With the increasing popularity of UV curing technology in the printing industry, a printing method using UV-LED as curing light source has attracted more and more attention of printing enterprises. UV-LED is a kind of LED, which is single wavelength invisible light. It can be divided into four bands: long wave UVA, medium wave UVB, short wave UVC and vacuum wave UVD. The longer the wavelength is, the stronger the penetrability is, generally below 400nm. UV-LED wavelengths used in printing industry are mainly 365nm and 395nm.

Requirements for printing materials

UV-LED printing can be applied to non absorbent materials, such as PE, PVC, etc.; metal materials, such as tinplate; paper, such as coated paper, gold and silver cardboard, etc. UV-LED printing greatly expands the range of substrate, enabling offset printing to print products such as mobile phone back cover