What type of product requires hydrogen peroxide to develop permanent color?

Oxidative hair color is the correct answer because it relies on a chemical reaction that occurs when hydrogen peroxide oxidizes the dye precursors present in the formula. This reaction allows the color to penetrate the hair shaft and create a lasting change in hair color.

In the case of oxidative hair color, the hydrogen peroxide acts as a developer, facilitating the dyeing process by opening up the cuticle layer of the hair and allowing the color molecules to enter. This process not only deposits color but can also lighten natural hair pigment, providing a more permanent and durable result.

On the other hand, temporary hair color does not require a developer like hydrogen peroxide; it typically coats the outer layer of the hair and can be washed out easily. Direct dye also does not use any oxidation process, as it immediately imparts color without requiring any developer. Finally, vegetable dye, which is derived from natural sources, generally doesn’t include hydrogen peroxide in its formulation and operates differently in terms of adherence and longevity on the hair. Thus, oxidative hair color uniquely necessitates hydrogen peroxide for development and lasting results.