UV Varnish Common Failure Analysis - UN Varnish is not good adhesion

6, UN light oil adhesion is not good

main reason:

1. Crystallization of printed ink surface.
2. The auxiliary material in the printing ink is not suitable.
3. UV varnish itself has insufficient adhesion.
4. The light curing conditions are not suitable.

Solution: The printing process must be considered in advance glazing conditions. The printed product needs to be coated with an adhesion-enhancing primer.