What kind of screen should I choose for glass printing?
The correct choice of different screens, on the one hand we must be familiar with the technical requirements of different products, on the other hand must have a detailed understanding of the technical parameters of the screen and their impact on the screen printing effect, by understanding the structure and physical characteristics of the screen And its performance attributes to make the right choice.
Common types of glass screen printing mesh products are: car side window and windshield decorative screen printing, building curtain wall glass label and stencil screen printing, home appliance furniture glass decorative panel screen printing. The state of the art mainly includes solid color block files, essays and lines, and color tone files. In order to achieve a reasonable screen printing effect according to different process requirements, we must pay attention to the following points of the screen.
Screen type selection For glass printing, the printing surface should be flat and uniform, mainly using polyester mesh. Polyester screen can be used for printing precision, printing resistance, acid and alkali resistance and organic solvent resistance. Meet the requirements of glass printing. In terms of the color of the screen, there are currently two main types on the market, one is a white screen and the other is a yellow screen. The white polyester mesh reflects and scatters light during exposure, and the ultraviolet light is diffused to the edge of the image to expose the photoresist film. For fine line and tone printing on glass, since the surface of the glass is a non-absorbent surface and the material is transparent, it is preferable to use a white screen for plate making. However, defects such as the jagged edges of the lines after the white screen printing and the poor resolution of the tone images are more obvious. The yellow screen can prevent the light from scattering when exposed, which is beneficial to maintain the sharpness of the edge of the image. Therefore, the yellow screen can be used for the printing of the solid color block pattern and the general graphic lines, for the fine lines requiring high precision, such as a car. The rear windshield heating line printing, the home appliance panel glass logo printing, the decorative glass tone pattern printing, etc., we recommend using a yellow screen for plate making.
Previous:Screen printing knowledge