What is the main purpose of using toner in hair coloring?

The main purpose of using toner in hair coloring is to neutralize unwanted undertones. When hair is lightened, especially through bleaching, it can often develop undesirable shades such as brassiness or overly warm tones. Toners are specifically formulated to adjust and refine these colors by counteracting specific shades. For instance, if the hair has too much yellow after bleaching, a purple toner can be applied since purple is opposite to yellow on the color wheel, effectively neutralizing that warmth.

Toners are particularly useful for achieving the desired color result after a lightening process, allowing for more precision in color correction and enhancement of the overall final hue. This is crucial in professional hair coloring to ensure satisfaction with the end result and to achieve a specific look that complements the client’s features and preferences.