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 shines after film formation. It is commonly known as varnish. It can be divided into UV varnish and PU varnish. Although some people used to print local varnish directly with UV printer in the past, that practice is wrong. Local varnish has a certain technical content. It can not be printed directly with the nozzle just by filling the varnish in the ink bottle. Let's explain the reasons below!

1、 Direct printing varnish has large molecular particles and strong viscosity. Manufacturers without technology can not achieve the effect of local printing varnish, let alone actual production;

2、  In previous years, Epson nozzles were mostly used, and the spray holes are fine and easy to plug, and the printing varnish nozzle must be blocked;

3、 Printing varnish needs software support. At that time, the software was still in the development stage.