What is the chemical process that lightens hair called?

The chemical process that lightens hair is known as hair bleaching or decolorization. This process involves the use of specific chemicals, typically hydrogen peroxide or other lightening agents, that break down the natural pigments present in the hair. When these pigments are broken down, the hair becomes lighter in color.

Bleaching is different from other processes like hair coloring or tinting, which typically involve adding color rather than removing it. Highlighting, on the other hand, refers to a technique where only certain strands of hair are lightened, usually to create contrast or dimension without fully decolorizing the entire head of hair. Understanding the distinction between these processes is crucial for both practical application in cosmetology and for effective communication with clients about the services being offered.