(1) Waterborne Varnish Water based Varnish (English called WATERBASE DVARNISH, also known as DISPEERSE DVARNISH), mainly composed of water-soluble resin and water-dispersed resin. Waterborne Varnish is non-toxic and tasteless. The harm to the human body and the pollution to the environment, with a fast drying speed, good film transparency, stable performance, wide adaptability of the equipment, good abrasion resistance and smoothness on the polishing surface, wide applicability after printing, and heat sealing performance Good, safe and reliable, convenient storage and transportation and other characteristics, more and more food, medicine, tobacco carton packaging and printing companies pay attention. UV waterborne varnish should pay attention to the following typical problems when using it: (1) After coating waterborne varnish, how to ensure that the underlying ink can be fully dried, we must first ensure the permeability of the waterborne varnish, so that the wet ink layer can contact To the air, oxidative conjunctiva drying is performed; this problem can also be solved by moderately increasing the temperature of the hot air. (2) The gloss of the waterborne varnish coating is lower than that of the UV varnish. In practice, a small amount of high-boiling solvent can be added to the aqueous varnish to moisturize the emulsion particles to promote the formation of a smooth coating film. Improve the surface smoothness of the coating, and ultimately achieve the purpose of improving the gloss of the waterborne coating.

(B) UV coating UV coating is the use of UV (Ultraviole abbreviation, that is, ultraviolet light) to cure the coating method. It has the characteristics of rapid solidification of coatings and low temperature curing inks that are not easily discolored, which helps to solve many problems in gloss processing of paper prints. Therefore, it has been widely used in the gloss processing of paper containers, trademarks, books, covers, and packaging boxes. application. UV Varnish is almost solvent-free and emits very little organic volatiles, thus reducing air pollution. UV Varnish does not contain solvents and does not require heat for curing. The energy required for curing is relatively small. In addition, UV varnish has strong affinity for ink and strong adhesion; UV varnish has high active component, less volatilization, and relative saving in dosage; UV varnish has more abrasion resistance, chemical resistance and resistance to the surface of the printed product after curing. Chemical, good stability, able to scrub with water and ethanol; UV glazing products are not easy to adhesion, stacking after curing can be stacked, is conducive to post-processing operations.