Precision screen printing meshs are widely used in many industries. The principle of screen printing is not clear to many friends. Let's take a closer look below.
In fact, the core technical point of precision screen is the grasp of variable data.
Tension control of the mesh plate, 6 or 9 points test, variable points: number of times of mesh opening, mesh frame material, mesh yarn quality, stretched net angle, clean and clean.
Film thickness measuring instrument. The requirements for film thickness are mainly based on product requirements. For example, the thickness of 12μm, the sizing (coating) process is roughly
3 + 2and1 + 1; the variables that need to be controlled for the fixed film thickness are: the viscosity of the photoresist, the number of sizing, the relative humidity and the temperature meet the constant requirements.
Variables of exposure process: film adsorption, exposure time. The setting of exposure time must not ignore the film thickness and sizing process, and cannot be done overnight.
Overall, screen printing uses a screen as the base, and a photo-engraving method is used to make a screen printing screen.
Use the basic principle that screen meshes can pass ink through the screen and text, while non-picture and screen mesh cannot pass through the ink.
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