The manifestations of static electricity problems caused by gravure printing of food packaging bags are as follows: 1,beard. It is the ink that flies out of the edge of the printed pattern or text, in the shape of a whisker. 2, The markings of the solid printed part. Often appears in version depth5~20umThis is because the ink on the printed film has been displaced by static electricity before it dries. 3, marginal exclusion. Appears when gravure is overprinted. The junction of the film of the first color ink and the post-printed ink cannot match the second color ink well, resulting in repulsion, so that there is a white border between the two colors that cannot be printed with ink.
- The difference between biodegradable bags and ordinary PLA stic bags January 30, 2023