UV glazing is UV glazing. It is a special coating agent for UV, which is applied to the performance or local area of ​​the printed matter precisely and evenly. It is dried and hardened at a very fast speed by ultraviolet irradiation. Generally, export products are not allowed to be coated, so UV coating is a very suitable treatment. So, what problems do we need to pay attention to during the UV glazing process? What are the solutions? Poor gloss and insufficient brightness main reason: 1. The viscosity of the UV varnish is too small and the coating is too thin; 2. Excessive dilution of non-reactive solvents such as ethanol; 3. Uneven coating; 4. The paper is too absorbent; 5, the rubberized anilox roller mesh is too thin, the oil supply is insufficient. Solution: Appropriately increase the viscosity and coating amount of UV varnish according to the different conditions of the paper; for the absorbent paper, a layer of primer can be applied first. Poor drying, incomplete curing, sticky surface main reason: 1. The intensity of ultraviolet light is insufficient; 2. The UV lamp is aging and the light intensity is weakened; 3, UV varnish storage time is too long; 4. Add too much diluent that does not participate in the reaction; 5, the machine speed is too fast. Solution: In the case where the curing speed is less than 0.5 s, the power of the high-pressure mercury lamp should generally be ensured to be not less than 120 W/cm; the lamp should be replaced in time, and if necessary, a certain amount of UV varnish curing accelerator should be added to accelerate drying. The surface of the printed matter can not be coated with UV varnish. main reason: 1. The viscosity of the UV varnish is too small and the coating is too thin; 2. The content of varnish or dry oil in the ink is too high; 3. The surface of the ink has been crystallized; 4. Too many anti-adhesive materials (silicone oil, dusting) on ​​the ink surface; 5, the rubberized anilox roller network cable is too thin; 6. Problems with the construction process. Solution: For products requiring UV glazing, appropriate measures should be taken during printing to create certain conditions; UV varnish can be appropriately thickened, if necessary, with primer or special varnish formulation. UV coating has white spots main reason: 1. The coating is too thin; 2. The glued anilox roller is too thin; 3. Adding a non-reactive diluent (such as ethanol) in excess; 4. The surface of the printed matter is dusty and so on. Solution: Keep the production environment and the surface of the printed matter clean; increase the thickness of the coating; add a small amount of smoothing aid; the diluent is preferably a reactive diluent that participates in the reaction. Article source address: http:// Storage Canister Combo,Canister Container Combo,Kitchen Storage Jars Set,Food Canister Combo Set Fucheng Metals Production Co., Ltd. of Jiangmen City , https://www.fcmp.com