Florida Cosmetology Licensing ExamHair ServicesMedium
A client requests a perm service. During the consultation, the cosmetologist observes that the client's hair is extremely porous due to previous chemical treatments and feels very weak. Which type of permanent wave solution would be most appropriate to minimize further damage and ensure the best results?
- AAlkaline perm
- BTrue acid perm
- CExothermic perm
- DEndothermic perm
Show answer & explanationAnswer & explanation
Correct answer: B. True acid perm
True acid perms have a lower pH (4.5-7.0) and require heat, making them gentler on fragile or previously damaged hair, which is ideal for extremely porous and weak hair.
Why the other options are wrong
- A. Alkaline perms (cold waves) have a high pH (9.0-9.6) and are too strong for fragile, porous hair.
- C. Exothermic perms generate their own heat and can be too strong or damaging for highly porous hair if not carefully monitored.
- D. Endothermic perms require an outside heat source, but their chemistry can still be too strong if not an acid-based formula.
True Acid Permanent Waves
Perms with a pH of 4.5-7.0, requiring an outside heat source to process, and are gentler on the hair.
- pH between 4.5 and 7.0
- Requires external heat (hood dryer)
- Slower processing time
- Recommended for fragile, fine, or previously colored/damaged hair
Memory trick: A 'CAT' can help you remember the main perm categories: Cold, Acid, Thio-free.