For gray coverage, which factors influence deposit and lift?

• A. Gray percentage alone determines formula
• B. Gray percentage and natural level only
• C. Gray percentage, natural level, porosity, hair condition, and blend vs complete coverage
• D. The color brand is sole factor

Answer: (C)

Gray coverage depends on several interacting factors that shape how much pigment deposits and how much lift is needed to reach the target shade. The amount of gray tells you how much deposit is required—more gray means more pigment needs to be deposited to hide white strands. The natural level shows where the hair starts on the color scale and how far you must lift to arrive at the desired tone, since some targets sit higher or deeper than the starting color. Porosity matters because it governs how readily pigment enters the hair; highly porous hair can absorb more pigment and lift differently, while low-porosity hair may resist uptake and require adjustments. Hair condition influences processing behavior as well: damaged or did not well-balanced hair can process color unevenly, so timings and formulation may need tweaks to avoid patchy results. Finally, whether you’re aiming for a blend of gray with surrounding color or full, complete coverage changes the strategy entirely—blends require careful matching to reduce contrast between gray and pigmented strands, while complete coverage pushes for uniform deposition across every strand. Taken together, these factors determine both the amount of lift and the level of deposit necessary to achieve the desired gray coverage. The other options isolate single factors or rely on brand alone, which doesn’t capture the full picture of how gray coverage is achieved.