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How long is exposure suitable for water film? In the process of printing electronic circuit board or screen printing patterns, the quality of the screen board is directly related to the quality of the printed circuit board. Although the liquid exposure image transmission process is gradually replacing the traditional screen printing process, but from the perspective of the current manufacturers, from the perspective of the operating process and production cost analysis, the traditional screen printing process is difficult to be eliminated within a certain period of time, after all, this is a mature, low-cost production process. Therefore, the network version of the production technology is worthy of our industry to seriously study and explore.2020-01-19
Photosensitive paste price how to position, choose which kind of photosensitive adhesive and you want to print paste or ink. If it is a pure solvent ink, it is suitable for oil photosensitive adhesive. However, this waterproof, printed water based paste will be degummed. If it is pure water paste, it is suitable for water sensitive light glue cans. However, this solvent resistant ink, a printing solvent ink will be degummed. If you want to print water-based (serous) inks and solvent inks, or if you want to print some special solvent inks, such as alcohol, you should apply to both water and water.2020-01-19
The color-changing materials of silk screen printing photosensitive pulps refer to the materials whose molecular structure changes under the action of a certain wavelength and light intensity. Thus, the peak absorption of light, the corresponding change in color, is generally reversible. Photochromism has been known for more than a hundred years. The first successful commercial applications began in the 1960s. Armitstead and Stooky, two materials scientists at Corning Studio in the us, first discovered the reversible photochromic effect of silver halide (AgX) glass. Subsequently, a great deal of research was conducted on its mechanism and application, and color-changing glass was developed. However, due to its high cost and complicated processing technology, it is not suitable for the production of large-area light-colored glass, which limits its commercial application in the construction field. Since then, the application of AgX photochromic technology has shifted to cheaper and lighter polymer-based materials, and the properties and applications of various new photochromic materials have begun to be systematically studied. The powder is colorless indoors and displays color when exposed to ultraviolet light outdoors. The powder contains microencapsulated color-changing particles with a particle size of 110 m, and has high temperature resistance, oxidation resistance and other microencapsulated characteristics.2020-01-19
Water film wholesale manufacturer membrane process, and put the film on the platform, then dry sieve placed in the upper end of the film, the sieve near the surface of the film, evenly spray the water to the screen, until with spray can completely wet, and then use scraper scrape off the excess water on the screen, wipe the framework on the edge of the water, wipe the water on the edge of the frame, make the membrane film to wipe out, outside the water on the screen, a layer of water carefully stick thin film on the screen, scraper scrape off the underside of film. Then scrape off excess water film surface drying: below 35 ℃ and 40 ℃, pay attention to the transparent membrane completely drying: drying after the film version of the tear film should be easy on the sieve plate, there would be no sound, the film is a kind of pre sensitizing photosensitive material, in front of the screen the exposure to paste on the screen, is hydrophilic, strong resolution, line sharpness of good, strong and durable, its performance is superior to the sensitive glue, because it is hydrophilic, therefore, commonly known as & quot; Water film & quot; .2020-01-19