What Kinds Of Fluorescent Whitening Agents Are There?

Fluorescent whitening agent, commonly known as white dye, is a colorless inorganic compound that can stimulate fluorescence under ultraviolet light. It can improve the whiteness and luster of substances. The whitening effect is based on the principle of optical complementary color. After the yellowing substance is treated with fluorescent whitening agent, it can not only reflect visible light, but also absorb ultraviolet light outside visible light and turn it into visible light with purple-blue or blue color. Yellow and blue complement each other, counteracting the original yellow of the substance, making it appear white.