The main reason: UV varnish viscosity itself is too small, so that the printing coating is too thin; Excessive dilution of ethanol, toluene and other non-reactive solvents; The gloss of the resin itself is not enough; Paper absorption is too strong; Roller is too thin resulting in too little light transfer oil;

Solution: take the necessary cleaning measures for the printed matter to be glazed; Properly adjust the viscosity of light oil; Deploy the type and amount of gloss additives, can add a small amount of wetting agent; The surface of the printed matter can be wiped with a 2% alkali solution.