What is the primary purpose of a color filler?

The primary purpose of a color filler is to add warmth to the final color. When working with hair color, especially during color correction or when transitioning from a lighter to a darker shade, fillers help to replace lost pigments. This is essential for achieving a rich and balanced end result. For example, if a light brown hair has been colored over with a darker shade, using a color filler can infuse warm tones to prevent the final color from appearing ashy or flat. This ensures a more harmonious color outcome that enhances the overall appearance of the hair once the desired color is applied.

Using fillers effectively addresses the challenge of color absorption in porous hair, which can result in unevenness if not properly managed. Therefore, adding warmth is a crucial function of a color filler, contributing significantly to the success of the coloring process.