Why the printing ink dropped when etching the aluminum foil.
3.We can watching from these aspects: there are dust,silk screen,producing ink and other material.The reason for thin ink
(may be the dust from the workshop),spraying the printing ink layer to the blister.the printing environment is bad and the light sensitivity anti-acid etching printing ink.1.the ink is bad,so under the circumstances of the same mode, the ink can be polluted.2.the net number of printing is huge.
