California Cosmetology Written ExamHaircoloringMedium
A client's hair is 50% gray, and she wants to achieve a target level 6 natural-looking result. Using the standard gray coverage formula, what ratio of natural-level shade to target-level shade should typically be used?
- A50% natural level / 50% target level
- B25% natural level / 75% target level
- C100% natural level with no target shade
- D75% natural level / 25% target level
Show answer & explanationAnswer & explanation
Correct answer: A. 50% natural level / 50% target level
A common gray coverage formulation rule matches the percentage of gray to the same percentage of the natural level shade in the formula; 50% gray hair typically requires a 50/50 blend of the natural level and the target shade to achieve full coverage with natural-looking results.
Why the other options are wrong
- B. This ratio would be used for lower gray percentages (about 25%).
- C. Using no target shade would not achieve the desired result color.
- D. This ratio is used for higher gray percentages, around 75%.
Gray Coverage Formula
A formulation guideline matching the percentage of gray hair to the percentage of natural-level shade included in the color formula.
- % gray ≈ % of natural level shade used
- Remaining % is the target/desired shade
- Ensures natural blending and full coverage
Memory trick: Match the gray percent with the same percent of natural shade.