The coating method of photosensitive liquid is divided according to the operation method, and can be divided into two categories: manual coating and mechanical coating. Each category can be subdivided into several sub-categories, which are now described in detail as follows: manual coating can be divided into the following methods due to the different tools used.
â‘ Brush with a brush that does not shed hair.
â‘¡Scraping with a thin plastic plate.
â‘¢ Scrape with a stainless steel scraper.
â‘£ Casting coating method is also one of the manual coating plate making. The special thing is that instead of applying directly with tools, the photosensitive adhesive is placed in the container, and the photosensitive adhesive is directly and continuously poured on the vertically erected screen frame plate, so that the photosensitive adhesive automatically flows down on the screen Form a plate film. This plate-making method is suitable for the production of screen printing plates with special effects.
The above â‘ , â‘¡, â‘¢ manual coating is more suitable for small-size screen printing plates, and the operation is simple.
Mechanical coating mainly refers to the completion of coating of photosensitive liquid through mechanical action. Mechanical coating can be divided into semi-automatic and full-automatic coating (semi-automatic coating requires manual assistance in addition to mechanical coating. Full-automatic coating is done automatically by machinery). Mechanical coating is suitable for large-area screen coating.
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