Gravure ink common printing failure solution - dirty version

16. Dirty version


Symptom: This is a thin layer of ink on the non-graphic part that is transferred to the part of the substrate that should not contain ink.


Cause: The resin and solvent in the ink adhere strongly to the metal surface or have strong wettability. For example, the use of a long time or high humidity, the ink generates static electricity, a great affinity for chromium. The bark layer appears in the chromium layer, ie, the entire coating has bark-like micro-stripes; the coating is rough or has irregular spots; the blade angle is too small or the blade is blunt and scratches are not clean. When the ink starts to dry too slowly, the above situation will also be dirty.


Solution: First, reduce the viscosity of the ink and reduce its adhesion to the printing plate. If there is a problem with the chrome plating layer, it is necessary to re-print the plate, and secondly, to make the ink dry faster.

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