UV ink coating one of the common fault analysis

First, the gloss is not good, the brightness is not enough

main reason:

1. UV Varnish viscosity is too small and the coating is too thin.
2. Non-reactive solvents such as ethanol are excessively diluted.
3. UV oil coating is not uniform.
4. Paper is too absorbent.
5-glued anilox roller wire is too thin. Insufficient oil supply.

Solution: Appropriately increase the viscosity and coating amount of UV varnish according to the different conditions of the paper: For the paper with strong permeability and absorbability, first coat a layer of base oil.