Texas Cosmetology Operator Written ExamHair Care ServicesHard
A cosmetologist is performing a hair coloring service on a client who has 75% gray hair and desires complete coverage with a vibrant, lasting result. Which type of hair color and developer combination would be most effective?
- ATemporary hair color with no developer.
- BDemi-permanent color with 10 volume developer.
- CSemi-permanent color with no developer.
- DPermanent hair color with 20 volume developer.
Show answer & explanationAnswer & explanation
Correct answer: D. Permanent hair color with 20 volume developer.
To achieve complete coverage on 75% gray hair with vibrant, lasting results, permanent hair color with 20 volume developer is essential. Permanent color is formulated to fully penetrate the hair shaft and deposit color, while 20 volume developer provides sufficient lift and deposit for effective gray coverage.
Why the other options are wrong
- A. Temporary color merely coats the hair and washes out, offering no real gray coverage.
- B. Demi-permanent color only blends gray, it does not provide complete, lasting coverage.
- C. Semi-permanent color offers no lift and minimal gray blending, washing out quickly.
Permanent Hair Color for Gray Coverage
Permanent hair color, typically mixed with 20 volume developer, is used to achieve complete, lasting coverage of gray hair by fully penetrating the cuticle and depositing artificial pigment into the cortex.
- Required for 50% or more gray hair for full coverage.
- 20 volume developer is standard for gray coverage.
- Creates a line of demarcation as hair grows.
Memory trick: For full gray, permanent is the only way.