Fluorescent Brightener is a fluorescent dye, or as a white is a complex organic compounds. It is characterized by the incident light to produce fluorescence excitation, so that the stained material was similar to Fluorite glittering effect, so that the naked eye to see the material is white, to the effect of whitening. It can absorb the invisible ultraviolet (wavelength range of about 360-380 nm), converted to longer-wavelength visible blue or purple, which can compensate for matrix do not want yellow, while reflecting the incident than the original The wavelength of 400 - 600 nm range of more visible, making products appear more white, brighter, more vivid. In daily life, many opportunities for contact with fluorescent agent. As long as no more than a certain standard, will bring many benefits to our lives. If excessive exposure to it would cause injury. Scientific experiments show that the fluorescent agent absorbed by the body, unlike the general chemical composition easily be broken. Case of a wound, so with the combination of proteins the human body, it will impede wound healing, and it is very difficult to remove, only by liver enzymes, which no doubt increased the burden on the liver, according to medical clinical trials confirmed allows cells to produce fluorescent material variation, variation fluorescent material can receive UV wavelength shorter than visible light electromagnetic waves or radiation, in these energy into longer wavelength visible light. Thus, if excessive contact with the fluorescent agent, there may be potential carcinogens. There does not prove that the number of fluorescence uptake will cause injury, but the fluorescent agent is classified as a potential cancer-causing factors.