Florida Cosmetology Licensing ExamChemical ServicesMedium
A cosmetologist is performing a virgin application of an oxidative permanent hair color. The client has natural level 5 (light brown) hair and wants to achieve a level 7 (medium blonde). Which developer volume would be most appropriate to achieve this result?
- A20 volume
- B30 volume
- C40 volume
- D10 volume
Show answer & explanationAnswer & explanation
Correct answer: B. 30 volume
To lift natural hair three levels (from 5 to 7), a 30 volume hydrogen peroxide developer is typically required. 10 volume is for depositing color or minimal lift, 20 volume for 1-2 levels of lift, and 40 volume for 4+ levels of lift, which can be too aggressive for a 3-level lift.
Why the other options are wrong
- A. 20 volume developer provides 1-2 levels of lift, which is insufficient to go from a level 5 to a level 7.
- C. 40 volume developer provides 3-4 levels of lift, which would likely result in too much lift and potential damage for this specific goal.
- D. 10 volume developer provides 0-1 level of lift, primarily for depositing color or going darker.
Developer Volume for Lift
The concentration of hydrogen peroxide in a developer, which determines its ability to lift (lighten) natural hair pigment. Higher volumes provide more lift.
- 10 vol: 0-1 level lift, deposit only.
- 20 vol: 1-2 levels lift, gray coverage.
- 30 vol: 2-3 levels lift.
- 40 vol: 3-4 levels lift (use with caution).
Memory trick: Developer Volume Lifts Levels!