In hair color processes, hydrogen peroxide is mainly used as what?

Hydrogen peroxide serves primarily as a developer in hair color processes. In this role, it activates the hair dye, allowing the color molecules to penetrate the hair shaft more effectively. When mixed with hair dye, hydrogen peroxide opens up the hair cuticle, enabling the color to bond and develop properly within the hair structure. This process is crucial for achieving the desired color intensity and longevity.

While some might consider its role in lightening hair as well, the specific function of hydrogen peroxide as a developer encompasses its use in activating the dye and facilitating the overall coloring process, making it essential for both dye development and lightening effects. Through this action, it ensures that the coloring product performs as intended when applied to the hair.