1. Etching silk screen of glass products. For a long time, the etching decoration of glass products is to apply a wax layer and other reinforcement materials on the surface of the glass as a resist layer, and then engrave a pattern on the coating with a needle or a knife to expose the glass surface, and then Corrosion is carried out with hydrofluoric acid on this part. This process continues to this day and is still used by manufacturers, but its processing methods are time-consuming, laborious, and inefficient.
The silk screen etching process makes the etching decoration of glass products simple, time-saving and labor-saving. There are two methods of glass screen etching, hot printing and cold printing.
Thermoplastic etching screen printing is the preparation of paraffin, asphalt, stearic acid and other adhesives, adding a small amount of anticorrosive powder to prepare anticorrosive printing materials, through hot printing screen, according to the design pattern, the printing material is scraped To the glass surface, a resist film is formed. The part of the resist film where the glass is exposed is the pattern to be etched. Etching is carried out with chlorofluoric acid. After etching, the resist layer printed on the glass should be washed away with boiling water.
Etching of glass screen printing can also be carried out by cold printing method. Anti-corrosion printing materials can use special asphalt paint plus anti-corrosion powder, or you can buy commercially available anti-ink ink. After the printing is completed, after the resist film is completely dried, hydrofluoric acid etching can be performed.
Hot stamping is suitable for the etching of two-sided continuous and four-square continuous patterns, and cold stamping is suitable for the etching of individual patterns.
2. Glass ice flower silk screen. Binghua is commonly known as orange peel, which is actually very fine low-melting glass particles. These fine glass particles have high lead content, and are available in both color and colorless colors. The hue of the color is red, yellow, blue, green, white, etc., and can also be prepared in mid-tones.
The silk screen ice flower decoration is elegant and generous, and is mostly used for architectural glass decoration and art and craft glass decoration, such as high-end glassware, lamps and other decorations.
The silk screen glass ice flower decoration is to first screen the colored or colorless glass flux layer (flux) on the surface of the glass, and then sprinkle the ice glass particles on this glass flux layer, and sinter it at 500 ℃ ～ 590 ℃ to make the glass The surface flux layer and the ice flower particle layer are fused together to produce a relief effect. If the colored flux is silk-screened on the glass, and the micro-ice is transparent, the flux layer of the glass ice pattern will fade by high temperature eutectic, and a colored, raised transparent relief pattern will be formed on the glass surface.
3. Frosted silk screen of glass. Frosting is to adhere glass glaze powder of a certain size on the product glass. After baking at a high temperature of 580 ℃ ~ 600 ℃, the glass glaze coating melts on the glass surface and shows a different color from the glass body. A decorative method. Adhering to the glass color glaze powder, it can be painted with a row of pens, or it can be rolled with a rubber roller.
Through silk screen processing, you can get the floor pattern on the matte surface. The method is as follows: on the surface of the glass product, a layer of pattern formed by the flux inhibitor is silk-screened. After the printed patterns are air-dried, the frosting process is carried out. Then, after baking at high temperature, the frosted surface without the pattern is melted on the glass surface, and the silk surface covered with the pattern cannot be fused on the glass surface due to the effect of the flux inhibitor. After baking, the transparent floor pattern will appear through the translucent sand surface, forming a special decorative effect.
Frosted screen printing flux inhibitor, composed of iron oxide, talc, clay, etc., is ground with a ball mill and has a fineness of 350 mesh. It is blended with an adhesive before screen printing.
4. Screen printing ion exchange coloring of glass. By exchanging silver with sodium ions in the glass, and then reducing it to become a metal colloid, you can get colored glass. On the transparent glass plate, the screen ink containing silver ions is used to print only the part to be colored. After firing and washing, only the printed part changes from yellow to brown. Different firing conditions will change the hue and density. Since there is no reflection difference between the uncolored part and the colored part, there is no unnatural feeling at all, just like melting and coloring glass. The coloring of the characters and marks on the glass and the heat treatment of the rear window glass of the car, as well as the brown color presented by the simple scale used in the experiment, were obtained in this way.
The screen printing ink (printing material) of this decoration process is mostly composed of silver carbonate, copper sulfate (burnt powder), iron dioxide, talc powder, etc., with a small amount of zinc powder as a catalyst.
5. The silkscreen touches the control panel. When designing the microwave oven temperature program, a switch combined with a microcomputer was used. This kind of switch is different from the ordinary mechanical switch. It is a switch printed on the glass plate. It has no moving parts and no bumps. It is very smooth and easy to remove stains. It can be switched by touch. The surface of this control panel is covered with a conductive film, and screen printing ceramic-based ink is used for decoration and text display. Its advantages are resistance to mechanical wear, chemical corrosion, and easy decontamination. In addition, in order to color the glass when designing, organic paint can be printed on the back. Since the back cannot be directly contacted, the durability is strong, and the choice of ink is also large.
6. Matte silk screen on glass surface. The matt ink juice (made in Belgium) on the surface of the glass is printed on the soda lime glass with a screen printing plate, and washed with water after a few minutes, the effect is like a brown glass. Fluoric acid is usually used when etching glass, which has certain risks. The use of this ink does not contain strong acids, and the operation is simple. Its matting effect is similar to etching.
7. The silk screen of the electric defogging device. In order to prevent condensation on the rear window glass of automobiles, more and more printed electric defogging devices are used. This screen printing method is to apply silver paste into a line on smooth glass, and fire it while bending the glass. When the rear window is blurred and fogged, let the lines heat through the current, increase the temperature of the glass surface, and remove the water vapor.
When this type of electric defogging device is powered on, some cars do not use manual switches, but automatically power on and power off. The sensor of this automatic device prints the zigzag electrode on the thin plate glass, and then covers it with a layer of moisture-sensitive body, and automatically controls the power on and off by using the humidity ratio.
8. Screen printing of liquid crystal display elements. The liquid crystal digital display element is separated by about 10 μm. The two thin glass sheets are sealed around, filled with liquid crystal, and sealed by the injection port. On these two glass surfaces, a silk screen is printed with an "8" shape of transparent conductive strands. This "8" shape is composed of 7 parts, and the voltage can be partially increased to show the number (0 ~ 5). The process of making this "8" pattern is first of all, on the field glass with the entire electrically conductive strands, the acid-resistant ink only screen prints the "8" shape, and then uses acid etching to remove Conductive strands in the printed part.
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