What color additive is known for its brightening properties?

Hydrogen peroxide is well-known in the beauty industry for its brightening properties, particularly in hair coloring and bleaching processes. It acts as an oxidizing agent, facilitating the lifting of the natural color from hair strands. When used in hair treatments, hydrogen peroxide can lighten the hair by breaking down melanin, the natural pigment in the hair. This makes it a popular choice for those looking to achieve lighter hair shades or highlights.

In contrast, ammonia serves a different purpose by helping to open the hair cuticles to allow color or lightening agents to penetrate. Dye is used to add color rather than specifically brighten, while alcohol is often used in hairstyling products for its ability to act as a solvent or drying agent, but it does not have any inherent brightening properties. Thus, hydrogen peroxide is the effective agent specifically known for its ability to brighten and lighten hair.