Printing design on the printing products with bubbles or sand holes
There are several reasons:
1, the printing rubber head is too soft steel plate font on the ink can not suck up
2, the printing rubber head is peaceful, the air of the rubber head printed on the steel plate can not be discharged.
3. The depth of the steel plate is too shallow, and the ink layer is not enough to absorb the rubber head.
4, the ink quality and the product do not match, the ink is transferred through the glue head, the ink quality is not good raw material is too thick, will directly affect the printing effect.
5, remove the printing rubber head to check whether the damage, and the depth of the steel plate is Angle, the rubber head will leave impression marks when printing for a long time, and for a long time, the printing will also have sand holes.
How to clean the screen plate
After the web printing shutdown, the plate should be processed, otherwise the printing quality will be affected. When the printing is finished, the screen plate should be immediately cleaned with the corresponding solvent, not leaving ink, so as not to residual the ink dry solid plugging net, reprint printing loss step.
When the printing is stopped for more than 15h, the plate should be washed first and then stopped. When washing the plate, paper or plastic cloth should cover the printing table and put the flat plate.
1. When washing the plate, put the plate flat in the washing plate groove gently scrub, do not wash immediately, so as not to affect the tension of the net plate and loose net.
2. Color step printing should be produced continuously. In multi-color printing, the overprint interval between the first color and the next color should not exceed 1d (day), so as not to shrink the substrate or glass printing ink and affect the quality of screen printing.
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