Analysis of special screen printing technology of

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Analysis on the special silk printing process of glass products

1. Etching screen printing of glass products. For a long time, the etching decoration of glass products is to heat coat the wax layer and other reinforcement materials on the glass surface as the anti-corrosion layer, and then carve the pattern on the coating with a needle and knife to expose the glass surface, and then corrode this part with hydrofluoric acid. This process continues to be applied by manufacturers, but its processing method is time-consuming, laborious and inefficient

silk screen etching process makes the etching and decoration of glass products simple, time-saving and labor-saving. There are two methods: cold and hot etching

thermoplastic etching silk screen printing refers to the preparation of anti-corrosion printing material by adding a small amount of anti-corrosion powder into the adhesive prepared by paraffin, asphalt and stearic acid, and scraping the printing material to the glass surface through the hot printing silk plate according to the design drawing to form a anti-corrosion film. The exposed part of the glass on the resist film is the pattern to be etched. After etching the resist layer on the glass with chlorine water

glass silk screen etching can also be carried out by cold printing. Special asphalt paint and anti-corrosion powder can be used for anti-corrosion printing materials, and commercial anti-corrosion inks can also be purchased. After printing, hydrofluoric acid corrosion can be carried out after the resist film is completely dry

hot printing is suitable for the etching of two-way continuous and four-way continuous patterns in the experiments of tensile, compression, bending, shear and other mechanical properties of the sample, and cold printing is suitable for the etching of individual patterns

2。 Glass ice screen printing. Ice flower, commonly known as orange peel pattern, is actually a very small glass particle with low melting point. This fine glass particle has high lead content and can be divided into color and colorless. The hues of color include red, yellow, blue, green and white. It can also be prepared into intermediate tones

silk screen ice flower decoration is simple and elegant. It is mostly used for architectural glass decoration and arts and crafts glass decoration, such as high-grade glassware, lamps and lanterns

screen printed glass ice decoration is to screen print a colored or colorless glass flux layer (flux) on the surface of the glass, and then sprinkle the ice glass particles on the glass flux layer. Through sintering at 500 ℃ ~ 590 ℃, the flux layer on the glass surface and the ice particle layer are fused together to produce relief effect. For example, the colored flux is silk printed on the glass, while the micro ice flower is transparent. Through high-temperature co melting, the flux layer at the part of the glass ice flower pattern will fade, and a colored and raised transparent relief pattern will be formed on the glass surface

3。 Frosted screen printing of glass. Frosting is a decorative method in which a certain area of glass colored glaze powder is adhered to the glass in process. After baking at a high temperature of 580 ℃ ~ 600 ℃, the glass colored glaze coating melts on the glass surface and shows a different color from the main body of the glass. Adhering glass colored glaze powder can be painted with a row pen or roller

through silk screen printing, the floor space pattern on the frosted surface can be obtained. The method is as follows: on the surface of glass products, a layer of pattern pattern formed by flux inhibitor is screen printed. After the printed pattern is air dried, it can be frosted. Then after high-temperature baking, the frosted surface without pattern will melt on the glass surface, while the sand surface covered on the pattern cannot be melted on the glass surface due to the action of flux inhibitor in the place of silk screen printing pattern. After baking, the transparent floor space pattern will appear through the translucent sand surface, forming a special decorative effect

matte screen printing flux inhibitor, which is composed of iron oxide, talc powder and clay. It is ground by ball mill with a fineness of 350 mesh. It is mixed with adhesive before screen printing

4。 Silk screen ion exchange coloring of glass. Colored glass can be obtained by exchanging silver with sodium ions in glass and then reducing it to metal colloid. On the transparent glass plate, only the part to be colored is printed with silk ink containing silver ions. After burning and cleaning, only the printed part changes from yellow to brown. With different firing conditions, the hue and concentration will change. Because there is no reflection difference between the non colored part and the colored part, there is no unnatural feeling at all, just like melting and coloring glass. The coloring of words and marks on the glass, the heat treatment of automobile rear window glass, and the brown color of the simplified scale used in comparative experiment are obtained by this method

the silk screen printing ink (printing material) of this decoration process is mostly composed of silver carbonate, copper sulfate (burning powder), iron dioxide, talc powder, etc., with a small amount of zinc powder as catalyst

5。 Silk screen contact control panel. When designing the temperature program of microwave oven, the switch combined with microcomputer is used. This kind of switch is different from the usual mechanical switch. It is a switch printed on the glass plate. It has no movable part, no convex and concave. It is very smooth and easy to decontaminate. It can be switched by hand. The surface of the control panel is covered with a conductive film, around which ceramic ink is printed with silk for decoration and text display. The utility model has the advantages of mechanical wear resistance, chemical corrosion resistance and easy decontamination. In addition, in order to color the glass, organic paint can be printed on the back. Because the back can not be directly contacted, the durability is strong, and the choice of ink is also large

6。 Extinction screen printing on glass surface. After several minutes of printing on the surface of glass, the printing effect is as good as that of sodium. Generally, the use of fluoric acid in glass etching is dangerous. This kind of ink does not contain strong acid and is simple to operate. Its extinction effect is similar to that of etching

7。 Silk screen printing of electric mist eliminator. In order to prevent the condensation of water vapor in the rear window of automobile, more and more printing electric mist eliminators are used. This silk screen printing method is to paint silver paste into lines on smooth glass and burn the glass while bending it. When the rear window is fogged, let the lines heat through the current, improve the temperature of the glass surface and remove water vapor

when this electric mist eliminator is powered on, some cars do not use manual switch, but automatically power on and off, such as gas power. The sensor of this automatic device prints the serrated electrode on the sheet glass with wire, and then covers it with a layer of moisture sensitive body. The power on and power off are automatically controlled by the transformation ratio of humidity

8。 Screen printing of liquid crystal display elements. The liquid crystal digital display element is placed at an interval of about 10 μ n。 The two thin glass sheets were sealed around and injected with liquid crystal, but Liansu said it benefited from the government's measures to increase infrastructure spending. The injection port was made of liquid crystal. On the surfaces of the two glasses, the transparent electrical conductive strands in the shape of "8" are silk printed. The "8" is composed of seven parts, which can partially increase the voltage to display the number of (0 ~ 5). The process of making this "8" shaped pattern is first to silk print the "8" shaped part with acid resistant ink on the field glass with the whole electric wire guide strand, and then use acid etching to remove the guide strand of the unprinted part


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