Which statement describes oxidative haircolor?

Oxidative haircolor is a type of hair dye that requires a chemical reaction in order to achieve permanent or long-lasting color. This process involves mixing the color with hydrogen peroxide, which acts as an oxidizing agent. When the two components are combined, the molecules of the hair dye are able to penetrate the hair shaft and create a lasting change in color. This mix not only deposits color but also can lighten the natural pigment in the hair.

The ability of oxidative haircolor to change both the color and structure of the hair is what distinguishes it from other types of haircolor, such as temporary or semi-permanent dyes, which do not require an activator and only coat the hair's surface rather than penetrating it. Understanding the chemical reactions involved in oxidative haircoloring is crucial for achieving desired results and ensuring the health of the hair during the coloring process.