Local UV varnishing refers to the screen printing of UV varnish on a certain pattern on the original black printed matter. After applying the UV varnish, the glazing pattern is bright, bright and three-dimensional compared with the surrounding printing effect. Because the silk screen ink layer is thick, it will bulge up after curing, which looks like an indentation. Screen printing UV coating is stronger than offset printing UV in terms of height, leveling and thickness, so it has always been favored by foreign merchants.
Screen printing partial UV coating has solved the problem of adhesion on BOP or PETPPOPP after black printing, and it can also be convex. It is scratch-resistant, fold-resistant, and has low odor. This creates a large market space, which can be used in packaging, trademarks, books, publicity and other printing fields to give the finishing touch.
The equipment required for screen printing partial UV coating: exposure, printing, and ultraviolet curing. With the above hardware, you can easily have local UV coating, the UV coating area can reach 60cmX90cm wide paper, and the thickness can reach 5cm. The mesh parameters are selected according to the concentration of UV varnish and the ink back condition of printing. According to the thickness required by the customer, the thickness of the photosensitive adhesive and the sparseness and density of the mesh during the printing process are selected, generally between 350 mesh and 420 mesh.
