CN106186699B - Preparation method for ceramic with bright-colored image - Google Patents

Abstract

The invention provides a method for preparing ceramics with bright images, comprising the following steps: 1. image processing; selecting at least one monochromatic color in the image to develop a silk screen; 2. preparing blanks; 3. Print the pattern on the surface of the material by inkjet; 4. Print the selected color on the surface of the blank by screen printing; 5. Fire it in a kiln to obtain a semi-finished product; , into the kiln and fired to obtain ceramics with bright images. By adopting the scheme of image pretreatment, combining the advantages of bright color of screen printing and high definition of inkjet printing capable of making complex images, ceramic products with bright images are obtained. Moreover, the production efficiency is high, the equipment cost is low, the color of the finished product is bright, and the color transition is natural.

Description

A method for preparing ceramics with vivid images

technical field

The invention relates to the field of ceramic production, in particular to a method for preparing ceramics with vivid images.

Background technique

The patterns on the surface of traditional ceramics are mostly drawn by hand, and the colors are bright and beautiful, which are loved by consumers. However, traditional ceramics have high requirements on the painters. When the pattern is complicated, the production efficiency is low, the scrap rate is high, and the labor intensity is high.

After technological development, a ceramic screen printing process has emerged, such as the Chinese patent document CN104924789A, which records a ceramic screen printing process for environmental protection, using a special printing colorant, covering the screen on the blank, and using a squeegee Uniform extrusion and smearing make the color material permeate through the pattern on the screen, remove the screen, the color material solidifies on the white blank to form a printing pattern, glaze it, and put it into a high-temperature kiln for firing to obtain a printed ceramic product. The ceramic product produced by the technical method provided by the invention not only has bright colors and good neatness, but also complements the advantages of painted colors and decals.

Chinese patent document CN 103351712A records a ceramic screen printing ink, which has strong adhesion to ceramics, is not easy to fall off, has strong coloring power, excellent printing effect and full of three-dimensional effect.

However, the above printing method has great defects, that is, screen printing is affected by the printing method, the printing accuracy is not high, the definition is not enough, and only one color can be printed at a time, it is difficult to register between multiple colors, and the transition color is difficult to express .

With further development, ceramic ink inkjet printing process has emerged, using nozzles to spray ceramic ink on the surface of ceramics to obtain high-definition images. For example, Chinese patent document CN102433044A describes an ink for 3D digital inkjet tiles, which has high definition, three-dimensional effect and mirror effect. However, the problem with the inkjet process is that in order to ensure the accuracy of inkjet, the color and auxiliary material particles usually need to be very small in size, and the smaller particle size is very easy to change color due to oxidation during the firing process, resulting in bright colors. The degree, that is, the color saturation cannot be guaranteed, and the color is obscure, which affects the appearance effect. Moreover, the inkjet process is prone to more defects, such as horizontal lines in large color blocks, broken lines caused by lack of ink, uneven transition colors, etc., and it is difficult to overcome them through technical means. Only the nozzle can be replaced, resulting in cost rise.

There are also decal printing process and roller printing process, among which the decal printing process is similar to the thermal transfer process, which can only be operated manually, and the efficiency is low. However, gravure printing is mostly used in cylinder printing, the cost of plate making is very expensive, the cost of equipment is also very high, and the operation is complicated.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for preparing ceramics with bright images, which can mass-produce ceramic products with bright images at a lower cost. Effect.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a method for preparing ceramics with vivid images, comprising the following steps:

1. Image processing;

Selecting at least one monochromatic color in the image to develop a screen version;

2. Preparation of billets;

3. Print patterns on the surface of the blank by inkjet;

4. Print the selected color on the surface of the blank by screen printing;

5. Firing in a kiln to obtain semi-finished products;

6. Coat the surface glaze on the semi-finished product;

7. Firing in a kiln to form a rough surface structure and obtain ceramics with bright images.

In a preferred solution, the color development refers to visually prominent color blocks, larger-area color blocks and color blocks that require bright colors.

In a preferred solution, the transition color in the color development is made in the form of a net pattern, the darker part has larger dots, and the lighter part has smaller dots.

In a preferred solution, in step 2, the blank is sintered and dried.

In the preferred scheme, in step 3, before inkjet, the transition color is optimized, the image setting is converted to CMYK color mode, and the transition color is transitioned with no more than three colors.

In a preferred scheme, the transition color is transitioned with no more than two colors.

In a preferred solution, in step 3, before ink jetting, the surface of the blank is polished to ensure smoothness and to block micropores.

In a preferred solution, the glaze is powder, which is printed on the surface of the semi-finished product by screen printing.

In a preferred scheme, the top glaze includes the following components in parts by weight:

Frit 40-50, potassium feldspar 10-20, clay 3-7, quartz 28-32, titanium oxide 8-12, titanium dioxide 3-5, iron oxide 3-7, lead oxide 3-6, three 5-6 parts of antimony oxide, 3-6 parts of sodium fluorosilicate, 3-6 parts of zirconium silicate; 2-6 parts of kaolin; 0.5-2 parts of pigment,

Among them: the raw materials of frit are: 64% silicon dioxide, 7% aluminum oxide, 1% iron oxide, 8% calcium oxide, 0.5% magnesium oxide, 4% potassium oxide, 4% sodium oxide, three Diboron oxide 11%, zinc oxide 0.5%.

In a preferred solution, the texture of the surface glaze is made according to the image, and the texture of the visually protruding part of the image is larger, and the texture of the concave part is smaller.

A preparation method of ceramics with bright images provided by the present invention, by adopting the scheme of image pretreatment, combining the advantages of bright colors of screen printing and high definition of inkjet printing, which can make complex images, obtains ceramics with bright images products. Moreover, the production efficiency is high, the equipment cost is low, the finished product is bright in color, and the color transition is natural. In the preferred solution, use the surface glaze of powder and use the method of screen printing to form an uneven surface structure according to the image. The highest and lowest points can reach 5mm, and the finished product after firing can form a glass with a three-dimensional effect of relief. Layers, due to the reflection and refraction of light, cooperate with the bright images on the bottom layer to have a unique artistic effect. The surface glaze of the invention has good acid and alkali resistance, good glaze smoothness, good glaze slurry performance, wide firing range, and the glaze is not easy to fall off due to wear resistance; and also has good thermal shock resistance.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

Fig. 1 is the original image of the present invention.

Fig. 2 is a plate-making image developed in the present invention.

Fig. 3 is another color-developed plate-making image in the present invention.

Fig. 4 is another color-developed plate-making image in the present invention.

detailed description

A method for preparing ceramics with vivid images, comprising the following steps:

1. Image processing;

Selecting at least one monochromatic color in the image to develop a screen version;

In a preferred solution, the color development refers to visually prominent color blocks, larger-area color blocks and color blocks that require bright colors.

As shown in Figures 1 to 4, in Figure 1, the selected colors after comparison are red, gold and blue, among which red is a visually prominent color block, as shown in Figure 2, and formed in the inkjet printing method Among the colors, red and pink are difficult to ensure a bright effect. According to the analysis, it may be due to the oxidation of the colorant during the high-temperature firing process, and the low particle size and content of the colorant in the inkjet ink, which makes it difficult to develop color. So choose red as one of the color rendering. Through screen printing, it is possible to obtain bright colors with accurate hue, high color saturation and high gloss. The method of screen printing can also have the effect of three-dimensional relief.

Gold is a color block that requires bright colors. As shown in Figure 3, in the gold formed by inkjet printing, the finished product is displayed as brown, and the effect is not good. The method of screen printing is used, especially The metal-containing powder is printed in gold, which has a very bright effect, high reflectivity, saturated color, and can have a three-dimensional relief effect, and the artistic effect is perfect.

Blue is a color block with a large area, as shown in Figure 4, the screen printing method can avoid common defects such as horizontal lines and broken lines, improve the appearance of the product, and reduce the scrap rate.

In a preferred solution, the transition color in the color development is made in the form of a net pattern, the darker part has larger dots, and the lighter part has smaller dots.

2. Preparation of billets;

In a preferred solution, in step 2, the blank is sintered and dried. The preparation of blanks is commonly used in the prior art, and will not be repeated here.

3. Print patterns on the surface of the blank by inkjet;

In a preferred solution, in step 3, before ink jetting, the surface of the blank is polished to ensure smoothness and to block micropores. With this structure, the surface of the blank is kept flat, which is beneficial to improving image precision and facilitating ink adhesion. Blocking the micropores on the surface can prevent too much ink from entering the surface of the blank and affecting the color development. The way to block micropores is to polish the surface of the surface blank with a polishing disc, and the polishing time is shorter than the normal polishing time.

In the preferred scheme, in step 3, before inkjet, the transition color is optimized, the image setting is converted to CMYK color mode, and the transition color is transitioned with no more than three colors.

In a further preferred solution, the transition color is transitioned with no more than two colors.

For example, in the pink transition color in Figure 1, some colors are displayed as C20M70Y20, and some colors are displayed as C3M10Y5. During the inkjet process, ink droplets of three colors will be sprayed here. Due to errors in the inkjet process, it is easy to form , The blemishes of variegated dots, the more colored ink droplets, the higher the probability of forming variegated dots, which will affect the appearance of the finished product. Optimizing the transition color to transition from M75Y20 to M5Y1 will make the color transition more pure, and almost no noise points will be formed, which improves the appearance effect.

4. Print the selected color on the surface of the blank by screen printing; for example, red, gold and blue as shown in Figures 2 to 4 obtained in step 1. The three colors are printed separately, and the photoelectric sensor is used for color registration, and the printing speed is 20 m/min.

5. Firing in a kiln to obtain a semi-finished product; the firing temperature is 1080°C~1250°C.

6. Coat the surface glaze on the semi-finished product;

In a preferred solution, the glaze is powder, which is printed on the surface of the semi-finished product by screen printing.

In a preferred solution, the height of the top glaze stack is 1-5mm. to form a three-dimensional effect.

In a preferred scheme, the top glaze includes the following components in parts by weight:

Frit 40-50, potassium feldspar 10-20, clay 3-7, quartz 28-32, titanium oxide 8-12, titanium dioxide 3-5, iron oxide 3-7, lead oxide 3-6, three 5-6 parts of antimony oxide, 3-6 parts of sodium fluorosilicate, 3-6 parts of zirconium silicate; 2-6 parts of kaolin; 0.5-2 parts of pigment,

Among them: the raw materials of frit are: 64% silicon dioxide, 7% aluminum oxide, 1% iron oxide, 8% calcium oxide, 0.5% magnesium oxide, 4% potassium oxide, 4% sodium oxide, three Diboron oxide 11%, zinc oxide 0.5%.

According to different effects, you can also add 2~3 parts of SrO, 4-6 parts of ZnO, 4~5 parts of K ₂ O, 3~5 parts of Na ₂ O, 3~5 parts of Li ₂ O, and 8~12 parts of B2O3.

The surface glaze can have a lighter color, such as adding Co-Al-Zn to the bluish color, Fe-Cr-Zn to the red color, and Zr-Fe-Si to the yellow color.

In a preferred solution, the texture of the surface glaze is made according to the image, and the texture of the visually protruding part of the image is larger, and the texture of the concave part is smaller. According to the scheme, ceramics with relief three-dimensional effect are obtained.

After firing, the three-dimensional surface glaze formed is a curved surface, and the height of the highest point can reach 5mm and gradually transition to the edge. In the position of the gap, there may be no surface glaze, thus forming a contrast in reflectivity and forming a unique artistic effect.

7. Firing in a kiln at a firing temperature of 1080°C to 1500°C to obtain ceramics with bright images.

The above-mentioned embodiments are only preferred technical solutions of the present invention, and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solution described in the claims, including the equivalent of technical features in the technical solutions described in the claims. The alternative is the scope of protection. That is, equivalent replacement and improvement within this range are also within the protection scope of the present invention.

Claims (3)

1. A method for preparing ceramics with vivid images, characterized in that it may further comprise the steps: 1. Image processing; Selecting at least one monochromatic color in the image to develop a screen version; The color development refers to visually prominent color blocks, larger-area color blocks and color blocks that require bright colors; The transition color in the color rendering is made in the form of a net pattern, the thicker part has larger dots, and the lighter part has smaller dots; 2. Preparation of billets; The blank is sintered and dried; 3. Print patterns on the surface of the blank by inkjet; Before inkjet, optimize the transition color, convert the image setting to CMYK color mode, and transition the transition color with no more than three colors; 4. Print the selected color on the surface of the blank by screen printing; 5. Firing in a kiln to obtain semi-finished products; 6. Coat the surface glaze on the semi-finished product; The glaze is powder, which is printed on the surface of the semi-finished product by screen printing; The texture of the surface glaze is made according to the image, the texture of the convex part of the image is larger, and the texture of the concave part is smaller; 7. Firing in a kiln to form a rough surface structure and obtain ceramics with bright images. 2. A method for preparing ceramics with vivid images according to claim 1, characterized in that: transition colors are transitioned with no more than two colors. 3. A method for preparing ceramics with vivid images according to claim 1, characterized in that: in step 3, before ink jetting, the surface of the blank is polished to ensure smoothness and micropores are blocked.