Stainless steel etching process
Published： 2013/01/29     Views: 6091

Different types of etched stainless steel plates, the etching process is also different, but the process is as follows: roughly etched stainless steel plate → → degreasing → washing → erosion → washing → drying → screen printing dry in 2 ~ 3min → → flooding etching pattern text → washing → dyeing or plating → washing → hot water washing → → In addition to the ink → washing → pickling → washing → electrolytic polishing → → drying → soft cloth polishing (polishing) light spray clearcoat → drying → test → finished packaging.
1. Etching pretreatment
Before the stainless steel etching processes are pre-treatment, it is to ensure that the screen printing ink and etched stainless steel plate surface with good adhesion of the key processes, and therefore must completely remove the oil on the surface oxide film of etched stainless steel plate etching. Oil removal should be set according to the workpiece the oil program, the best in the electrolytic degreasing before silkscreen guarantee degreasing effect. In addition to the oxide film should choose the best according to the type and thickness of the stainless steel etching plate etching solutions to ensure that the surface is clean. To dry before screen printing, and if there is moisture, will also affect the adhesion of the ink, and influence the subsequent pattern etched effect even aliasing, decorative effect.
2. Screen printing
Screen printing according to the needs of the printing production standard pattern silk screen stencil. Pattern decorating process, screen printing mainly play a protective role, coated with photosensitive emulsion, the number of times you want more, so thick stencil, so that makes covering performance, high definition etched pattern. Screen version of the film under the action of light, a photochemical reaction, so that the light portion cross-linked into a water-insoluble film, and not light was partially dissolved in water and the exposed mesh spaces, thus coated with a film The screen version glazing carve meet slipping through the net pattern the Black Bai Zhengyang piece pattern.
Screen printing stencil with a pattern of the fixed screen printers, the use of alkali-soluble antacid ink, and printing out the desired pattern, etching can be carried out after drying the etched stainless steel plate board.
3. After the etching processing
Stainless steel etching must be removed after the printing ink. Usually antacid ink is soluble in alkali. The etching plate was immersed in a solution of sodium hydroxide of 40 ~ 60g / L, a temperature of 50 to 80 ° C, the impregnated the few minutes receded ink. After stripping, if required high brightness, can be polished, and then dyed, after dyeing, in order to prevent discoloration and increase the abrasion resistance, corrosion resistance, can be sprayed onto the transparent lacquer. For some stainless steel etching plate corrosion performance and does not stain, can also be coated with clear lacquer, according to actual needs