Florida Cosmetology Licensing ExamChemical ServicesMedium
A client with fine, color-treated hair desires a permanent wave. During the consultation, she expresses concern about damage. Which type of permanent wave solution is most appropriate to recommend for this client's hair type and condition?
- AThio-free waves
- BExothermic waves
- CAlkaline (cold) waves
- DAcid (buffered) waves
Show answer & explanationAnswer & explanation
Correct answer: D. Acid (buffered) waves
Acid (buffered) waves have a lower pH and are less alkaline, making them gentler on fine, color-treated, or damaged hair. This helps minimize further damage while still achieving the desired curl.
Why the other options are wrong
- A. Thio-free waves are an alternative to thioglycolate but their strength still needs to be matched to hair type; not inherently the gentlest option.
- B. Exothermic waves produce their own heat but can still be alkaline or acid, and the heat might be too much for fragile hair.
- C. Alkaline waves are strong and can be too harsh for fine, color-treated hair, potentially causing damage.
Acid Permanent Waves
Perm solutions with a pH between 4.5 and 7.0, typically containing glyceryl monothioglycolate, that require heat to process and are gentler on delicate hair.
- Lower pH (acidic to neutral)
- Requires heat (endothermic)
- Recommended for porous, damaged, or color-treated hair
- Slower processing time, softer curls
Memory trick: Hair Type Determines Perm Type