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 perm solution is generally recommended for this hair type and condition?
- AExothermic perm
- BAcid-balanced perm
- CAlkaline (cold) perm
- DThioglycolate-free perm
Show answer & explanationAnswer & explanation
Correct answer: B. Acid-balanced perm
Acid-balanced perms have a lower pH (4.5-7.0) and are gentler on the hair, making them suitable for fine, damaged, or color-treated hair. They process more slowly and produce softer, less firm curls than alkaline perms.
Why the other options are wrong
- A. Exothermic perms are a type of alkaline perm that create their own heat, which can be too harsh for fine, color-treated hair.
- C. Alkaline perms (pH 9.0-9.6) are strong and can cause damage to fine or color-treated hair, despite producing strong curls.
- D. Thioglycolate-free perms (often based on cysteamine) are an alternative for clients sensitive to thioglycolates but their gentleness varies and they aren't universally the best choice for maximum body on fine, colored hair compared to a well-formulated acid perm.
Acid-Balanced Perms
Perm solutions with a pH of 4.5-7.0, designed to be gentler on the hair, suitable for fine, damaged, or color-treated hair, producing softer curls.
- Lower pH than alkaline perms.
- Process more slowly.
- Recommended for fragile hair types.
Memory trick: Acid perms are ACID-TESTED for GENTLENESS.