1, It is mixed with water of the paint and thinning in varnish in the deployment .
2, The diluter is used excessively when the varnish is diluted.
3, The printing surface is rough , absorbed a lot of varnish and the coating is too thin.
4, The printing surface is wet, unclean, with water and acid, salt, alkali and other substances;
5, The humidity is higher than 90% of the environment, resulting in easy to turn white and lose gloss;
6, The temperature is too low, drying slowly, water accumulates on the surface, resulting in losing gloss.