California Cosmetology Written ExamChemical Texture ServicesHard
A client with hair previously lightened using a high-volume bleach requests a permanent wave. Compared to virgin hair, how should the cosmetologist adjust the service to prevent damage?
- AIncrease heat during processing to speed penetration through the raised cuticle
- BApply the same ammonium thioglycolate concentration used on resistant virgin hair without modification
- CUse a stronger alkaline solution and extend the processing time to compensate for resistant cuticle
- DSelect a gentler, lower-pH solution, shorten processing time, and monitor closely with test curls
Show answer & explanationAnswer & explanation
Correct answer: D. Select a gentler, lower-pH solution, shorten processing time, and monitor closely with test curls
Previously lightened hair has increased porosity and a compromised cuticle, absorbing chemicals faster and more unevenly than virgin hair. To prevent overprocessing and breakage, the cosmetologist should choose a gentler, lower-pH perm solution, reduce processing time, and check progress frequently with test curls.
Why the other options are wrong
- A. Added heat would accelerate processing further, risking severe overprocessing and breakage.
- B. Using the resistant-hair concentration ignores the increased porosity of lightened hair.
- C. Stronger solution and longer time would overprocess already porous, damaged hair.
Perming Chemically Treated Hair
Previously lightened or color-treated hair has higher porosity than virgin hair and requires a gentler solution, shorter processing time, and frequent test curls to avoid overprocessing.
- Lightened hair has raised, damaged cuticle
- Increased porosity absorbs chemicals faster
- Requires milder solution and shorter processing with monitoring
Memory trick: 'Porous hair Panics fast' — go gentle and check often