How many coating methods are used for the photosensitive liquid?
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The coating method of the photosensitive liquid is divided according to the operation method, and can be divided into two types: manual coating and mechanical coating. Each category can be subdivided into several sub-categories, which are described in detail below: Manual coating can be divided into the following methods due to the different tools used.
1 Brush with a lint-free brush.
2 Scrape with a thin plastic plate.
3 Scrape with a stainless steel scraper.
4 casting coating method, also belongs to one of manual coating plate making. The special place is that instead of directly applying the tool, the photosensitive glue is placed in the container, and the photosensitive glue is directly and continuously sprayed on the vertically erected frame version, so that the photosensitive glue flows automatically downward on the screen. Forming a film. This plate making method is suitable for making screen printing plates with special effects.
The above 1, 2, and 3 manual coatings are suitable for screen printing plates of small size, and are easy to operate.
Mechanical coating mainly refers to the coating of the photosensitive liquid by mechanical action. Mechanical coating can be divided into semi-automatic and fully automatic coating (semi-automatic coating, in addition to mechanical coating, manual assistance is also required. Full-automatic coating is automatically done by machine). Mechanical coating is suitable for large area screen coating.