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

The primary purpose of a toner in hair coloring is to adjust the final tone of the hair color. After the initial bleaching or coloring process, hair may have unwanted undertones, such as brassiness or dullness. A toner is specifically formulated to refine and enhance the hue, allowing for a more desired and polished appearance. By neutralizing those unwanted tones, toners help achieve the intended shade, whether it's cooler ash tones or warmer golden hues, thus playing a crucial role in the overall hair coloring process.

Choosing a toner that complements or corrects the base color not only helps in achieving the desired aesthetic but also ensures that the hair color appears more vibrant and lively.