The screen printing mesh is to stretch the fabric, the synthetic fiber fabric or the metal mesh on the frame, and the screen printing plate is made by hand-engraving film or photochemical plate making. The modern screen printing technology uses a photosensitive material to make a screen printing plate by photolithography (so that the screen hole of the graphic portion on the screen printing plate is a through hole, and the mesh hole of the non-image portion is blocked. live). During printing, the ink is transferred to the substrate through the mesh of the graphic portion by the extrusion of the squeegee to form the same graphic as the original.
For water-based inks, its excellent environmental performance can solve the emissions and pollution problems in the current packaging and printing industry.
Screen printing meshs use ink knowledge. At present, the most important application areas of water-based inks are food packaging, tobacco packaging and children's toy packaging. The printing methods are mainly flexographic printing and gravure printing (Jiabaoli Chemical and Chemical Group has launched water-based screen printing of smoked packaging ink) In the US market, 40% of plastic printing uses water-based inks. In other developed countries, water-based inks have gradually become the main ink for plastic film printing. With the continuous development of green printing technology, the greening of screen printing will also face a leap-forward development. Therefore, the application of water-based ink technology to the field of screen printing will become a research focus.
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