Hair bleach is a chemical product used to lighten hair color. It works by breaking down the natural pigment, called melanin, in the hair strands. This process can create a range of shades, from light blonde to platinum, depending on the strength of the bleach and the original hair color. Typically, hair bleach comes in a powder form that is mixed with a developer, which activates the bleaching process. It is important to follow instructions carefully and perform a patch test to avoid skin irritation. Proper aftercare, such as using conditioners and hair masks, is essential to maintain hair health post-bleaching.