What is the primary purpose of a color filler?

The primary purpose of a color filler is to correct unwanted tones in the hair. Color fillers are used when lightening or coloring hair to ensure a more even and desirable color result. When the hair has been pre-lightened or is transitioning from one color to another, it can develop undesirable tones, especially if the hair has underlying warm or cool pigments that affect the final appearance of the color.

Using a color filler helps to neutralize those unwanted tones by introducing complementary colors that enhance the desired shade. For example, if hair appears too brassy after a lightening service, a color filler can help to counteract that brassiness by infusing the hair with cooler tones, leading to a more balanced and natural-looking overall color. This technique is essential for achieving a vibrant and lasting color result, especially in corrective coloring scenarios.