UV laser is cold light source. UV laser with short wavelength, focus, smaller spot, belongs to cold process with a little heat affecting, good beam quality, it can achieve perfect marking. Most materials can absorb ultraviolet laser, it is widely applied on industrial; with very little heat affecting area, it won’t have heat effect, there is no burning problem, pollution-free, non-toxic, high marking speed, high efficiency the machine performance is stable, low power consumption.