What is the purpose of using an activator in hair coloring?

The use of an activator in hair coloring primarily serves to increase the lightening ability of hair color. Activators, such as hydrogen peroxide, work by enhancing the chemical reaction that occurs when hair dye is applied. They help in breaking down the natural pigment in the hair, allowing for lighter shades to be achieved during the coloring process. This is particularly important for achieving blondes, highlights, or any significant color change that requires lifting the natural hair color.

When hair color is mixed with an activator, it transforms the formula into an effective coloring agent that penetrates the hair shaft more deeply, ensuring that the desired color is reached. The greater the strength of the activator used, the more it can lighten the hair, which is why it is crucial for colorists to select the appropriate activator based on the desired results and the condition of the hair.