Product description: It is a high effective solid radical(II) photoinitiator which is suitable for low odour systems, such as varnish, plastic coating, adhesive, printing ink, ink printing plate, and especially suitable for smoke inks. We Suggest that it can be used in combination with amine synergists. Physical Properties Appearanc: White powder Purity: 99%min Melt point:82-84℃ absorption wavelength 209nm, 290nm