Florida Cosmetology Licensing ExamChemical ServicesHard
A client has previously colored hair and now desires to go significantly lighter, requiring a full head of pre-lightening before toning. Which of the following product combinations is generally considered the safest and most effective for this process?
- ACream lightener with 10 volume developer.
- BPowder lightener with 40 volume developer.
- CPowder lightener with 20 volume developer.
- DOil lightener with 30 volume developer.
Show answer & explanationAnswer & explanation
Correct answer: C. Powder lightener with 20 volume developer.
For significant lightening on previously colored hair, a powder lightener with 20 volume developer is generally the safest and most effective. 20 volume provides controlled lift while minimizing damage, and powder lighteners are strong enough to lift artificial pigment. Higher volumes (30, 40) increase speed but also damage, especially on already processed hair. 10 volume is too weak for significant lift.
Why the other options are wrong
- A. 10 volume developer is generally too weak to achieve significant lift on previously colored hair.
- B. 40 volume developer is too strong for previously colored hair and can cause severe damage and breakage.
- D. Oil lighteners are gentler but 30 volume might still be too aggressive for previously colored hair, depending on its condition.
Lightening Previously Colored Hair
The process of removing artificial pigment from hair that has been previously colored, typically requiring a lightener and a controlled volume developer to achieve desired lift while preserving hair integrity.
- Previously colored hair is more fragile.
- Artificial pigment is harder to lift than natural.
- Lower volume developers (e.g., 20) are safer.
- Strand tests are essential to prevent damage.
Memory trick: Volume Varies, Damage Deters