Which term refers to the gradual increase in hair color deposits on the hair?

The term referring to the gradual increase in hair color deposits on the hair is buildup. This occurs as hair products, such as color treatments, conditioners, and styling aids, accumulate over time on the hair's surface or within its structure. When hair color products are repeatedly applied, they can leave behind pigments and residues that change the appearance and texture of the hair. This buildup can lead to unwanted tones and affect the hair's overall health and manageability.

In contrast, brassy tones typically describe the unwanted yellow or orange hues that can emerge after a coloring process, particularly in blonde or lightened hair. Bleeding refers to the unwanted transfer of color from hair to other surfaces, which does not relate to gradual deposition on the hair itself. Breakage involves the physical splitting or damage of the hair shaft, indicating a health issue rather than a color deposition process. Understanding buildup is crucial for hair professionals to ensure that clients maintain optimal hair health and color integrity.