What is used as a color refresher or to replace undertones in preparation for hair color?

A filler is used as a color refresher or to replace undertones in preparation for hair color application. It is particularly important when the hair has been previously colored or lightened, as it helps to restore missing pigments that may have been diminished or altered throughout the coloring process. By applying a filler, a stylist can ensure that the new color will adhere properly and achieve the desired dye result, particularly for dramatic color changes or when working with porous hair.

Fillers typically contain a mixture of color that corresponds to the desired undertones or base colors, allowing for a more even and vibrant result after the final color is applied. This step is crucial, especially when transitioning from a lighter to a darker shade, or when correcting tones in dyed hair. The use of fillers helps maintain the integrity and overall health of the hair while achieving a balanced look.

Other options like drabbers, dye intermediates, and formulas serve different purposes in the hair coloring process and do not specifically function to replace undertones or refresh color in the same way a filler does. Drabbers modify tones, and dye intermediates aid in the chemical process of developing color during the application, while formulas refer broadly to the specific combinations of color products used.