What is the primary function of a toner in hair coloring?

The primary function of a toner in hair coloring is to adjust or neutralize color tones. Toners are often used after the initial hair coloring process, particularly following bleaching or lightening, to refine the final color result. This is especially important when undesirable undertones, such as brassiness or excessive warmth, emerge after the lightening process.

Toners contain specific pigments that can combat these unwanted tones, allowing the stylist to achieve a more balanced and aesthetically pleasing color. For example, a toner with violet pigments can help neutralize yellow tones in blonde hair, while a toner with ash tones can diminish warmth in light brown or blonde shades. This usage highlights the importance of tonal adjustments in achieving the desired hair color outcome.

While toners can also enhance the overall appearance of hair by adding shine or promoting health, this is a secondary benefit rather than the primary function. Their main purpose lies in color correction and refinement rather than lightening hair or protecting it from damage.