Screen printing meshs are used in many industries when printing, so what are the production methods?
Hebei maishi Trading Manufacturing Co., Ltd. is an old manufacturer of polyester mesh printing meshs. Our technical experts are highly educated and have studied abroad. We are more familiar with professional plate making methods. Below we talk about the professional manufacturing methods of the screen version.
Our company's plate making method mainly uses the indirect method of photosensitive plate making. It utilizes the chemical change of the photosensitive paste to make the photosensitive portion of the photosensitive paste cross-link harden and the screen is firmly bonded together to form a plate film. The unsensed portion is washed by water or other developing solution to form a through hole to form a screen printing. Version of the.
First, choose a screen that matches the screen to clean it, rinse it repeatedly with high pressure water, and dry it for use. Take the corresponding net frame and place it on the netting machine. After the mesh cloth is tight, fix the mesh cloth with glue. After drying, remove the net plate. Then apply the prepared photographic paste evenly on the screen, and then apply it once after drying. Drying time should not be too long or too short. The specific time needs to be mastered by the plate maker. After that, it is exposed, and the film should be checked before exposure; if the edge of the film is smooth, the writing is clear, there is no scratch, dew point, etc., and then exposed with a plate printer. When placing the frame [the one that stretches the mesh], it is usually placed in the center of the frame, or it can be placed according to the actual printing requirements. In order to achieve a good plate making effect, the angle is generally 30 degrees for the mesh, and the mesh should be completely perpendicular to the frame. Avoid exposure to holes and bubbles on the screen when exposing. You must pay attention to the front and back of the film to prevent the screen from being reversed. The most important part of the exposure process is the close attachment of the screen to the film to prevent the exposed pattern from becoming falsified or even scrapped.
Place the exposed screen in the water. During the period, the screen should be shaken to fully absorb the moisture for the photosensitive part, and then rinse with high-pressure water, and the dried image appears. Development should be completed in a short period of time, no matter what type of screen, the unsensed parts must be completely washed. [On the premise of visualization and development, the shorter the time, the better. If the time is too long, the film will be wet and wet, which will affect the sharpness of the pattern and the photoresist will be easily rotted. If the time is too short, the development will not be complete and the residual glue will cause the waste plate. The residual glue is a very thin film of residual photoresist, which is easy to be highly transparent in the details of the image. It is difficult to distinguish. It is often mistaken for obvious, but the ink cannot pass through during printing.
The above is about the problem of screen printing, professional and technical experts also give us advice to use the best screen printing mesh, otherwise no good plate making will have a good printing effect.
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