What type of agent is usually used to lighten hair during coloring?

The appropriate agent used to lighten hair during coloring processes is an oxidizing agent. Oxidizing agents play a crucial role in hair lightening because they work through a chemical reaction that lifts the natural pigment from the hair strand. When mixed with a developer, typically hydrogen peroxide, these agents penetrate the hair shaft and release oxygen, which contributes to the oxidation of natural melanin (the pigment responsible for hair color). This process effectively removes or modifies the existing color and allows for a lighter result.

In contrast, rejuvenating, hydrating, and volumizing agents serve different purposes in hair care. Rejuvenating agents are typically used to restore vitality and health to damaged hair, while hydrating agents focus on adding moisture and improving the hair’s overall hydration level. Volumizing agents enhance thickness and fullness but do not impact hair color. Thus, understanding the distinct functions of these agents is essential for effective hair coloring and treatment practices in cosmetology.