Causes of uneven thickness of gravure printing ink

Description: In gravure printing, uneven ink film thickness occurs from time to time. There are many reasons for uneven ink. In the case of gravure ink, it is poor ink blending, or the ink is accidentally mixed into the ink when the ink is blended. At that time, the ink swells or softens due to the addition of solvent. Blocking the mesh holes that should be ink-permeable causes the effect of the plate film, making the ink unable to pass normally.

In order to prevent this kind of failure, the gravure ink (especially the old ink) after deployment should be filtered once with a net before use. When reusing a used printing plate, the old ink attached to the plate frame must be completely removed. When storing the printing plate after printing, wash it sufficiently (including the squeegee). If you follow the above requirements, the uneven ink will not happen.

If the tip of the front end of the scraper is damaged, there will be traces along the movement direction of the scraper. Especially when printing transparent materials, there will be obvious ink unevenness. Therefore, the front end of the scraper must be well protected so that it will not be damaged. If it is damaged, it must be carefully polished with a grinder.