How is 'oxidation' defined in the context of hair coloring?

In the context of hair coloring, oxidation refers to a chemical reaction that occurs when the hair dye interacts with the hair's natural pigments and the oxygen in the air. This process is essential for developing color when using oxidative hair color products. Essentially, when hair coloring products containing hydrogen peroxide or other oxidative agents are applied, they work to lift the existing color and deposit new color into the hair strand.

During this reaction, the dye molecules undergo a transformation, allowing for a more vibrant and long-lasting color result. This fundamental principle of oxidation is what distinguishes oxidative hair color from direct dyes, which do not require the same chemical interaction to develop color. Understanding this chemical process helps barbers and stylists create various hair colors while ensuring they achieve the desired results effectively.