What is the main function of a high-volume developer in hair coloring?

The main function of a high-volume developer in hair coloring is to lighten and deposit color. High-volume developers typically contain a higher concentration of hydrogen peroxide, which allows them to penetrate the hair cuticle effectively. This penetration is crucial when trying to achieve significant lightening or when applying hair color that requires a developer to lift the natural pigment while simultaneously depositing the new color.

When using high-volume developers, stylists aim to create a more dramatic change in hair color. For example, when lightening dark hair, a high-volume developer enables more extensive lifting than a lower-volume developer would. This is especially important for achieving vibrant colors or achieving a desired lift in preparation for further coloring processes.

The other functions mentioned in the incorrect choices do not align with the primary purpose of a high-volume developer. Cleansing the hair is typically done with shampoo or other cleansing agents, and while some products may enhance shine or provide nourishment, those tasks correspond to different types of treatments and not specifically to the function of a high-volume developer in the context of hair coloring.