Florida Cosmetology Licensing ExamChemical ServicesHard
A client has natural black hair and wishes to achieve a level 7 (medium blonde) in a single process. What strength of hydrogen peroxide developer would typically be required to achieve this significant lift?
- A20 volume peroxide
- B40 volume peroxide
- C10 volume peroxide
- D30 volume peroxide
Show answer & explanationAnswer & explanation
Correct answer: B. 40 volume peroxide
To achieve a significant lift of 5 levels (from natural black, level 2, to medium blonde, level 7) in a single process, a 40 volume hydrogen peroxide developer is typically required. While it provides maximum lift, it also increases the risk of damage.
Why the other options are wrong
- A. 20 volume peroxide provides 1-2 levels of lift and is standard for gray coverage and most coloring.
- C. 10 volume peroxide is used for depositing color without lift or for darkening.
- D. 30 volume peroxide provides 2-3 levels of lift, suitable for lighter blondes or significant color changes.
Hydrogen Peroxide Developer Volume
The concentration of hydrogen peroxide in a developer, which determines the amount of lift (lightening) it provides when mixed with hair color or lightener.
- 10 Volume: Deposits color, no lift, or 1 level on very fine hair.
- 20 Volume: 1-2 levels of lift, standard for gray coverage.
- 30 Volume: 2-3 levels of lift, for lighter results.
- 40 Volume: 3-4 levels of lift (up to 5 on natural hair), for maximum lightening, higher damage risk.
Memory trick: To go 'Up' many levels, you need 'High Volume' peroxide, like a '40' record.