Preparation method of superfine texture relief mirror polished rock plate

Abstract

This invention relates to the field of mirror-finish polished slab technology, and discloses a method for preparing an ultra-fine textured embossed mirror-finish polished slab, comprising the following steps: forming a blank from raw material powder; applying a glaze to the surface of the blank, and drying it to form a dense glaze surface; inkjet printing a first design file onto the glaze surface using colored ink to form a colored ink layer; inkjet printing a second design file onto the printed colored ink location using digital mold ink to form a digital mold ink layer; applying a dry granule glaze, wherein the dry granule glaze has a mesh size of 200-240 mesh, and then drying, firing, and polishing. Through the preparation method of this invention, the surface of the mirror-finish polished slab can have a fine texture exhibiting an embossed effect, which is beneficial for simulating the texture of precious naturally formed materials, enhancing the decorative effect of ceramic slab products, and expanding the potential possibilities of product pattern design.

Description

Technical Field

[0001] This invention relates to the field of mirror-finish polished rock slab technology, and in particular to a method for preparing an ultra-fine textured embossed mirror-finish polished rock slab. Background Technology

[0002] Ceramic slabs are plate-shaped ceramic materials produced from natural raw materials such as natural stone powder and feldspar through processes such as pressing, molding, and high-temperature firing. They possess advantages such as safety and hygiene, fire resistance, high-temperature resistance, stain resistance, and corrosion resistance, making them widely used in home decoration. In recent years, consumer demand for the decorative effects of ceramic slabs has become increasingly diversified, with slabs featuring delicate textures gaining popularity in the market. The delicate texture, presenting an embossed effect (raised above the slab surface), can make patterns appear more natural and realistic. However, currently, there is no existing technology that can create such a raised, delicate texture on mirror-polished slabs—tiles with delicate embossed textures are all matte tiles produced using digital molds, not mirror-polished ones. Mirror-polished slabs include dry-granulated polished slabs, which essentially lack any embossed texture.

[0003] The applicant's previously filed patent CN115353288A discloses a production apparatus and method for a dual-digital decorative embossed three-dimensional effect slab, comprising: preparing blank powder, pressing and drying the blank; spraying digital mold ink, inkjet printing a first design file; spraying digital mold glaze to form a pattern texture; drying in a first drying kiln; printing a second design file; printing a gradient pattern matching the texture of the second design file using a second digital inkjet printer; applying dry granules; recovering dry granules not bonded by digital adhesive to form a design texture; drying in a second drying kiln; selectively spraying adhesive fixative or protective glaze; drying in a long drying kiln; firing a semi-finished product in one firing; and brushing, polishing, edge grinding, and film application to obtain the finished product. Using the method of this patent, combining digital mold ink with dry granule polishing, a delicate embossed three-dimensional effect pattern can be formed on the surface of a mirror-polished slab. However, this is only a visual embossing effect; the resulting slab surface is smooth and cannot form a texture raised above the slab surface (such as...). Figure 2 (As shown). Summary of the Invention

[0004] To address the technical challenge of creating delicate embossed textures on the surface of mirror-polished slabs using existing technologies, this invention provides a method for preparing ultra-fine textured embossed mirror-polished slabs. This method enables the surface of mirror-polished slabs to possess delicate textures exhibiting an embossed effect, facilitating the simulation of textures found in precious, naturally formed materials. This enhances the decorative effect of ceramic slab products and expands the potential possibilities for product pattern design.

[0005] The specific technical solution of this invention is as follows:

[0006] A method for preparing an ultra-fine textured embossed mirror-finish polished rock slab includes the following steps:

[0007] (1) The green body powder is made into a green body;

[0008] (2) Apply glaze to the surface of the body and dry it to form a dense glaze surface;

[0009] (3) The first design file is printed on the glaze surface using colored ink jet printing to form a colored ink layer;

[0010] (4) A second design document is printed using digital mold inkjet printing on the position where colored ink has been printed, forming a digital mold ink layer.

[0011] (5) Apply dry granule glaze to the ink layer of the digital mold, wherein the dry granules in the dry granule glaze have a mesh size of 200-240 mesh, and then dry, fire and polish.

[0012] This invention discovers that when the dry granule mesh size is 80-200 mesh, and it is combined with color ink and digital mold ink, a delicate relief texture can be formed on the surface of the mirror-polished slab obtained by dry granule polishing. Specifically, digital mold ink combined with inkjet printing can form natural and delicate patterns and textures. At the same time, since this invention sprays the digital mold ink on top of the color ink layer, when the dry granule glaze is applied to the inkjet-printed blank, the dry granule glaze can come into contact with the digital mold ink. This ink has high oil content and can make the glue in the dry granule glaze lose its adhesive effect, thereby separating the water-based dry granules. The color ink has low oil content and cannot separate the dry granules. Therefore, on the top of the pattern formed by the color ink, the dry granules are rarely distributed inside the pattern formed by the digital mold ink, but are more distributed at its edges. Thus, a raised texture can be formed along the delicate pattern formed by the digital mold ink. This raised structure can be retained after polishing, so that the surface of the slab has a delicate texture with a relief effect.

[0013] In the above process, some particles with too small a mesh size (i.e., too large a particle size) cannot be separated by the digital mold ink, thus making it difficult to form an embossed texture. This invention uses dry particles with a mesh size of 200-240, which can be separated well by the action of digital mold ink, helping to form a delicate embossed texture with clear transitions.

[0014] Preferably, in step (5), the specific gravity of the dry granular glaze is 1.45-1.55 g / mL, the flow rate is 30-35 s, the viscosity is 55-80 mPa·s, and the glaze application amount is 750-900 g / mL. 2 .

[0015] Dry granule glaze consists of dry granules and adhesive. When the adhesive content is too high (i.e., the viscosity of the dry granule glaze is too high), the dry granules tend to adhere firmly to the glaze surface and are not easily dispersed by digital mold ink, making it difficult to form delicate relief textures. Therefore, this invention, while ensuring that the dry granule glaze flow rate can reach 30-35s (so that the dry granule glaze can be evenly distributed on the glaze surface), appropriately reduces the viscosity of the dry granule glaze, which can improve the formation effect of delicate relief textures.

[0016] Preferably, in step (5), the initial melting temperature of the dry granules in the dry granule glaze is 1120-1170℃, and the firing temperature is 1175-1210℃.

[0017] Using dry granules with a higher initial melting temperature results in slower melting during firing, allowing them to be quickly fixed to the glaze surface before excessive flow occurs, thus preventing the relief texture from being destroyed during firing. Dry granules with an excessively low initial melting temperature are prone to flowing during firing, which can destroy the texture raised on the surface, cause multiple textures to easily fuse together, and even make it impossible to maintain the relief effect.

[0018] Preferably, in step (5), the dry granule glaze comprises the following components in parts by weight: 50-55 parts dry granules, 15-25 parts glue, and 25-35 parts water.

[0019] Preferably, the dispersion medium in the digital mold ink has a higher oil content than the dispersion medium in the color ink; when the dry granule glaze is applied to the color ink and the digital mold ink respectively, when the ink grayscale is 50-100, the distance that the 200-240 mesh dry granules are separated within 2 seconds is not greater than 0.3 mm and not less than 1 mm respectively.

[0020] Digital mold inks use a highly oily dispersion medium, which repels water-based dry particles. Furthermore, the oily dispersion medium neutralizes the adhesive in the dry glaze particles, thus separating the dry particles in contact with the digital mold ink. Color inks, on the other hand, use a less oily dispersion medium, resulting in a weaker effect on separating the dry particles. This method ensures that the dry particles are distributed at the interface between the digital mold ink and the color ink, which is beneficial for creating clear lines, especially sharp embossed textures at transitions.

[0021] Preferably, in step (4), when printing the second design document by inkjet, the temperature of the glaze surface is controlled to not exceed 55°C.

[0022] If the surface temperature of the glaze is too high, the ink in the digital mold will easily evaporate, which is not conducive to inkjet printing.

[0023] Preferably, in step (2), the specific gravity of the glaze is 1.80-1.90 g / mL, the flow rate is 32-38 s, and the glaze application amount is 400-550 g / mL. 2 .

[0024] By controlling the specific gravity, flow rate, and amount of glaze within the above range, it is beneficial to form a dense and smooth glaze surface, making it difficult for digital mold ink to penetrate into the body, avoiding its blurring and affecting its effect of separating dry particles, and making the final relief texture have better clarity.

[0025] Preferably, the inkjet volume of the colored ink is 15-25 g / m³. 2 In step (4), the inkjet volume of the digital mold ink is 40-50 g / m³. 2 .

[0026] Preferably, in step (2), the drying temperature is 130-160℃ and the time is 55-70 min; in step (5), the drying temperature is 130-160℃ and the time is 10-15 min, and the firing time is 90-120 min.

[0027] Preferably, in steps (3) and (4), the same multi-channel inkjet printer is used for inkjet printing of color ink and digital mold ink.

[0028] Using the same inkjet printer for both inks makes it easier to align and match the printing positions of the two inks, reducing offset and improving the fineness of the pattern.

[0029] Preferably, in step (5), after polishing, edge grinding and film application are performed.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] (1) In this invention, dry granules with a specific mesh size range are used in conjunction with color ink and digital mold ink to form a delicate relief texture on the surface of the mirror-polished slab obtained by dry granule polishing, which enhances the decorative effect of ceramic slab products and expands the potential possibilities of product pattern design.

[0032] (2) In this invention, by controlling the viscosity of the dry granule glaze and the mesh number of the dry granules, the temperature of the glaze surface when printing digital mold ink, the specific gravity, flow rate and amount of the glaze, the formation effect of the fine relief texture can be improved, and the lines of the relief texture formed are clear, especially the turning points. Attached Figure Description

[0033] Figure 1 This is a photograph of the product surface after firing (unpolished) in Example 1.

[0034] Figure 2 An example of a rock slab produced according to the method in patent CN115353288A.

[0035] Figure 3 This is a photograph of the product surface before firing in Example 1.

[0036] Figure 4 This is a photograph of the rock slab texture obtained in Example 2.

[0037] Figure 5 This is a photograph of the rock slab texture obtained in Example 3.

[0038] Figure 6 This is a photograph of the product surface before firing in Comparative Example 1.

[0039] Figure 7 This is a photograph of the surface of the product after firing (unpolished) in Comparative Example 1.

[0040] Figure 8 This is a photograph of the product surface before firing in Comparative Example 2.

[0041] Figure 9 This is a photograph of the surface of the product after firing (unpolished) in Comparative Example 2.

[0042] Figure 10 This is a photograph of the surface of the product after firing (unpolished) in Comparative Example 3.

[0043] Figure 11 This is a photograph of the product surface before firing in Comparative Example 4.

[0044] Figure 12 This is a photograph of the surface of the product after firing (unpolished) in Comparative Example 4. Detailed Implementation

[0045] The present invention will be further described below with reference to embodiments.

[0046] General Implementation Examples

[0047] A method for preparing an ultra-fine textured embossed mirror-finish polished rock slab includes the following steps:

[0048] (1) The green body powder is made into a green body;

[0049] (2) Apply glaze to the surface of the body and dry it to form a dense glaze surface;

[0050] (3) The first design file is printed on the glaze surface using colored ink jet printing to form a colored ink layer;

[0051] (4) A second design document is printed using digital mold inkjet printing on the position where colored ink has been printed, forming a digital mold ink layer.

[0052] (5) Apply dry granule glaze to the ink layer of the digital mold, wherein the dry granules in the dry granule glaze have a mesh size of 200-240 mesh, and then dry, fire and polish.

[0053] In one specific embodiment, in step (5), the specific gravity of the dry granular glaze is 1.45-1.55 g / mL, the flow rate is 30-35 s, the viscosity is 55-80 mPa·s, and the glaze application amount is 750-900 g / mL. 2 .

[0054] In one specific implementation, in step (5), the initial melting temperature of the dry granules in the dry granule glaze is 1120-1170℃, and the firing temperature is 1175-1210℃.

[0055] In one specific embodiment, in step (5), the dry granule glaze comprises the following components by weight: 50-55 parts dry granules, 15-25 parts glue, and 25-35 parts water.

[0056] In one specific implementation, in step (4), the dispersion medium in the digital mold ink is more oily than the dispersion medium in the color ink; when the dry granule glaze is applied to the color ink and the digital mold ink respectively, when the ink gray level is 50-100, the distance between the 200-240 mesh dry granules within 2s is not greater than 0.3mm and not less than 1mm respectively.

[0057] As one specific implementation, in step (4), when printing the second design document by inkjet, the temperature of the glaze surface is controlled to not exceed 55°C.

[0058] In one specific implementation, in step (2), the specific gravity of the glaze is 1.80-1.90 g / mL, the flow rate is 32-38 s, and the glaze application amount is 400-550 g / mL. 2 .

[0059] In one specific implementation, in step (3), the inkjet volume of the colored ink is 15-25 g / m³. 2 In step (4), the inkjet volume of the digital mold ink is 40-50 g / m³. 2 .

[0060] In one specific implementation, in step (2), the drying temperature is 130-160℃ and the time is 55-70min; in step (5), the drying temperature is 130-160℃ and the time is 10-15min, and the firing time is 90-120min.

[0061] In one specific implementation, in steps (3) and (4), the same multi-channel inkjet printer is used to print color ink and digital mold ink.

[0062] In one specific implementation, in step (5), after polishing, edge grinding and film application are performed.

[0063] Example 1

[0064] A high-quality textured embossed mirror-finish polished rock slab is prepared through the following steps:

[0065] (1) After pressing the green body powder into shape by press, dry it at 130℃ for 55 minutes to obtain the green body.

[0066] (2) Apply glaze to the surface of the blank using a glazing tray, with a glaze application rate of 500g / m². 2 This forms a relatively dense glaze, with the surface glaze having a specific gravity of 1.85 g / mL and a flow rate of 35 s.

[0067] (3) Dry the glaze in a small drying kiln at 110℃ for 5 minutes to dry the glaze.

[0068] (4) After cooling to a surface temperature not exceeding 55℃, the first design document is printed on the glaze surface using a multi-channel inkjet printer equipped with color ink (dispersion medium is n-propyl acetate; when dry glaze particles are applied to color ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not greater than 0.3mm) and digital mold ink (dispersion medium is isooctyl palmitate; when dry glaze particles are applied to digital mold ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not less than 1mm). The inkjet volume is 25g / m³. 2 This forms a colored ink layer; then, on the areas where the colored ink has been printed, a second design file is inkjet printed using digital mold inks of different gray levels, with an inkjet volume of 45g / m². 2 This forms the ink layer of the digital mold.

[0069] (5) Apply dry granule glaze to the digital mold ink layer through a bell-shaped glaze plate, ensuring it covers the entire glaze surface. The glaze application amount is 800g / m². 2 The dry granule glaze used has a specific gravity of 1.50 g / mL, a flow rate of 35 s, a viscosity of 70 mPa·s, a particle size of 200-240 mesh, and an initial melting temperature of 1135℃. The dry granule glaze used in this embodiment consists of the following components by weight: 50 parts dry granules, 20 parts 8004c glue (mainly composed of hydroxyethyl cellulose), and 30 parts water.

[0070] (6) The semi-finished product was obtained by drying in a long drying kiln at 160°C for 15 minutes. A photograph of its surface is shown below. Figure 3 .from Figure 3 It can be seen that there is a wet-dry variation in the effect ink area, with a clear distinction between wet and dry. The dry particles are obviously separated by the digital mold ink, resulting in a delicate texture.

[0071] (7) The semi-finished product was fired once at 1200℃ for 90 minutes. See the product photo below. Figure 1 .from Figure 1 It can be seen that the surface of the fired product has obvious relief texture, strong concave and convex feel, and the relief texture is natural and delicate with clear transitions.

[0072] (8) The fired product is polished, edged and coated to obtain the finished product.

[0073] Example 2

[0074] A high-quality textured embossed mirror-finish polished rock slab is prepared through the following steps:

[0075] (1) After pressing the green body powder into shape by press, dry it at 130℃ for 55 minutes to obtain the green body.

[0076] (2) Apply glaze to the surface of the blank using a glazing tray, with a glaze application rate of 400 g / m². 2 This forms a relatively dense glaze, with the surface glaze having a specific gravity of 1.90 g / mL and a flow rate of 38 s.

[0077] (3) Dry the glaze in a small drying kiln at 110℃ for 5 minutes to dry the glaze.

[0078] (4) After cooling to a surface temperature not exceeding 55℃, the first design document is printed on the glaze surface using a multi-channel inkjet printer equipped with color ink (dispersion medium is n-propyl acetate; when dry glaze particles are applied to color ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not greater than 0.3mm) and digital mold ink (dispersion medium is isooctyl palmitate; when dry glaze particles are applied to digital mold ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not less than 1mm). The inkjet volume is 25g / m³. 2 This forms a colored ink layer; then, on the areas where the colored ink has been printed, a second design file is inkjet printed using digital mold inks of different gray levels, with an inkjet volume of 45g / m². 2 This forms the ink layer of the digital mold.

[0079] (5) Apply dry granule glaze to the digital mold ink layer through a bell-shaped glaze plate, ensuring it covers the entire glaze surface. The glaze application amount is 800g / m². 2 The dry granule glaze used has a specific gravity of 1.47 g / mL, a flow rate of 30 s, a viscosity of 57 mPa·s, a particle size of 200-230 mesh, and an initial melting temperature of 1120℃. The dry granule glaze used in this embodiment consists of the following components by weight: 50 parts dry granules, 15 parts 8004c glue (mainly composed of hydroxyethyl cellulose), and 35 parts water.

[0080] (6) Dry the product at 160°C for 15 minutes in a long drying kiln to obtain a semi-finished product.

[0081] (7) The semi-finished product is fired once at 1175℃ for 90 minutes.

[0082] (8) The fired product is polished, edged and coated to obtain the finished product.

[0083] The surface texture photograph of the rock slab obtained in this embodiment can be found in [the image]. Figure 4 .from Figure 4 As can be seen, the method of this embodiment can make the surface of the mirror-polished rock slab present an embossed texture with obvious concave and convex feel, and the embossed texture is natural and delicate.

[0084] Example 3

[0085] A high-quality textured embossed mirror-finish polished rock slab is prepared through the following steps:

[0086] (1) After pressing the green body powder into shape by press, dry it at 130℃ for 55 minutes to obtain the green body.

[0087] (2) Apply glaze to the surface of the blank using a glazing tray, with a glaze application rate of 550 g / m². 2 This forms a relatively dense glaze, with the surface glaze having a specific gravity of 1.81 g / mL and a flow rate of 32 s.

[0088] (3) Dry the glaze in a small drying kiln at 110℃ for 5 minutes to dry the glaze.

[0089] (4) After cooling to a surface temperature not exceeding 55℃, the first design document is printed on the glaze surface using a multi-channel inkjet printer equipped with color ink (dispersion medium is n-propyl acetate; when dry glaze particles are applied to color ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not greater than 0.3mm) and digital mold ink (dispersion medium is isooctyl palmitate; when dry glaze particles are applied to digital mold ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not less than 1mm). The inkjet volume is 25g / m³. 2 A colored ink layer is formed; then, a second design file is printed using digital mold inks of different gray levels on the areas where the colored ink has been printed, forming a digital mold ink layer.

[0090] (5) Apply dry granule glaze to the digital mold ink layer through a bell-shaped glaze plate, ensuring it covers the entire glaze surface. The glaze application amount is 800g / m². 2The dry granule glaze used has a specific gravity of 1.54 g / mL, a flow rate of 35 s, a viscosity of 80 mPa·s, a particle size of 200-230 mesh, and an initial melting temperature of 1170℃. The dry granule glaze used in this embodiment consists of the following components by weight: 55 parts dry granules, 25 parts 8004c glue (mainly composed of hydroxyethyl cellulose), and 25 parts water.

[0091] (6) Dry the product at 160°C for 15 minutes in a long drying kiln to obtain a semi-finished product.

[0092] (7) The semi-finished product is fired once at 1210℃ for 90 minutes.

[0093] (8) The fired product is polished, edged and coated to obtain the finished product.

[0094] The surface texture photograph of the rock slab obtained in this embodiment can be found in [the image]. Figure 5 .from Figure 5 As can be seen, the method of this embodiment can make the surface of the mirror-polished rock slab present an embossed texture with obvious concave and convex feel, and the embossed texture is natural and delicate.

[0095] Comparative Example 1

[0096] The only difference between this comparative example and Example 1 is that this comparative example uses dry particles with a smaller mesh size (i.e., larger particle size); all other aspects are the same as in Example 1. The specific steps for preparing the mirror-finished blasted rock slab in this comparative example are as follows:

[0097] (1) After pressing the green body powder into shape by press, dry it at 130℃ for 55 minutes to obtain the green body.

[0098] (2) Apply glaze to the surface of the blank using a glazing tray, with a glaze application rate of 500g / m². 2 This forms a relatively dense glaze, with the surface glaze having a specific gravity of 1.85 g / mL and a flow rate of 35 s.

[0099] (3) Dry the glaze in a small drying kiln at 110℃ for 5 minutes to dry the glaze.

[0100] (4) After cooling to a surface temperature not exceeding 55℃, the first design document is printed on the glaze surface using a multi-channel inkjet printer equipped with color ink (dispersion medium is n-propyl acetate; when dry glaze particles are applied to color ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not greater than 0.3mm) and digital mold ink (dispersion medium is isooctyl palmitate; when dry glaze particles are applied to digital mold ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not less than 1mm). The inkjet volume is 25g / m³. 2This forms a colored ink layer; then, on the areas where the colored ink has been printed, a second design file is inkjet printed using digital mold inks of different gray levels, with an inkjet volume of 45g / m². 2 This forms the ink layer of the digital mold.

[0101] (5) Apply dry granule glaze to the digital mold ink layer through a bell-shaped glaze plate, ensuring it covers the entire glaze surface. The glaze application amount is 800g / m². 2 The dry granule glaze used has a specific gravity of 1.50 g / mL, a flow rate of 35 s, a viscosity of 70 mPa·s, a particle size of 100-120 mesh, and an initial melting temperature of 1135℃. The dry granule glaze used in this embodiment consists of the following components by weight: 50 parts dry granules, 20 parts 8004c glue (mainly composed of hydroxyethyl cellulose), and 30 parts water.

[0102] (6) The semi-finished product was obtained by drying in a long drying kiln at 160°C for 15 minutes. A photograph of its surface is shown below. Figure 6 .from Figure 6 It can be seen that there is a wet-dry change in the effect ink area, and the digital mold ink has a slight effect on separating dry particles, but it is not obvious.

[0103] (7) The semi-finished product was fired once at 1200℃ for 90 minutes. See the product photo below. Figure 7 .from Figure 7 It can be seen that the surface of the fired product exhibits textures of different colors, but there are very few relief textures and the unevenness is not obvious.

[0104] (8) The fired product is polished, edged and coated to obtain the finished product.

[0105] Compare the experimental results of Example 1 and Comparative Example 1 (i.e.) Figure 1 , Figure 3 , Figure 6 and Figure 7 This indicates that when using dry particles with a mesh size of 200-240, the interaction between the dry particles and the digital mold ink can create an embossed texture. However, when the mesh size of the dry particles is too small, they cannot be separated by the digital mold ink, making it difficult to create an embossed texture.

[0106] Comparative Example 2

[0107] The only difference between this comparative example and Example 1 is that a higher viscosity dry granule glaze was used in this comparative example; all other aspects are the same as in Example 1. The specific steps for preparing the mirror-finish polished rock slab in this comparative example are as follows:

[0108] (1) After pressing the green body powder into shape by press, dry it at 130℃ for 55 minutes to obtain the green body.

[0109] (2) Apply glaze to the surface of the blank using a glazing tray, with a glaze application rate of 500g / m². 2 This forms a relatively dense glaze, with the surface glaze having a specific gravity of 1.85 g / mL and a flow rate of 35 s.

[0110] (3) Dry the glaze in a small drying kiln at 110℃ for 5 minutes to dry the glaze.

[0111] (4) After cooling to a surface temperature not exceeding 55℃, the first design document is printed on the glaze surface using a multi-channel inkjet printer equipped with color ink (dispersion medium is n-propyl acetate; when dry glaze particles are applied to color ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not greater than 0.3mm) and digital mold ink (dispersion medium is isooctyl palmitate; when dry glaze particles are applied to digital mold ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not less than 1mm). The inkjet volume is 25g / m³. 2 This forms a colored ink layer; then, on the areas where the colored ink has been printed, a second design file is inkjet printed using digital mold inks of different gray levels, with an inkjet volume of 45g / m². 2 This forms the ink layer of the digital mold.

[0112] (5) Apply dry granule glaze to the digital mold ink layer through a bell-shaped glaze plate, ensuring it covers the entire glaze surface. The glaze application amount is 800g / m². 2 The dry granule glaze used has a specific gravity of 1.58 g / mL, a flow rate of 27 s, a viscosity of 96 mPa·s, a particle size of 200-240 mesh, and an initial melting temperature of 1135℃. The dry granule glaze used in this embodiment consists of the following components by weight: 50 parts dry granules, 40 parts 8004c glue (mainly composed of hydroxyethyl cellulose), and 10 parts water.

[0113] (6) The semi-finished product was obtained by drying in a long drying kiln at 160°C for 15 minutes. A photograph of its surface is shown below. Figure 3 .from Figure 8 It can be seen that there is a wet-dry change in the effect ink area, with the effect ink area being particularly wet, while the digital mold ink has some separation of the dry particles, which is quite obvious.

[0114] (7) The semi-finished product was fired once at 1200℃ for 90 minutes. See the product photo below. Figure 1 .from Figure 9 It can be seen that the surface of the fired product has an embossed texture, but the texture is relatively weak and the embossed texture is not delicate enough.

[0115] (8) The fired product is polished, edged and coated to obtain the finished product.

[0116] Compare the experimental results of Example 1 and Comparative Example 2 (i.e.) Figure 1 , Figure 3 , Figure 8 and Figure 9 This indicates that when the viscosity of the dry granule glaze is too high, the dry granules tend to adhere firmly to the glaze surface and are not easily separated by the digital mold ink, thus resulting in an insufficiently delicate relief texture.

[0117] Comparative Example 3

[0118] The only difference between this comparative example and Example 1 is that this comparative example uses dry particles with a high melt flow rate; all other aspects are the same as in Example 1. The specific steps for preparing the mirror-finished blasted rock slab in this comparative example are as follows:

[0119] (1) After pressing the green body powder into shape by press, dry it at 130℃ for 55 minutes to obtain the green body.

[0120] (2) Apply glaze to the surface of the blank using a glazing tray, with a glaze application rate of 500g / m². 2 This forms a relatively dense glaze, with the surface glaze having a specific gravity of 1.85 g / mL and a flow rate of 35 s.

[0121] (3) Dry the glaze in a small drying kiln at 110℃ for 5 minutes to dry the glaze.

[0122] (4) After cooling to a surface temperature not exceeding 55℃, the first design document is printed on the glaze surface using a multi-channel inkjet printer equipped with color ink (dispersion medium is n-propyl acetate; when dry glaze particles are applied to color ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not greater than 0.3mm) and digital mold ink (dispersion medium is isooctyl palmitate; when dry glaze particles are applied to digital mold ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not less than 1mm). The inkjet volume is 25g / m³. 2 This forms a colored ink layer; then, on the areas where the colored ink has been printed, a second design file is inkjet printed using digital mold inks of different gray levels, with an inkjet volume of 45g / m². 2 This forms the ink layer of the digital mold.

[0123] (5) Apply dry granule glaze to the digital mold ink layer through a bell-shaped glaze plate, ensuring it covers the entire glaze surface. The glaze application amount is 800g / m². 2The dry granule glaze used has a specific gravity of 1.50 g / mL, a flow rate of 35 s, a viscosity of 70 mPa·s, a particle size of 200-240 mesh, and an initial melting temperature of 1135℃. The dry granule glaze used in this embodiment consists of the following components by weight: 50 parts dry granules, 20 parts 8004c glue (mainly composed of hydroxyethyl cellulose), and 30 parts water.

[0124] (6) Dry the product at 160°C for 15 minutes in a long drying kiln to obtain a semi-finished product.

[0125] (7) The semi-finished product was fired once at 1200℃ for 90 minutes. See the product photo below. Figure 10 .from Figure 10 It can be seen that the surface of the fired product exhibits textures of different colors, but there is almost no embossed texture.

[0126] (8) The fired product is polished, edged and coated to obtain the finished product.

[0127] Compare the experimental results of Example 1 and Comparative Example 3 (i.e. Figure 3 and Figure 10 This indicates that when the melt flow rate of dry granules is too high, their fluidity is too great after melting at the firing temperature, making it difficult to be quickly fixed on the surface of the glaze. As a result, the relief texture is easily destroyed during firing, and multiple textures are easily fused together, or even the relief effect can no longer be maintained.

[0128] Comparative Example 4

[0129] The only difference between this comparative example and Example 1 is that a lower specific gravity glaze was used in this comparative example; all other aspects are the same as in Example 1. The specific steps for preparing the mirror-finish polished rock slab in this comparative example are as follows:

[0130] (1) After pressing the green body powder into shape by press, dry it at 130℃ for 55 minutes to obtain the green body.

[0131] (2) Apply glaze to the surface of the blank using a glazing tray, with a glaze application rate of 500g / m². 2 This forms a relatively dense glaze, with the surface glaze having a specific gravity of 1.55 g / mL and a flow rate of 41 s.

[0132] (3) Dry the glaze in a small drying kiln at 110℃ for 5 minutes to dry the glaze.

[0133] (4) After cooling to a surface temperature not exceeding 55℃, the first design document is printed on the glaze surface using a multi-channel inkjet printer equipped with color ink (dispersion medium is n-propyl acetate; when dry glaze particles are applied to color ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not greater than 0.3mm) and digital mold ink (dispersion medium is isooctyl palmitate; when dry glaze particles are applied to digital mold ink with a gray level of 50-100, the distance between 200-240 mesh dry particles within 2 seconds is not less than 1mm). The inkjet volume is 25g / m³. 2 This forms a colored ink layer; then, on the areas where the colored ink has been printed, a second design file is inkjet printed using digital mold inks of different gray levels, with an inkjet volume of 45g / m². 2 This forms the ink layer of the digital mold.

[0134] (5) Apply dry granule glaze to the digital mold ink layer through a bell-shaped glaze plate, ensuring it covers the entire glaze surface. The glaze application amount is 800g / m². 2 The dry granule glaze used has a specific gravity of 1.50 g / mL, a flow rate of 35 s, a viscosity of 70 mPa·s, a particle size of 200-240 mesh, and an initial melting temperature of 1135℃. The dry granule glaze used in this embodiment consists of the following components by weight: 50 parts dry granules, 20 parts 8004c glue (mainly composed of hydroxyethyl cellulose), and 30 parts water.

[0135] (6) The semi-finished product was obtained by drying in a long drying kiln at 160°C for 15 minutes. A photograph of its surface is shown below. Figure 11 .from Figure 11 It can be seen that there is a wet-dry change in the effect ink area, and the dry particles are slightly separated by the digital mold ink, but the effect is not obvious.

[0136] (7) The semi-finished product was fired once at 1200℃ for 90 minutes. See the product photo below. Figure 12 .from Figure 12 It can be seen that the relief texture on the surface of the product after firing is not obvious.

[0137] (8) The fired product is polished, edged and coated to obtain the finished product.

[0138] Compare the experimental results of Example 1 and Comparative Example 4 (i.e.) Figure 1 , Figure 3 , Figure 11 and Figure 12 This indicates that when the specific gravity of the glaze is too low, the resulting glaze surface has a low density, making it easy for digital mold ink to penetrate into the body of the blank and cause it to blur. The effect of separating dry particles is also poor, which makes it difficult to form relief texture.

[0139] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0140] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for preparing an ultra-fine textured relief mirror-finish polished rock slab, characterized in that, Includes the following steps: (1) The green body powder is made into a green body; (2) Apply a surface glaze with a specific gravity of 1.80-1.90 g / mL to the surface of the body, and after drying, form a dense glaze surface; (3) The first design file is printed on the glazed surface using colored ink jet printing to form a colored ink layer; (4) A second design document is printed using digital mold inkjet printing on the position where colored ink has been sprayed, forming a digital mold ink layer; (5) Apply a dry granule glaze with a viscosity of 55-80 mPa·s to the ink layer of the digital mold, wherein the dry granules in the glaze have a mesh size of 200-240 mesh, and then dry, fire and polish.

2. The preparation method according to claim 1, characterized in that, In step (5), the specific gravity of the dry granular glaze is 1.45-1.55 g / mL, the flow rate is 30-35 s, and the glaze application amount is 750-900 g / mL. 2 .

3. The preparation method according to claim 1 or 2, characterized in that, In step (5), the initial melting temperature of the dry granules in the dry granule glaze is 1120-1170℃, and the firing temperature is 1175-1210℃.

4. The preparation method according to claim 1 or 2, characterized in that, In step (5), the dry granule glaze comprises the following components in parts by weight: 50-55 parts dry granules, 15-25 parts glue, and 25-35 parts water.

5. The preparation method according to claim 1, characterized in that, The dispersion medium in the digital mold ink is more oily than the dispersion medium in the color ink; when the dry granule glaze is applied to the color ink and the digital mold ink respectively, when the ink grayscale is 50-100, the distance that the 200-240 mesh dry granules are separated within 2 seconds is not greater than 0.3 mm and not less than 1 mm respectively.

6. The preparation method according to claim 1, characterized in that, In step (4), when printing the second design document by inkjet, the temperature of the glaze surface is controlled to not exceed 55°C.

7. The preparation method according to claim 1, characterized in that, In step (2), the flow rate of the glaze is 32-38 s, and the glaze application rate is 400-550 g / m³. 2 .

8. The preparation method according to claim 1, characterized in that, In step (3), the inkjet volume of the colored ink is 15-25 g / m³. 2 In step (4), the inkjet volume of the digital mold ink is 40-50 g / m³. 2 .

9. The preparation method according to claim 1, characterized in that, In step (2), the drying temperature is 130-160℃ and the time is 55-70 min; in step (5), the drying temperature is 130-160℃ and the time is 10-15 min, and the firing time is 90-120 min.

10. The preparation method according to claim 1, characterized in that, In steps (3) and (4), the same multi-channel inkjet printer is used for inkjet printing of color ink and digital mold ink.

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