TPO,TPO-L,DETX，819，907,OMBB, 184, ITX, BMS, etc., which are generally used in Ultraviolet (UV) curing technology, such as UV coating, UV ink and etch resists for Print Circuit Board (PCB). It enables wood coatings, leather ink, silk-screen ink and PCB insulating paint to cure rapidly under the irradiation of the UV light with certain wavelength, thus provides an environmental friendly technology with less volatile organic compounds release.