What we should know is that screen printing screen printing is actually about stretching silk fabrics, synthetic fabrics or wire mesh on the frame, and making screen printing plates by hand-engraving or photochemical plate making. The economic development is fast, and the screen printing technology has also made great progress. It is to use the photosensitive material to make the screen printing plate by photolithography (so that the screen hole on the graphic part of the screen printing plate is a through hole, instead of the graphic Some of the screen holes are blocked. Oil paintings, prints, posters, business cards, binding covers, merchandise packaging, merchandise signs, printing and dyeing textiles, glass and metal plane carriers. We use screen printing pressure and speed in the process of how to pay attention to such problems.
1. How to control the pressure
Screen printing screen printing pressure is to ensure that the screen and the printing surface are in full line contact, under this premise, the smaller the better. Because the pressure is higher, the blade is in contact with the screen, but the degree of flattening of the screen And the degree of the blade is embedded in the mesh, so the amount of ink is small, and the deformation of the blade is larger, which will have a greater impact on the state of the oil filling, and will also increase the deformation of the screen, and the blade and the net The friction between the plates will also increase, which will increase the friction on the screen and affect the speed of the printing.
2, how to control the speed
The speed in screen printing mesh printing refers to the speed of the blade before printing. The printing speed is too slow. Although the ink filling is better, the ink penetration phenomenon will appear at the edge of the pattern, causing the pattern to expand; the knife speed is too fast, will Insufficient ink filling, incomplete imprinting, and the speed of ink discharge can not keep up with the printing speed, resulting in too long adhesion stage and affecting printing quality. Ink viscosity, large fluidity, knife speed is slower, and vice versa; The mesh with a high number of meshes and a small mesh area can slow down the speed of the scraper during the wire brushing. In the printing process, it is necessary not only to grasp the speed of the scraper, but also to pay attention to the uniform speed of the scraping. If it is slow or slow, Strip marks on the substrate will affect the print quality.
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