The Causes of Screen Printing Dirty and Countermeasures

Screen printing sometimes causes smearing after printing, which is mainly caused by insufficient ink drying. Generally, when the oxidatively drying ink is printed, the scumming phenomenon is relatively large, because the screen printing ink layer is relatively thick, while the oxidative drying ink surface is dried quickly and the inside is dried slowly, when the printed matter and print or print When other objects come in contact, dirt will be created.

Cobalt desiccant or lead desiccant is generally added to the ink to increase the drying speed of the ink and prevent it from picking up. In addition, when the printed matter is stacked, it should not be stacked too much (because the overprinting of the printed matter, it is easy to produce dirt), and the printed matter must be fully dried before being stacked. The use of evaporative drying ink reduces blemishes. Strictly complying with the process requirements during printing and operating strictly according to the technical operating procedures are also an important measure to avoid smearing.

Source: Shengye Data Network