Varnishing refers to coating or printing a layer of colorless and transparent ink or raw material on the surface of printed matter (commonly known as "varnish"). After drying or even calendering, the surface gloss and smoothness of printed matter are greatly increased. , Highlighting the grade of printed matter. Secondly, glazing can improve the abrasion resistance of the printed surface and protect the graphics of printed products. For printed finished products that have been processed, the common practice is to use silk screen UV glazing and coating glazing, while the more advanced glazing is to be completed at the same time as on-line operation and printing. Due to different raw materials and glazing methods, Of course, these kinds of glazing effects are also different.