California Barber Written ExamHair Care ServicesMedium
A client with fine, limp hair desires a perm that will provide maximum body and curl, but is concerned about potential damage due to previous color treatments. Which type of permanent wave solution would be most appropriate for this client?
- AThio-free perm
- BExothermic perm
- CAcid-balanced perm
- DAlkaline (cold) perm
Show answer & explanationAnswer & explanation
Correct answer: C. Acid-balanced perm
Acid-balanced perms are gentler on the hair due to their lower pH, making them suitable for colored, fragile, or porous hair. They create softer, more natural-looking curls with less damage.
Why the other options are wrong
- A. Thio-free perms rely on different reducing agents but can still be strong, and the primary concern here is pH for damaged hair.
- B. Exothermic perms generate their own heat and can be too strong for damaged hair, similar to alkaline perms.
- D. Alkaline perms are stronger and can be too harsh for fine, color-treated hair.
Acid-Balanced Perms
Permanent waves with a lower pH (typically 4.5-7.0) that are gentler on the hair, making them suitable for delicate, color-treated, or porous hair.
- Lower pH, less swelling of the hair cuticle.
- Produce softer, more natural curls.
- Require heat application (hood dryer) for processing.
Memory trick: Gentle Acid for Delicate Threads