Partial UV coating refers to the UV varnish printed on a certain pattern on the original color print. After the UV varnish is finished, the varnish pattern is brighter, brighter, and more powerful than the peripheral printing effect. And because the screen printing ink layer is thick, it will be convex after curing and it will look like an indentation. Screen printing UV coating from the height, leveling and thickness than offset UV strong, it has been very popular with foreign businessmen.
At present, the local UV coating of silk screen printing has solved the problem of adhesion of film BOP or PET, PP, OPP after color printing, and can also hit convex. And scratch-resistant, folding, low odor. This creates a large market space and can be applied in the printing fields such as packaging, trademarks, books, and publicity to achieve the finishing touch.
The cost of the equipment used for screen printing with local UV coating is very low, and the small amount of production will not cause waste (the out-of-pocket production cost for each edition is between 50 and 150 yuan, and it can be used repeatedly for regeneration). The equipment it needs is: printing, printing, UV curing. The entire equipment investment can be completed with only a few tens of thousands of yuan. For example, outsourcing the production of the printing plate can reduce the investment of printing equipment. The electricity consumption is about 9kw, and several staff members can easily understand it. With a little guidance, the site will occupy an area of ​​30 square meters. With the above hardware, you can easily have a local UV coating, UV coating area up to 6OcmXgOcm wide paper, thickness up to 5cm.
If you already own the hardware, it is easier to develop. You just need to pay attention to choosing the UV varnish according to the substrate, and select the parameters of the screen according to the UV varnish concentration and the ink reflow situation of the printing. According to the customer's requirements, the thickness of the emulsion and the thinness and density of the stencil during the printing process are selected, generally between 350 mesh and 420 mesh.
Source: Silkscreen World