Varnish is a kind of synthetic resin. Now it usually refers to the transparent varnish on the surface, which is made of base materials and additives without any pigment. It is commonly known as varnish. If the varnish is not used properly, there will be bubbles, dissolution and other phenomena. What is the reason for this?

1. The paint and thinner in the varnish are mixed with water during mixing;

2. Too much diluent is used when the varnish is diluted;

3. The surface of the printed object is rough, the absorption of varnish is too large, and the coating is too thin;

4. The surface of the printed object is wet and unclean, with water, acid, salt, alkali and other substances;

5. The environmental humidity on site is greater than 90%, which leads to the coating being extremely white and light loss;

6. The site temperature is too low and the drying is slow, and the water accumulates on the surface, resulting in loss of light.