The surface tension value of the varnish oil is large, and the wettability of the ink layer on the surface of the printed matter is not good, the surface tension value should be reduced, and the wettability of the ink layer to the coating should be improved.
The solvent in the paint is poorly volatilized, and the residual solvent in the coating is high. The solvent with high volatilization rate may be used or the coating may be completely dried and then calendered; the speed may be too fast in the coating and the drying temperature may be low. If the coating is completely dried and solvent volatilization is incomplete, the coating process conditions should be adjusted.
The ink layer on the surface of the printed matter can also cause crystallization. This should take effective measures, such as removing the oily surface of the ink layer or performing hair treatment, and improving the wetting of the ink by the coating oil to weaken or eliminate the ink. Layer crystallization adverse effects on coating.
The solvent in the paint is poorly volatilized, and the residual solvent in the coating is high. The solvent with high volatilization rate may be used or the coating may be completely dried and then calendered; the speed may be too fast in the coating and the drying temperature may be low. If the coating is completely dried and solvent volatilization is incomplete, the coating process conditions should be adjusted.
The ink layer on the surface of the printed matter can also cause crystallization. This should take effective measures, such as removing the oily surface of the ink layer or performing hair treatment, and improving the wetting of the ink by the coating oil to weaken or eliminate the ink. Layer crystallization adverse effects on coating.
Anping County Hua Guang Wire Mesh Production Co.,Ltd , https://www1.hgwirefence.com