Becuase the sun's rays contain a large amount of harmful ultraviolet light to colored plastics, its wavelength is about 290-460 nm, these harmful ultraviolet light through chemical oxidation reduction. lead the color of the willl decomposite and loose, Uu absorbers is a light stabilizer, can absorb sunlight and fluorescent light source in the ultraviolet part, but itself does not change,so can keep coloer not changed.

UV absorber mainly inlude UV 531,UV-P.UV-0,mainly used on coloer plastics and rubbers,paints and coatings.It also called uv absorbers for coatings,uv absorbers for polymers and uv absorbers for plastics.