configuration in which an ultraviolet curing process is performed immediately after the printing process. After ultraviolet curing, the ink preferably has a pencil hardness of about 3H based on JIS K-5400 8.4.

[0018] In any case, in the present invention, since the glass substrate is polished in a polishing step, even slight oil stains and fingerprints that are not visible to the naked eye can be reliably removed, and the quality of the final finish is significantly improved. However, if the polishing step is not performed, stains that are not visible to the naked eye may be lifted by the influence of the ink printed thereafter.

[0019] In addition, in the present invention, the glass substrate to be subjected to the color printing process preferably has a nominal thickness of 3 mm (actual measured value of approximately 2.7 mm to 3.3 mm) or a nominal thickness of 5 mm (actual measured value of approximately 4.7 mm to 5.3 mm), and a nominal thickness of approximately 2.0 mm to 8.0 mm, and optimally, a nominal thickness of approximately 3 mm, should be selected.

[0020] If the glass thickness is thinner than the nominal value of 2 mm (actual measured value is approximately 1.7 to 2.3 mm), the floating effect will be somewhat lacking and there will be strength problems. On the other hand, if the glass thickness is 8 mm or more, it will be heavy and will look somewhat unnatural.

[0021] However, in the present invention, the decorative mirror is formed by polymerizing the glass substrate and the auxiliary substrate, so from the perspective of reducing weight, the thickness of the glass substrate can be made 2 mm or less (preferably 1 mm or less), and the thickness can also be made as thin as about 0.3 mm.

[0022] The white ink is not particularly limited, but is preferably one containing 40 to 60 wt% of a photosensitive resin, 10 to 20 wt% of an acrylic ester, and 5 to 10 wt% of a phosphine oxide derivative. Suitable examples of the acrylic ester include ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and 2-hydroxyethyl acrylate.

[0023] Furthermore, the white ink should preferably contain titanium oxide as a pigment. However, since a white ink of this composition has poor adhesion to glass, it is essential to provide a primer layer on the glass substrate to prevent peeling. Note that poor adhesion to glass is not limited to white ink, but applies to other color inks as well.

[0024] The primer is not particularly limited as long as it has excellent adhesion to glass, but preferably, a primer containing acrylic esters, photosensitive resin, and phosphine oxide derivatives in a total amount of 98 to 99.9 wt % is selected. It is also preferable that the primer further contains a polymerization inhibitor.

[0025] In either case, the primer layer should be transparent or translucent, and since the primer layer is transparent or translucent, it is possible to create a difference in three-dimensional effect between the main area of ​​the design drawn on the upper or lower surface of the white ink layer and the background area of ​​the design where no white ink layer is provided. In other words, the slightly transparent background area and the non-transparent main area are visually clearly distinguished, so the main area is more clearly appealing. The main area is, for example, a display area for an anime character, and is preferably located approximately in the center of the glass surface, with the surrounding area being the background.

[0026] The thickness of the white ink film is not particularly limited, but is preferably 20 μm to 50 μm, and more preferably about 30 μm. By providing a film thickness of this order, a three-dimensional effect can be emphasized.

[0027] In either case, in the present invention, a color image is printed on the glass surface except for the exposed glass portion. For example, in the first embodiment, when the glass surface before color printing is viewed in plan, the glass surface is divided into a primer layer and an exposed glass portion where no primer is present, and after color printing, a white ink layer is provided over the color print layer.

[0028] In the second embodiment, when the glass surface is viewed from above before color printing, the glass surface is divided into a primer layer, an exposed glass area where no primer is present, and a white ink layer laminated on the primer layer. In the second embodiment, a color image is printed on the primer layer and the white ink layer, excluding the exposed glass area. The color ink film thickness should be 20 μm to 50 μm, and more preferably, about 30 μm.

[0029] The color inks used in the color printing process include at least cyan, magenta, yellow, and black inks. These inks are not particularly limited as long as they are ultraviolet (UV) curable inks. A cyan ink is preferably selected that contains 1-20 wt% of a photosensitive resin, 60-90 wt% of an acrylic acid ester, and 1-20 wt% of a phosphine oxide derivative as its main components, and 1-5% of a pigment. The pigment is preferably a copper compound. The ink should also contain a photopolymerization initiator and a polymerization inhibitor.

[0030] The photopolymerization initiator is a component that generates active species upon receiving light and initiates the polymerization reaction of the photopolymerizable monomer, and examples thereof include radical photopolymerization initiators, cationic photopolymerization initiators, etc. In addition, in the present invention, by including a polymerization inhibitor, it is possible to suppress the polymerization of the photopolymerizable monomer to a high level, thereby improving the storage stability and durability of the ink.

[0031] The same applies to magenta ink and yellow ink, and these inks should also preferably contain a photopolymerization initiator and a polymerization inhibitor. Furthermore, the magenta ink is preferably selected from inks whose main components are 1-20 wt% of a photosensitive resin, 60-90 wt% of an acrylic acid ester, and 1-20 wt% of a phosphine oxide derivative, with the magenta ink containing 1-5% of a magenta colorant, and the yellow ink containing a nickel compound pigment.

[0032] The black ink contains 1 to 5% carbon black as a coloring material, and preferably contains a photopolymerization initiator and a polymerization inhibitor, and preferably contains 1 to 10 wt% photosensitive resin, 60 to 90 wt% acrylic esters, and 5 to 10 wt% phosphine oxide derivatives.

[0033] In addition, an appropriate protective layer or anti-reflection layer may be applied to the entire glass surface after the additional printing process in the first embodiment, or the entire glass surface after the color printing process in the second embodiment. To enhance the overall color and luster of the design, printing a 30 μm thick gloss material over the entire glass surface is effective as a substitute for a protective layer. Preferably, the gloss material is also UV-curable, and the hardness after UV curing is preferably approximately 3H pencil hardness based on JIS K-5400 8.4.

[0034] The glass substrate is not particularly limited as long as its constituent materials are 60 to 80 wt% silicon oxide (SiO2) and 2 to 20 wt% calcium oxide (CaO), but it is preferable to use a glass material with a total of 60 to 80 wt% silicon oxide (SiO2), 0 to 7 wt% aluminum oxide (Al2O3), 2 to 18 wt% calcium oxide (CaO), 0 to 8 wt% magnesium oxide (MgO), and 5 to 25 wt% sodium oxide (Na2O) and potassium oxide (KO).

[0035] Here, the content of iron oxide (Fe2O3) should be kept below 1 wt%, and if the content is kept below 0.05 wt%, it is possible to produce a product with high transparency and an even more luxurious feel.

[0036] To enhance the sense of luxury, it is preferable to provide a transfer process in which metal foil is thermally transferred to the required position following the additional printing process of the first embodiment or the color printing process of the second embodiment. In this case, a metal foil sheet with metal foil evenly adhered thereto is placed over the color ink layer, and the metal foil is thermally transferred by irradiating the metal foil sheet with a spot-like laser beam. It is also preferable to transfer the metal foil using heat and pressure instead of laser beam. In these cases, the color ink layer is already laminated on the glass substrate, so the metal foil can be thermally transferred. [Effects of the Invention]

[0037] According to the present invention described above, it is possible to realize a decorative mirror having a high-quality image printed in color on the glass surface. [Brief explanation of the drawings]

[0038] [Figure 1] 3 is a diagram illustrating a manufacturing method according to the first embodiment. [Figure 2] 1 is a diagram illustrating a decorative mirror according to a first embodiment. [Figure 3] 10 is a diagram illustrating a decorative mirror according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0039] The manufacturing method of the decorative mirror of the embodiment will be described in more detail below, but the specific description does not limit the present invention in any way. First, FIG. 1(a) is a flow diagram showing a manufacturing method according to the first embodiment, and FIGS. 1(b) and 1(c) are cross-sectional views showing a glass substrate GL1 completed using glass G1 of a predetermined composition and an auxiliary substrate GL2 completed using glass G2 of the same composition. The thickness of these glasses G1 and G2 is not particularly limited, but a nominal value of 3 mm (actual measured value approximately 2.7 mm to 3.3 mm) is preferably selected. The composition of each glass G1 and G2 is as described above.

[0040] As shown in Fig. 1(c), a reflective layer Rf made of aluminum or silver is formed on the rear glass surface of the auxiliary substrate GL2. The reflective layer Rf is formed by, for example, vacuum deposition, but the manufacturing process of the auxiliary substrate GL2 is publicly known and is not shown in Fig. 1(a).

[0041] The manufacturing process of the glass substrate GL1 will be explained below. Glass G1 of a predetermined composition is brush-washed with warm water to remove surface dirt (ST10), and then cut to an appropriate size (ST11). The cut size is not particularly limited, but preferably sizes of approximately A2 (420 × 594 mm), A3 (297 × 420 mm), A4 (210 × 297 mm), B5 (182 × 257 mm), or B4 (257 × 364 mm) are selected.

[0042] After the cutting process (ST11) described above, the glass G1 is polished and cleaned using cesium (ST12). Specifically, the glass surface that will become the printing surface is polished using cerium oxide particles with a particle size of approximately 1.2 to 1.4 μm. As a result of this polishing process, the glass surface is completely cleaned, including any fine glass powder generated during the cutting process that has adhered to the glass surface. Fingerprints and other oily contaminants are also completely removed.

[0043] The arithmetic mean roughness (Ra) of the glass surface after polishing is about 0.0007 to 0.0025 μm, preferably 0.0011 to 0.0020 μm, and more preferably 0.0011 to 0.0016 μm.

[0044] Next, a transparent primer layer 10 is formed on the flattened glass G1 by inkjet printing to a thickness of about 30 μm (ST13). Note that the processes of steps ST13 to ST15 described below are also performed using an inkjet printer.

[0045] In either case, the primer layer 10 is not provided on the entire surface of the glass G1, but is formed by leaving at least a fine round grain pattern or a star grain pattern HO in a scattered pattern. That is, the primer layer 10 of this embodiment is formed by removing predefined unnecessary portions.

[0046] Next, a color image original depicting an anime character or the like is subjected to appropriate color correction, and a color ink layer 11 is formed on the top surface of the primer layer 10 based on the color-corrected image original (ST14). In this color printing process, cyan, magenta, yellow, and black inks are used, all of which are ultraviolet-curable inks.

[0047] After each part is inkjet printed in an appropriate color, ultraviolet light is applied to complete the color ink layer 11, which is approximately 30 μm thick. This color ink layer 11 is also formed with fine scattered round and star patterns HO, and these non-printed areas HO correspond to the non-printed areas HO in the primer layer 10 and form light passage holes.

[0048] Next, the main area where characters or the like are drawn is printed with white ink, and is layered on the color ink layer 11 to form a white ink layer 12. As a result, a white ink layer 12 of about 30 μm is formed by layering it on the main area of ​​the color ink layer 11 (ST15). In the processing of step ST15, ultraviolet-curable white ink is also used, and after the main area is inkjet-printed in white, the main area is quickly ultraviolet-cured by irradiating it with ultraviolet light.

[0049] Incidentally, in the main regions, non-printed regions HO are usually not provided in the primer layer 10, color ink layer 11, and white ink layer 12. However, this is not intended to be limiting, and for example, in areas where a sparkling effect is effective, such as the center of a character's eyeballs or sweat dripping from a character, non-printed regions HO are provided in the primer layer 10, color ink layer 11, and white ink layer 12 in a corresponding manner. Note that this non-printed region HO does not need to be a very small area, and can of course be formed with an appropriate area.

[0050] Next, if necessary, metal foil is thermally transferred onto the UV-cured color ink layer 11 (ST16). Specifically, the glass substrate GL1 processed in step ST15 is placed in a thermal transfer machine, and a metal foil sheet is placed where the metal foil is to be transferred. Then, position data indicating the transfer position is sent from a personal computer, and laser light is irradiated onto the required location, thermally transferring the metal foil of the metal foil sheet onto the color ink (ST16). By thermally transferring the metal foil, for example, letters, symbols, logos, etc. are drawn near one of the four corners of the glass surface.

[0051] As described above, in the first embodiment, the color printing process (ST15) is followed by the additional printing process (ST14), so that key areas of the design appear slightly raised through the thickness of the glass plate. Furthermore, the polishing process (ST12) is performed first, so there is no risk of unintended patterns appearing. Furthermore, a sparkling effect can be created in scattered grains or in the center of the character's eyeballs.

[0052] The glass substrate GL1 thus completed is combined with an auxiliary substrate GL2 to form a completed decorative mirror. Figure 2(a) shows the glass substrate GL1 stacked upside down on an auxiliary substrate G12, with the reflective layer Rf of the auxiliary substrate G2 facing downward. In this overlapped state, the edges of the glass substrate GL1 and auxiliary substrate GL2 are fixed with an appropriate holder (rectangular frame) FX, and the glass substrate GL1 and auxiliary substrate GL2 are integrated to form the completed decorative mirror. Since the ink layer of this decorative mirror is not exposed, there is no risk of damage such as scratches or stains. In this configuration, the glass substrate GL1 and auxiliary substrate GL2 are in contact with each other, but it is preferable to integrate them while ensuring breathability so that the facing space is not sealed.

[0053] On the other hand, it is also preferable to fix the glass substrate GL1 and the auxiliary substrate GL2 in a non-contact state, and it is also preferable to place an appropriate rectangular frame AX inside the holder FX to integrate the glass substrate GL1 and the auxiliary substrate GL2 in a non-contact state. When this configuration is adopted, the three-dimensional effect is further enhanced. Furthermore, in the configuration of the first embodiment, the white ink layer 12 and the color ink layer 11 are not exposed, so the polishing step (ST12) and the primer step (ST13) can be omitted. By adopting such a configuration, it is possible to simplify the manufacturing process and reduce manufacturing costs.

[0054] The above describes the first embodiment in which an additional printing process is performed after the color printing process, but it is also preferable to apply a white ink layer and then a color ink layer. Figure 3(b) shows the decorative mirror of this second embodiment in its completed state, which is composed of a glass substrate GL1 (Figure 3(a)) with characters or the like drawn on it and an auxiliary glass substrate GL1 (Figure 3(b)) integrated together.

[0055] After the glass substrate GL1 in FIG. 3(a) has undergone steps ST10 to ST13 in FIG. 1, it is first subjected to an additional printing step (ST15). That is, key areas depicting anime characters or the like are printed with white ink. As a result, a white ink layer 12 of about 30 μm is formed in the key areas of the glass surface on which the primer layer 3 is provided. In this process, ultraviolet-curable white ink is also used, and after the key areas are inkjet-printed in white, they are irradiated with ultraviolet light, which quickly cures the key areas.

[0056] Next, in the second embodiment, image data of the color-corrected image original consisting of a main area and a background area is supplied to the printer, and the original image is color-printed on the glass surface (excluding the exposed glass area) divided into the white ink layer 12 and the primer layer 10 (ST14). This color printing also uses cyan, magenta, yellow, and black inks, all of which are UV-curable inks.

[0057] Then, if necessary, after the metal foil is thermally transferred, in the second embodiment, a gloss material is printed using an inkjet printer to increase gloss. If gloss is not required, an appropriate protective layer may be provided instead of the gloss layer. In either case, the hardness of the gloss layer and the protective layer is set to about 3H in pencil hardness based on JIS K-5400 8.4.

[0058] The glass substrate GL1 on which characters and the like are drawn has been described above, but the auxiliary substrate GL2 also uses glass G2 of the same composition as glass G1, and the glass G2 is also subjected to the processes of steps ST10 to ST13 in Fig. 1. Then, an appropriate background image is color-printed in an area that covers the main area of ​​the glass substrate GL1, and an appropriate protective layer is laminated and printed as necessary.

[0059] In this second embodiment, to achieve a sparkling effect, granular non-printed areas HO are formed in a scattered pattern in the primer layer 10 and color ink layer 12 of the glass substrate GL1 and in the color ink layer 11 of the auxiliary glass substrate GL2, corresponding to each other. In addition, non-printed areas HO of appropriate areas are also formed in the primer layer 10, white ink layer, and color ink layer 12 of the glass substrate GL1 in necessary locations, such as the centers of the character's eyes. In the configuration of the second embodiment, the white ink layer 12 and the color ink layer 11 are not exposed on the glass substrate GL1 on which characters and the like are drawn, so the polishing process (ST12) and the primer process (ST13) can be omitted. By adopting such a configuration, it is possible to simplify the manufacturing process and reduce manufacturing costs. [Explanation of symbols]

[0060] GL1 glass substrate Rf reflective layer 10 Primer layer 12 White ink layer 11 color ink layer

Claims

1. A decorative mirror is constructed by combining an auxiliary substrate provided with a reflective layer with a glass substrate, and the glass substrate is viewed from the back side thereof. Silicon dioxide (SiO ２ a polishing step of polishing the surface of a glass substrate containing, as constituent materials, 60 to 80 wt % of SiO 2 (silicon dioxide) and 2 to 20 wt % of calcium oxide (CaO) to an arithmetic mean roughness Ra of 0.0007 to 0.0025 μm; a color printing step in which a color ink is printed on the glass substrate after the polishing step, which has undergone a primer step in which a transparent or semi-transparent primer layer is formed on the glass substrate after the polishing step, or on the glass substrate after the polishing step that has not undergone the primer step, and then cured with ultraviolet light to form a color ink layer; This method for manufacturing a decorative mirror includes an additional printing step in which, after the color printing step, white ink is partially printed and cured by ultraviolet light to form a white ink layer in key areas of the design.

2. The manufacturing method according to claim 1 , wherein non-printing areas are formed in a scattered manner in the primer layer and the color ink layer at positions corresponding to each other.

3. The method for manufacturing a decorative mirror according to claim 3 , wherein the non-printed area is not formed in the white ink layer.

4. A decorative mirror is constructed by combining an auxiliary substrate provided with a reflective layer with a glass substrate, and the glass substrate is viewed from the back side thereof. The glass substrate is Silicon dioxide (SiO ２ ) 60 to 80 Wt % and calcium oxide (CaO) 2 to 20 Wt % as constituent materials, and the surface thereof is polished to an arithmetic mean roughness Ra = 0.0007 to 0.0025 μm before use; a color ink layer made of ultraviolet curable ink; a white ink layer made of ultraviolet curable ink printed on a key area of ​​the design, the white ink layer being an ink layer laminated on the color ink layer; The decorative mirror is one in which the color ink layer is formed directly on the glass substrate after polishing, or is formed by laminating it on a transparent or translucent primer layer formed on the glass substrate after polishing.

5. A decorative mirror is constructed by combining an auxiliary substrate provided with a color ink layer with a glass substrate provided with a reflective layer, and the glass substrate is viewed from the front side. The glass substrate is Silicon dioxide (SiO ２ ) 60 to 80 Wt % and calcium oxide (CaO) 2 to 20 Wt % as constituent materials, and its surface is polished to an arithmetic mean roughness Ra = 0.0007 to 0.0025 μm before use; a white ink layer made of ultraviolet curable ink printed on a key area of ​​the design; a color ink layer made of ultraviolet curable ink that is printed on the white ink layer in an essential area of ​​the design, and that is printed without being laminated on the white ink layer in a non-essential area of ​​the design, The decorative mirror is one in which the white ink layer is formed directly on the surface of the glass substrate after polishing, or is laminated on a transparent or translucent primer layer formed on the glass substrate after polishing.

6. 6. The decorative mirror according to claim 5, wherein the color ink layer and the primer layer on the glass substrate have scattered non-printed portions formed at corresponding positions on each layer.

Images