What is the purpose of a developer in hair coloring?

The primary purpose of a developer in hair coloring is to enable color penetration. When a developer, which contains hydrogen peroxide, is mixed with hair color, it activates the color molecules and allows them to enter the hair shaft. This process is crucial because it helps the hair color to bond with the hair structure, ensuring that the color is not just applied on the surface but actually integrates with the hair.

Developers also play a vital role in determining the level of lift in the hair color process. The strength of the developer, measured in volumes, can influence how much lightening occurs and how well the color can develop. By providing this essential activation, developers are integral to achieving the desired color outcome in hair coloring services.

While other functions related to hair color may involve moisture or lightening properties, the developer's fundamental role is to facilitate the penetration of color molecules into the hair. This critical process ensures a long-lasting and vibrant color result that adheres well to the hair.