UV ink has covered offset printing, screen printing, inkjet printing, pad printing and other fields. The traditional printing industry generally refers to UV as a printing effect process, that is, applying a layer of varnish (glossy, matte, inlaid with crystals, glitter, etc.) on a printing pattern, mainly to increase the brightness and artistic effect of the product and protect the surface of the product , and has high hardness, corrosion resistance, friction resistance, and not easy to scratch. Some laminate products are now UV coated. It is the abbreviation of UV (ultraviolet). The spectral range of industrial ultraviolet light sources is 200nm-450nm, which is divided into: ultraviolet A: 320-400 nanometers, ultraviolet B: 290-320 nanometers, ultraviolet C: 200-290 nanometers, ultraviolet rays: above 390 nanometers