Color mixing and repairing material for cyan sandstone stone cultural relics and application thereof

Abstract

The invention discloses a toning and repairing material for a cyan sandstone stone cultural relic and application of the toning and repairing material, and relates to the technical field of cyan sandstone stone repairing. Aiming at the property and color change of the cyan sandstone, the sintering material ginger nut, quartz sand, clam white powder, Chengban soil, red pottery clay, medium tile ash, black gold sand and green volcanic stone powder are used as natural mineral raw materials, so that the obtained cultural relic color-mixing repairing material is stable in color, and is not easy to discolor after being repaired in an outdoor environment for a long time; and the natural mineral raw material and the repairing and shaping material or the natural raw stone have good binding force, so that the cultural relic toning and repairing material is relatively good in connection stability and not easy to fall off, and the risk that the cultural relics are damaged due to repeated repairing is reduced. Besides, by controlling the proportion of all the raw materials, multiple colors similar to the color of the cyan sandstone can be obtained through rapid modulation, the difficulty of cyan sandstone color modulation and restoration is reduced, a rapid compounding basis is provided for cyan sandstone color modulation, and the color of a restored area is harmonious and unified with the color of surrounding raw stone.

Description

Technical Field

[0001] The invention relates to the technical field of blue sandstone stone restoration, and in particular to a coloring restoration material for blue sandstone stone cultural relics and application thereof. Background Art

[0002] Blue sandstone is a sedimentary rock composed of quartz, feldspar and mica, with high hardness and durability. Blue sandstone cultural relics are mostly found in Anyue area of ​​Sichuan, Danzishi area of ​​Chongqing, Chengde area and Angkor Wat in Cambodia, and are widely distributed. As a type of sandstone, blue sandstone is prone to cracking, weathering and incompleteness when it is placed outdoors for a long time, which not only affects the safety and stability of cultural relics, but also causes immeasurable losses to the various values ​​of the cultural relics themselves.

[0003] At the same time, during the process of rock formation, affected by physical and chemical factors, the same type of stone will have richer color changes in different locations (such as the difference between light yellow and dark yellow in blue sandstone). In addition, after the cultural relics are carved, they are kept outdoors for a long time and are affected by wind, rain, snow and sunlight, and the surface of the cultural relics will also have certain color changes (such as the surface of the stone in the area that has been eroded by rain for a long time will become darker and yellower). Therefore, in the process of repairing blue sandstone cultural relics, different repair areas of the same type of stone need to be allocated with repair materials of similar colors to achieve a coordinated and unified overall restoration effect of the cultural relics.

[0004] The current restoration method includes reshaping, shaping and coloring the area to be restored to ensure the overall restoration effect of the cultural relics is coordinated and unified. The existing coloring process mainly uses chemical synthetic pigments such as Chinese painting pigments and watercolor pigments for coloring. These materials have poor aging resistance under outdoor natural climate conditions. After a period of restoration, they are prone to discoloration or falling off, which is inconsistent with the color of the surrounding original stones, affecting the appreciation and protection of cultural relics. The area to be restored needs to be repaired repeatedly, which not only increases the cost of restoration, but also may cause irreversible damage to the cultural relics during each restoration process, which is not conducive to the protection of cultural relics.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The purpose of the invention is to provide a color-adjusting and restoration material for blue sandstone stone cultural relics and application thereof.

[0007] The present invention is achieved in that:

[0008] In a first aspect, the present invention provides a coloring and restoration material for blue sandstone stone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 10% to 45%, quartz sand: 0% to 37.5%, clam white powder: 0% to 30%, Chengban clay: 0% to 25%, red pottery clay: 0% to 10%, medium tile ash: 0% to 50%, black gold sand: 0% to 37.5% and green volcanic stone powder: 0% to 5%.

[0009] The color value parameters of the burned gravel include: L=74~75, a=4~5, b=14~15.

[0010] The color value parameters of quartz sand include: L=88~90, a=0.1~0.2, b=2.5~3.5.

[0011] The color parameters of clam white powder include: L=88-89, a=3-4, b=1.3-2.3.

[0012] The color value parameters of Chengban clay include: L=50~52, a=9~10, b=21~22.

[0013] The color value parameters of red clay include: L=72~73, a=15~16, b=31~32.

[0014] The color value parameters of medium tile gray include: L=55.3~56.3, a=0.13~1.13, b=4~5.

[0015] The color parameters of black gold sand include: L=32~33, a=3~4, b=-10~-11.

[0016] The color parameters of green volcanic stone powder include: L=77.3~78.3, a=-4~-5, b=12~13.

[0017] In a second aspect, the present invention provides an application of a material as described in any of the aforementioned embodiments in the repair of blue sandstone-type stones.

[0018] Preferably, the material application method includes mixing the raw materials of the material with water in proportion and then applying the mixture to the surface of the green sandstone-like stone.

[0019] Preferably, the mass ratio of the raw material to water is 1:0.35-0.4.

[0020] The present invention has the following beneficial effects:

[0021] The present invention provides a color-adjusting and repairing material for blue sandstone cultural relics and its application. According to the nature and color change of blue sandstone, the color-adjusting and repairing material for blue sandstone cultural relics is obtained by mixing natural mineral raw materials. The cultural relic color-adjusting and repairing material is natural, stable in color, and not easy to change color even in an open-air environment for a long time after repair, and has good color stability; and the natural mineral raw materials have good bonding force with the repairing and patching materials or natural raw stones, so that the connection stability of the cultural relic color-adjusting and repairing material is better, not easy to fall off, and the risk of damage to the cultural relic by repeated repair of the cultural relic is reduced. In addition, by controlling the proportion of each raw material, a variety of colors similar to the color of blue sandstone can be quickly modulated, which reduces the difficulty of color-adjusting and repairing blue sandstone, provides a basis for rapid compounding for color-adjusting of blue sandstone, realizes color-adjusting and repairing of blue sandstone of different colors, and the color of the repaired area is harmonious and unified with the surrounding raw stones. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a color difference diagram of green sandstone in different locations;

[0024] Figure 2 A color comparison diagram of the color-adjusting restoration material for the blue sandstone cultural relic provided in Example 1 of the present invention and the corresponding blue sandstone original stone;

[0025] Figure 3 A color comparison diagram of the color-adjusting restoration material for the blue sandstone cultural relic provided in Example 3 of the present invention and the corresponding blue sandstone original stone;

[0026] Figure 4 A color comparison diagram of the color-adjusting restoration material for the blue sandstone cultural relic provided in Example 4 of the present invention and the corresponding blue sandstone original stone;

[0027] Figure 5 A color comparison diagram of the color-adjusting restoration material for the blue sandstone cultural relic provided in Example 7 of the present invention and the corresponding blue sandstone original stone;

[0028] Figure 6 This is a comparison diagram before and after restoration of the color-adjusting restoration material for the blue sandstone stone cultural relic provided in Example 10 of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0030] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0031] First of all, it should be noted that the color value parameters L, a and b mentioned in the present invention are color representation parameters in the CIELAB color space, which is a device-independent color space and is widely used in color theory and color difference calculation.

[0032] L stands for lightness, which indicates how light or dark a color is. L values ​​usually range from 0 (black) to 100 (white), with lower values ​​representing darker colors and higher values ​​representing lighter colors.

[0033] a represents the range from green to red, with positive values ​​indicating a reddish color and negative values ​​indicating a greenish color.

[0034] b represents the range from blue to yellow, with positive values ​​indicating yellowish color and negative values ​​indicating bluish color.

[0035] By controlling the values ​​of L, a and b of each substance (raw material or coloring and restoration material of blue sandstone cultural relics), the color uniformity of each substance can be ensured; and the L, a and b parameters can be directly detected by equipment, such as using a spectrophotometer, and the detection method is simple and easy to obtain.

[0036] In a first aspect, the present invention provides a coloring and restoration material for blue sandstone stone cultural relics, which includes, by mass percentage, burned gravel: 10% to 45%, quartz sand: 0% to 37.5%, clam white powder: 0% to 30%, Chengban clay: 0% to 25%, red pottery clay: 0% to 10%, medium tile ash: 0% to 50%, black gold sand: 0% to 37.5% and green volcanic stone powder: 0% to 5%.

[0037] By compounding with natural mineral raw materials such as burnt gravel, quartz sand, clam white powder, Chengban soil, red pottery clay, medium tile gray, black gold sand and green volcanic stone powder, the color stability of the cultural relic coloring and restoration material is better, and it is not easy to change color even if it is placed in an open-air environment for a long time after restoration; and the natural mineral raw materials have good bonding with the repair materials or natural raw stones, so that the connection stability of the cultural relic coloring and restoration material is better and it is not easy to fall off, reducing the risk of damage to the cultural relic by repeated restoration of cultural relics. In addition, by controlling the proportion of each raw material, a variety of colors similar to the color of the blue sandstone texture can be quickly adjusted, which reduces the difficulty of coloring and restoration of the blue sandstone texture, provides a basis for rapid compounding for the coloring of the blue sandstone texture, and realizes the coloring and restoration of blue sandstone textures of different colors, and the color of the repaired area is harmonious and unified with the surrounding raw stones.

[0038] Among them, burnt gravel is the main cementing material of the repair material, which plays a bonding role. In addition, the color of burnt gravel is light gray with a white tint, and it can be used as a raw material to reduce the saturation of the color restoration material of cultural relics. The content of burnt gravel can be, for example, any value among 10%, 15%, 20%, 25%, 30%, 35%, 40% or 45%, or a range value between any two values.

[0039] In order to ensure the overall uniformity of the color of the coloring and restoration materials for blue sandstone cultural relics, the color value parameters of the burned gravel include: L=74~75, a=4~5, b=14~15.

[0040] Quartz sand is a filling material for restoration materials, which plays a role in reducing the shrinkage of restoration materials. In addition, the color of quartz sand is close to white, which can adjust the color depth of cultural relics restoration materials. The content of quartz sand can be, for example, any value among 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35% or 37.5%, or a range between any two values.

[0041] In order to ensure the overall color uniformity of the coloring and restoration materials for blue sandstone cultural relics, the color value parameters of quartz sand include: L=88~90, a=0.1~0.2, b=2.5~3.5.

[0042] The function of clam powder is to increase the plasticity of the repair material and adjust the color of the cultural relic coloring repair material. The content of clam powder can be, for example, any value among 0%, 5%, 10%, 15%, 20%, 25% or 30%, or a range value between any two values.

[0043] In order to ensure the overall color uniformity of the coloring and restoration materials for blue sandstone cultural relics, the color value parameters of clam white powder include: L=88~89, a=3~4, b=1.3~2.3.

[0044] The main colors of blue sandstone are gray or yellow. In addition, there are some blue sandstone stones that are reddish, white or bluish. Therefore, in order to meet the color complement needs of blue sandstone stones of different colors, it is necessary to use colorful natural mineral raw materials such as Chengban clay, red pottery clay, Zhongwa gray, black gold sand and green volcanic stone powder for color matching to ensure that the color of the cultural relics coloring and restoration materials is coordinated and unified with the surrounding blue sandstone stones.

[0045] Chengban soil is used as a yellow rock color to adjust the color of cultural relics color restoration materials, and is particularly suitable for coloring yellowish green sandstone raw stones. The amount of Chengban soil added determines the yellowness of the overall color of the cultural relics color restoration materials, so the amount of Chengban soil added can be adjusted according to the color of the green sandstone raw stone. For example, the content of Chengban soil can be any value among 0%, 5%, 10%, 15%, 20% or 25%, or a range value between any two values.

[0046] Specifically, in order to ensure that the chengban soil is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the chengban soil include: L=50~52, a=9~10, b=21~22.

[0047] Red clay is used as a red rock color to adjust the color of cultural relics color restoration materials, and is particularly suitable for coloring yellowish and reddish green sandstone raw stones. According to the color of the green sandstone raw stone, the content of red clay can be adjusted to any value among 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10%, or a range between any two values.

[0048] Specifically, in order to ensure that the red clay is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the red clay include: L=72~73, a=15~16, b=31~32.

[0049] As a gray rock color, the middle tile gray is used to adjust the color of the cultural relic coloring and restoration material, and can reduce the saturation of the cultural relic coloring and restoration material. By changing the content of the middle tile gray, the grayscale of the cultural relic coloring and restoration material can be adjusted. For example, the content of the middle tile gray can be any value of 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50%, or a range value between any two values.

[0050] The higher the grayscale of the surrounding blue sandstone raw stones, the more the content of medium tile gray can be increased; the lower the grayscale of the surrounding blue sandstone raw stones, for example, when it is white or yellowish, the content of medium tile gray can be reduced.

[0051] Specifically, in order to ensure that the middle tile gray is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the middle tile gray include: L=55.3~56.3, a=-0.13~1.13, b=4~5.

[0052] Black gold sand is used as a black rock color to adjust the color of cultural relics coloring and restoration materials. For example, the darkness of the cultural relics coloring and restoration materials can be reduced to match the color of the surrounding blue sandstone raw stones. The content of black gold sand can be any value among 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35% or 37.5%, or a range between any two values.

[0053] Specifically, in order to ensure that the black gold sand is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the black gold sand include: L=32~33, a=3~4, b=-10~-11.

[0054] Green volcanic stone powder is used as green rock color to adjust the color of cultural relics coloring and restoration materials. When the color of the green sandstone original stone is green or blue, the content of green volcanic stone powder can be increased, otherwise the content of green volcanic stone powder can be reduced. The content of green volcanic stone powder can be, for example, any value of 0%, 1%, 2%, 3%, 4% or 5%, or a range between any two values.

[0055] Specifically, in order to ensure that the green volcanic stone powder is controlled within the above range to obtain a color that is coordinated and unified with the surrounding raw stones, the color value parameters of the green volcanic stone powder include: L=77.3~78.3, a=-4~-5, b=12~13.

[0056] like Figure 1 As shown in the figure, due to the inconsistency of the sedimentation process of rocks during diagenesis, the color of blue sandstone in different locations is different, and the cultural relics will also have certain color changes after being exposed to the outdoor environment for a long time (such as rain, snow and sun exposure); at the same time, the color of blue sandstone also includes two main colors: gray and yellow. Therefore, for blue sandstone of different colors, the present invention provides the following formula of cultural relic coloring and restoration materials.

[0057] Since the color adjustment process is relatively complicated, the color change method after adding raw materials of different colors is not uniquely determined, and the original blue sandstone mainly presents gray or yellow, and then presents other colors besides gray according to the deposition method in different locations and the influence of the external environment. For example, the color of the original blue sandstone can be gray of different brightness, such as dark gray and light gray; or different degrees of yellow, such as dark yellow and light yellow, or reddish; the original blue sandstone in some areas is white; and the original blue sandstone in some areas is blue, etc. The following is the formula of the color adjustment and restoration materials for different colors of blue sandstone stone cultural relics and the color value parameters of their corresponding colors.

[0058] In an optional embodiment, when the cultural relics coloring and restoration material appears bluish, the composition of the material, calculated by mass percentage, includes burned gravel: 40% to 45%, quartz sand: 32% to 37.5%, red clay: 2% to 8% and black gold sand: 12% to 18%; when the material appears bluish, the color value parameters of the material include L=55 to 57, a=3 to 4, and b=7 to 8.

[0059] Preferably, when the cultural relic coloring and restoration material appears bluish, the composition of the material, by mass percentage, includes burned gravel: 45%, quartz sand: 35%, red clay: 5% and black gold sand: 15%; when the material appears bluish, the color value parameters of the material include L=55~56, a=3.5~4, b=7.5~8.

[0060] In an optional embodiment, when the cultural relics coloring and restoration material presents a light cyan color, the composition of the material, calculated by mass percentage, includes burned gravel: 40% to 45%, quartz sand: 32% to 37.5%, clam white powder: 2% to 8% and black gold sand: 12% to 18%; when the material presents a light cyan color, the color value parameters of the material include L=59 to 61, a=2 to 3, and b=10 to 11.

[0061] Preferably, when the cultural relics coloring and restoration material presents a light cyan color, the composition of the material, by mass percentage, includes burned gravel: 45%, quartz sand: 35%, clam white powder: 5% and black gold sand: 15%; when the material presents a light cyan color, the color value parameters of the material include L=59.5~60.5, a=2.2~2.8, b=10~10.5.

[0062] In an optional embodiment, when the cultural relics coloring and restoration material appears dark gray, the composition of the material, calculated by mass percentage, includes burned gravel: 22% to 28%, clam white powder: 22% to 28%, medium tile ash: 18% to 22%, black gold sand: 22% to 28% and green volcanic stone powder: 3% to 5%; when the material appears dark gray, the color value parameters of the material include L=54 to 57, a=5 to 6, b=3 to 5.

[0063] Preferably, when the cultural relics coloring and restoration material appears dark gray, the composition of the material, by mass percentage, includes burned gravel: 25%, clam white powder: 25%, medium tile ash: 20%, black gold sand: 25% and green volcanic stone powder: 5%; when the material appears dark gray, the color value parameters of the material include L=55-56, a=5-5.5, b=3.5-4.5.

[0064] In an optional embodiment, when the cultural relics coloring and restoration material presents a warm gray color, the composition of the material, calculated by mass percentage, includes burned gravel: 10% to 15%, quartz sand: 35% to 37.5%, clam white powder: 25% to 30%, red clay: 5% to 10% and black gold sand: 10% to 15%; when the material presents a warm gray color, the color value parameters of the material include L=64 to 66, a=2 to 3, b=5 to 6.

[0065] Preferably, when the cultural relics color restoration material presents a warm gray, the composition of the material, by mass percentage, includes burned gravel: 10%, quartz sand: 37.5%, clam white powder: 30%, red clay: 10% and black gold sand: 12.5%; when the material presents a warm gray, the color value parameters of the material include L=64.5~65.5, a=2.2~2.8, b=5.2~5.8.

[0066] In an optional embodiment, when the cultural relics coloring and restoration material appears light gray, the composition of the material, by mass percentage, includes burned gravel: 35% to 40%, quartz sand: 8% to 12%, clam white powder: 10% to 15%, medium tile ash: 28% to 32%, black gold sand: 2% to 8% and green volcanic stone powder: 3% to 5%; when the material appears light gray, the color value parameters of the material include L=62 to 64, a=1 to 2, b=6 to 7.

[0067] Preferably, when the cultural relics coloring and restoration material appears light gray, the composition of the material, by mass percentage, includes burned gravel: 37.5%, quartz sand: 10%, clam white powder: 12.5%, medium tile ash: 30%, black gold sand: 5% and green volcanic stone powder: 5%; when the material appears light gray, the color value parameters of the material include L=62.5~63.5, a=1~1.6, b=6~6.5.

[0068] In an optional embodiment, when the cultural relics coloring and restoration material appears reddish, the composition of the material, calculated by mass percentage, includes burned gravel: 18% to 22%, quartz sand: 10% to 15%, clam white powder: 18% to 22%, red clay: 8% to 10% and black gold sand: 35% to 37.5%; when the material appears reddish, the color value parameters of the material include L=51 to 53, a=3 to 4, b=6 to 7.

[0069] Preferably, when the cultural relics coloring and restoration material appears reddish, the composition of the material, by mass percentage, includes burned gravel: 20%, quartz sand: 12.5%, clam white powder 20%, red clay: 10% and black gold sand: 37.5%; when the material appears reddish, the color value parameters of the material include L=51.5~52.5, a=3~3.5, b=6~6.5.

[0070] In an optional embodiment, when the cultural relics coloring and restoration material presents a dark yellow color, the composition of the material, calculated by mass percentage, includes burned gravel: 22% to 28%, clarified clay: 22% to 28% and medium tile ash: 45% to 50%; when the material presents a dark yellow color, the color value parameters of the material include L=65 to 67, a=2 to 3.5, and b=9 to 10.

[0071] Preferably, when the cultural relics coloring and restoration material presents a darker yellow color, the composition of the material, calculated by mass percentage, includes burned gravel: 25%, clarified clay: 25% and medium tile ash: 50%; when the material presents a darker yellow color, the color value parameters of the material include L=65.5~66.5, a=2.4~3.2, b=9~9.8.

[0072] In an optional embodiment, when the cultural relics coloring and restoration material appears to be light yellow, the composition of the material, calculated by mass percentage, includes burned gravel: 35% to 40%, quartz sand: 28% to 32%, clay: 10% to 15% and black gold sand: 18% to 22%; when the material appears to be light yellow, the color value parameters of the material include L=57 to 59, a=2 to 3, and b=7 to 8.

[0073] Preferably, when the cultural relics coloring and restoration material appears to be light yellow, the composition of the material, by mass percentage, includes burned gravel: 37.5%, quartz sand: 30%, clay: 12.5% ​​and black gold sand: 20%; when the material appears to be light yellow, the color value parameters of the material include L=57.5~58.5, a=2.4~3, b=7.4~8.

[0074] In an optional embodiment, when the cultural relics coloring and restoration material presents a whitish dark cyan color, the composition of the material, calculated by mass percentage, includes burned gravel: 35% to 40%, quartz sand: 12% to 18%, clam white powder: 10% to 15%, medium tile gray: 12% to 18% and black gold sand: 18% to 22%; when the material presents a whitish dark cyan color, the color value parameters of the material include L=53 to 55, a=2 to 3, b=5 to 6.

[0075] Preferably, when the cultural relics coloring and restoration material presents a whitish dark green color, the composition of the material, calculated by mass percentage, includes burned gravel: 37.5%, quartz sand: 15%, clam white powder: 12.5%, medium tile gray: 15% and black gold sand: 20%; when the material presents a whitish dark green color, the color value parameters of the material include L=53.5~54.5, a=2.1~2.9, b=5.2~5.8.

[0076] In an optional embodiment, when the cultural relics coloring and restoration material appears whitish light green, the composition of the material, calculated by mass percentage, includes burned gravel: 35% to 40%, quartz sand: 18% to 22%, clam white powder: 10% to 15%, medium tile gray: 22% to 28% and black gold sand: 2% to 8%; when the material appears whitish light green, the color value parameters of the material include L=65 to 66, a=1 to 2, b=5 to 6.5.

[0077] Preferably, when the cultural relics coloring and restoration material appears whitish light green, the composition of the material, calculated by mass percentage, includes burned gravel: 37.5%, quartz sand: 20%, clam white powder: 12.5%, medium tile gray: 25% and black gold sand: 5%; when the material appears whitish light green, the color value parameters of the material include L=65~65.5, a=1.2~1.8, b=5.5~6.5.

[0078] In an optional embodiment, the particle size of the quartz sand is 80-120 meshes, and the particle size of the black gold sand is 80-120 meshes. By controlling the particle sizes of the quartz sand and the black gold sand within the above range, the overall fineness of the material and the surrounding blue sandstone raw stones can be coordinated and unified, and the tightness of the connection between the material and the supplementary material and / or the blue sandstone raw stone can be ensured to prevent the material from falling off.

[0079] In a second aspect, the present invention provides an application of a material according to any one of the aforementioned embodiments in the repair of blue sandstone-type stones.

[0080] Preferably, the application method of the cultural relic coloring and restoration material includes mixing the raw materials of the material with water in proportion and then applying the mixture to the surface of the green sandstone-like stone.

[0081] Preferably, the mass ratio of the total mass of the raw materials of the cultural relics coloring and restoration material to water is 1:0.35-0.4.

[0082] The cultural relic coloring and restoration material provided by the present invention has natural raw materials and does not require any chemical additives. It only uses water as a mixing medium for the various raw materials and does not require high-temperature heating for consolidation and molding. It does not cause any physical or chemical damage to the cultural relic itself, and the material has strong compatibility and reversibility.

[0083] In some preferred embodiments, when the material provided by the present invention is used for the restoration of blue sandstone-type stones, it is only necessary to detect the color value parameters of the area to be restored, and then mix them according to the formula corresponding to the color value parameters provided by the present invention, so that a cultural relic coloring restoration material with uniform color can be quickly obtained, which reduces the difficulty of coloring, reduces the number of repeated color tests, and reduces the requirements for the restoration experience or professional knowledge of the restoration personnel, thereby ensuring the accuracy of the color restoration of cultural relics, while avoiding the increase in costs and the possibility of damage to cultural relics caused by repeated repairs.

[0084] Example 1

[0085] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 45% burned gravel, 35% quartz sand, 5% red clay and 15% black gold sand, and can be used to repair blue sandstone raw stones.

[0086] Example 2

[0087] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 45% burned gravel, 35% quartz sand, 5% clam white powder and 15% black gold sand, and can be used to repair light blue blue sandstone raw stones.

[0088] Example 3

[0089] The present embodiment provides a coloring and restoration material for a blue sandstone cultural relic. The coloring and restoration material for the cultural relic comprises, by weight percentage, 37.5% of burnt granite, 10% of quartz sand, and 10% of clam white powder.

[0090] 12.5%, medium tile ash: 30%, black gold sand: 5% and green volcanic stone powder: 5%, can be used to repair the light gray green sandstone raw stone.

[0091] Example 4

[0092] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 10%, quartz sand: 37.5%, clam white powder: 30%, red clay: 10% and black gold sand: 12.5%, and can be used to repair blue sandstone original stones that are warm gray.

[0093] Example 5

[0094] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 25%, clam white powder: 25%, medium tile ash: 20%, black gold sand: 25% and green volcanic stone powder: 5%. The material can be used to repair blue sandstone raw stones that are dark gray.

[0095] Example 6

[0096] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 20% burned gravel, 12.5% ​​quartz sand, 20% clam powder, 10% red clay and 37.5% black gold sand, and can be used to repair reddish blue sandstone raw stones.

[0097] Example 7

[0098] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 25% burned gravel, 25% clear clay and 50% medium tile ash, and can be used to repair blue sandstone original stones that are dark yellow.

[0099] Example 8

[0100] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 37.5% burned gravel, 30% quartz sand, 12.5% ​​clay and 20% black gold sand, and can be used to repair blue sandstone raw stones that are light yellow.

[0101] Example 9

[0102] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 37.5%, quartz sand: 15%, clam white powder: 12.5%, medium tile gray: 15% and black gold sand: 20%. The material can be used to repair blue sandstone raw stones that are whitish dark blue.

[0103] Example 10

[0104] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 37.5%, quartz sand: 20%, clam white powder: 12.5%, medium tile gray: 25% and black gold sand: 5%, which can be used to repair blue sandstone raw stones with a whitish and light blue color.

[0105] Test Example 1

[0106] The color-adjusting and restoration material for the blue sandstone stone cultural relics provided in the above embodiment is applied to the restoration of blue sandstone original stones of corresponding colors, and the color value parameters of the blue sandstone original stones of corresponding colors are detected and recorded in Table 1.

[0107] The color restoration material of the blue sandstone cultural relic in each embodiment was prepared into a cake-shaped sample block with a diameter of 2.5 cm and a thickness of 1 cm, and then the color value parameters of the sample block were detected and recorded in Table 1.

[0108] The sample preparation method is: after mixing the raw materials of the coloring and restoration materials of the blue sandstone stone cultural relics in proportion, add an equal mass of deionized water, stir thoroughly, and then prepare it into a cake-shaped sample, and place the sample in a cool and dry place to stand until it is fully dried.

[0109] The color value parameters were tested by a spectrophotometer, and the color value parameters of the blue sandstone original stone and the sample obtained by the test were compared, and the total color difference △E between the two was calculated according to the color space color difference calculation formula in the National Standard of the People's Republic of China - Uniform Color Space and Color Difference Formula "GB / T 7921-1997".

[0110] According to the color difference tolerance range of CIELAB color space:

[0111] ΔE<1: Imperceptible color difference, that is, it is difficult for the naked eye to distinguish the difference between the two colors.

[0112] 1≤ΔE<2: Slight color difference, which can only be detected by careful observation.

[0113] 2≤ΔE<3.5: General color difference, which can be clearly seen by the naked eye.

[0114] ΔE ≥ 3.5: Significant color difference, very easy to detect, may have a significant impact on the appearance quality of the product.

[0115] Table 1 Color parameters of sample blocks and blue sandstone raw stones

[0116]

[0117]

[0118] As can be seen from Table 1, the samples prepared by the color adjustment and restoration materials for blue sandstone stone cultural relics provided in Examples 1 to 10 of the present invention have a color difference of less than 1 with the blue sandstone original stone, and there is no color difference when observed with the naked eye. The color is very coordinated with the color of the cultural relic itself, has good compatibility, and is suitable for the restoration of cultural relics.

[0119] The samples obtained in Examples 1, 3, 4 and 7 were placed together with the corresponding blue sandstone raw stones and photographed and observed, and the following results were obtained: Figures 2 to 5 The results are shown. Figures 2 to 5 It can be seen that the sample block made by using the cultural relic coloring and restoration material provided by the embodiment of the present invention has almost no difference in color with the original blue sandstone stone, and is suitable for cultural relic restoration.

[0120] Test Example 2

[0121] The color-adjusting restoration material of the blue sandstone cultural relic of Example 10 was applied to the restoration of the blue sandstone stone pagoda of the Qing Dynasty to obtain the following Figure 6 Results shown.

[0122] Depend on Figure 6 It can be seen that after the restoration is carried out using the cultural relic coloring restoration material provided by the embodiment of the present invention, the cracks disappear, and the area near the cracks is coordinated in color with the surrounding blue sandstone original stone, and has good compatibility.

[0123] Comparative Example 1

[0124] This comparative example provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 50% burned gravel, 40% quartz sand, 3% titanium dioxide, 2% terracotta and 5% carbon black. The material can be used to repair reddish blue sandstone raw stones.

[0125] Comparative Example 2

[0126] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, burned gravel: 50%, quartz sand: 40%, ochre: 4%, light gray: 2% and carbon black: 4%. The material can be used to repair blue sandstone raw stones that are dark yellow.

[0127] Comparative Example 3

[0128] The present embodiment provides a coloring and restoration material for blue sandstone cultural relics. The cultural relic coloring and restoration material includes, by mass percentage, 50% burned gravel, 40% quartz sand, 5% ochre, 3% light gray and 2% carbon black. The material can be used to repair blue sandstone raw stones that are light yellow.

[0129] Test Example 3

[0130] The cultural relic coloring and restoration materials provided in Comparative Examples 1 to 3 were prepared into cake-shaped samples of the same size according to the method of Experimental Example 1, and their color value parameters were tested, and the results shown in Table 2 were obtained.

[0131] Then, the samples of Comparative Examples 1 to 3 and Examples 6 to 8 were placed in a natural environment with high temperature, high humidity and abundant rain in summer and low temperature, low humidity and snowfall in winter, and aged for 365 days. The color parameters of the samples after the 365th day were tested and recorded in Table 2. The color parameters tested on the first day (the first day is the day for testing the color after the repair material is naturally dried) and after the 365th day were compared, and the ΔE color difference values ​​of the Examples and Comparative Examples after 365 days of outdoor natural cycle aging were calculated.

[0132] Table 2 Chromaticity parameters of samples of the embodiment and comparative example before and after natural aging

[0133]

[0134]

[0135] It can be seen from Table 2 that the cultural relic coloring and restoration material provided by the embodiment of the present invention has better durability, and has good color stability after long-term placement. Comparative Examples 1 to 3 use chemical synthetic pigments. Although the color difference in the initial stage is small compared with the blue sandstone original stone, after long-term placement, the color changes significantly and the color difference increases. It is not suitable as a coloring restoration material for cultural relic restoration. It is easy to need repeated restoration, which increases the time and labor cost of restoring the cultural relic body and increases the risk of damage to the cultural relic.

[0136] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coloring and restoration material for blue sandstone cultural relics, characterized in that: The materials for coloring and restoration of cultural relics are calculated by mass percentage, including burnt gravel: 10% to 45%, quartz sand: 0% to 37.5%, clam white powder: 0% to 30%, Chengban clay: 0% to 25%, red pottery clay: 0% to 10%, medium tile ash: 0% to 50%, black gold sand: 0% to 37.5% and green volcanic stone powder: 0% to 5%; The color value parameters of the burnt granite include: L=74-75, a=4-5, b=14-15; The color value parameters of the quartz sand include: L=88-90, a=0.1-0.2, b=2.5-3.5; The color parameters of the clam white powder include: L=88-89, a=3-4, b=1.3-2.3; The color value parameters of the Chengban soil include: L=50-52, a=9-10, b=21-22; The color value parameters of the red clay include: L=72-73, a=15-16, b=31-32; The color value parameters of the medium tile gray include: L=55.3-56.3, a=0.13-1.13, b=4-5; The color value parameters of the black gold sand include: L=32-33, a=3-4, b=-10--11; The color value parameters of the green volcanic stone powder include: L=77.3-78.3, a=-4--5, b=12-13.

2. The material according to claim 1, characterized in that When the material is cyan, the composition of the material, by mass percentage, includes burnt granite: 40% to 45%, quartz sand: 32% to 37.5%, red clay: 2% to 8% and black gold sand: 12% to 18%; when the material is cyan, the color value parameters of the material include L=55 to 57, a=3 to 4, and b=7 to 8; Preferably, when the material is cyan, the composition of the material, by mass percentage, includes burnt granite: 45%, quartz sand: 35%, red clay: 5% and black gold sand: 15%; when the material is cyan, the color value parameters of the material include L=55-56, a=3.5-4, b=7.5-8; Preferably, when the material is light blue, the composition of the material, by mass percentage, includes burnt gravel: 40% to 45%, quartz sand: 32% to 37.5%, clam white powder: 2% to 8% and black gold sand: 12% to 18%; when the material is light blue, the color value parameters of the material include L=59 to 61, a=2 to 3, b=10 to 11; Preferably, when the material is dark gray, the composition of the material, by mass percentage, includes burnt gravel: 45%, quartz sand: 35%, clam white powder: 5% and black gold sand: 15%; when the material is dark gray, the color value parameters of the material include L=59.5~60.5, a=2.2~2.8, b=10~10.

5.

3. The material according to claim 1, characterized in that When the material is dark gray, the composition of the material, by mass percentage, includes burnt gravel: 22% to 28%, clam white powder: 22% to 28%, medium tile ash: 18% to 22%, black gold sand: 22% to 28% and green volcanic stone powder: 3% to 5%; when the material is dark gray, the color value parameters of the material include L=54 to 57, a=5 to 6, and b=3 to 5; Preferably, when the material presents a warm gray color, the composition of the material, by mass percentage, includes burnt gravel: 10% to 15%, quartz sand: 35% to 37.5%, clam powder: 25% to 30%, red clay: 5% to 10% and black gold sand: 10% to 15%; when the material presents a warm gray color, the color value parameters of the material include L=64 to 66, a=2 to 3, and b=5 to 6; Preferably, when the material is light gray, the composition of the material, by mass percentage, includes burnt gravel: 35% to 40%, quartz sand: 8% to 12%, clam white powder: 10% to 15%, medium tile ash: 28% to 32%, black gold sand: 2% to 8% and green volcanic stone powder: 3% to 5%; when the material is light gray, the color value parameters of the material include L=62 to 64, a=1 to 2, b=6 to 7.

4. The material according to claim 3, characterized in that When the material is dark gray, the composition of the material, by mass percentage, includes burnt gravel: 25%, clam white powder: 25%, medium tile ash: 20%, black gold sand: 25% and green volcanic stone powder: 5%; when the material is dark gray, the color value parameters of the material include L=55-56, a=5-5.5, b=3.5-4.5; Preferably, when the material presents a warm gray color, the composition of the material, by mass percentage, includes burnt gravel: 10%, quartz sand: 37.5%, clam white powder: 30%, red clay: 10% and black gold sand: 12.5%; when the material presents a warm gray color, the color value parameters of the material include L=64.5-65.5, a=2.2-2.8, b=5.2-5.8; Preferably, when the material is light gray, the composition of the material, by mass percentage, includes burnt gravel: 37.5%, quartz sand: 10%, clam white powder: 12.5%, medium tile ash: 30%, black gold sand: 5% and green volcanic stone powder: 5%; when the material is light gray, the color value parameters of the material include L=62.5~63.5, a=1~1.6, b=6~6.

5.

5. The material according to claim 1, characterized in that When the material is reddish, the composition of the material, by mass percentage, includes burnt gravel: 18% to 22%, quartz sand: 10% to 15%, clam powder: 18% to 22%, red clay: 8% to 10% and black gold sand: 35% to 37.5%; when the material is reddish, the color value parameters of the material include L=51 to 53, a=3 to 4, and b=6 to 7; Preferably, when the material is dark yellow, the composition of the material, by mass percentage, includes burnt gravel: 22% to 28%, Chengban clay: 22% to 28% and medium tile ash: 45% to 50%; when the material is dark yellow, the color value parameters of the material include L=65 to 67, a=2 to 3.5, and b=9 to 10; Preferably, when the material is light yellow, the composition of the material, calculated by mass percentage, includes burnt gravel: 35% to 40%, quartz sand: 28% to 32%, terrane: 10% to 15% and black gold sand: 18% to 22%; when the material is light yellow, the color value parameters of the material include L=57 to 59, a=2 to 3, and b=7 to 8.

6. The material according to claim 5, characterized in that When the material is reddish, the composition of the material, by mass percentage, includes burnt gravel: 20%, quartz sand: 12.5%, clam white powder: 20%, red clay: 10% and black gold sand: 37.5%; when the material is reddish, the color value parameters of the material include L=51.5-52.5, a=3-3.5, b=6-6.5; Preferably, when the material is dark yellow, the composition of the material, by mass percentage, includes burnt gravel: 25%, Chengban clay: 25% and medium tile ash: 50%; when the material is dark yellow, the color value parameters of the material include L=65.5-66.5, a=2.4-3.2, b=9-9.8; Preferably, when the material is light yellow, the composition of the material, by mass percentage, includes burnt gravel: 37.5%, quartz sand: 30%, terra cotta: 12.5% ​​and black gold sand: 20%; when the material is light yellow, the color value parameters of the material include L=57.5~58.5, a=2.4~3, b=7.4~8.

7. The material according to claim 1, characterized in that When the material is whitish dark green, the composition of the material, by mass percentage, includes burnt gravel: 35% to 40%, quartz sand: 12% to 18%, clam white powder: 10% to 15%, medium tile gray: 12% to 18% and black gold sand: 18% to 22%; when the material is whitish dark green, the color value parameters of the material include L=53 to 55, a=2 to 3, and b=5 to 6; Preferably, when the material is whitish-green in color, the composition of the material, calculated by mass percentage, includes burnt gravel: 35%-40%, quartz sand: 18%-22%, clam white powder: 10%-15%, medium tile gray: 22%-28% and black gold sand: 2%-8%; when the material is whitish-green in color, the color value parameters of the material include L=65-66, a=1-2, b=5-6.

5.

8. The material according to claim 7, characterized in that When the material is whitish dark green, the composition of the material, by mass percentage, includes burnt gravel: 37.5%, quartz sand: 15%, clam white powder: 12.5%, medium tile gray: 15% and black gold sand: 20%; when the material is whitish dark green, the color value parameters of the material include L=53.5-54.5, a=2.1-2.9, b=5.2-5.8; Preferably, when the material is whitish green, the composition of the material, calculated by mass percentage, includes burnt gravel: 37.5%, quartz sand: 20%, clam white powder: 12.5%, medium tile gray: 25% and black gold sand: 5%; when the material is whitish green, the color value parameters of the material include L=65~65.5, a=1.2~1.8, b=5.5~6.

5.

9. The material according to any one of claims 2 to 8, characterized in that The particle size of the quartz sand is 80-120 meshes, and the particle size of the black gold sand is 80-120 meshes.

10. Use of the material according to any one of claims 1 to 9 in the repair of green sandstone; Preferably, the application method of the material comprises mixing the raw materials of the material with water in proportion and then applying the mixture to the surface of the green sandstone-like stone; Preferably, the mass ratio of the raw material of the material to water is 1:0.35-0.4.

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