Our products can stop nearly all the radiation of ultraviolet ray of UV-B &UV-C and a big proporation radiation of ultraviolet ray of UV-A. It is an ideal material which can stop ultraviolet ray and set out maximum visible light. It serves as the material of quartz halogen lamps, high density discharge lamps and other UV lamps which prevent the harm to the skin of the people and other things which has to be under the exposition of UV radiation and set out the maximum visible light at the same time.