Optical Brightener

Optical Brighteners are fluorescent whitening agents, designed to brighten colors and cover yellowing in plastics, varnishes, paints, inks, photo-processing solutions, and fibers. Optical Brighteners operate by absorbing ultraviolet light and re-irradiating it as visible light in the blue range of the spectrum. It is also particularly effective in covering the yellow colors that are sometimes found in plastics and fibers after high-temperature processing and is used in layers containing pigments or dyes to make the colors look brighter.