At present, the quality of cosmetics is uneven and the illegal cost is low. If a product advertises that it has various functions, especially quick-acting whitening, then consumers should be careful. It may contain fluorescent whitening agent, because the mask containing fluorescent agent will feel quick and the whitening effect is obvious.

If you have doubts about the product and feel uneasy, just test it yourself. The easiest way is to irradiate with ultraviolet rays at night, and blue means fluorescent agent. The ultraviolet light can be blue light emitted by the pen of the money detector, and of course other ultraviolet detection lights can also be used.