What is the cause of the striations or wrinkles on the surface of the film?

1, the viscosity of the upper light oil itself is high or the upper light temperature is too low, resulting in the poor leveling of the upper light oil, and it is easy to appear striations. It is beneficial for the uniform coating to raise the light temperature and increase the solvent dilution appropriately.

2, the amount of light oil coating is too large.

3, light oil on the surface of print ink layer wettability is not good. A solvent or surfactant with low surface tension can be added to the glazing oil appropriately.