Texas Cosmetology Operator Written ExamHair Care ServicesMedium
A cosmetologist is performing a chemical texture service on a client with resistant hair. To ensure proper processing and curl formation, which type of perm solution would be most effective?
- AAcid-balanced wave
- BTrue acid wave
- CAlkaline perm
- DExothermic wave
Show answer & explanationAnswer & explanation
Correct answer: C. Alkaline perm
Alkaline perms, also known as cold waves, have a high pH and use ammonium thioglycolate to open the cuticle and penetrate resistant hair more effectively, resulting in a stronger curl.
Why the other options are wrong
- A. Acid-balanced waves have a lower pH than alkaline perms and are gentler, suitable for normal to porous hair.
- B. True acid waves have a lower pH and are less effective on resistant hair, best for delicate or damaged hair.
- D. Exothermic waves create their own heat but can be acid or alkaline; the key factor for resistant hair is the alkalinity of the solution.
Alkaline Perms (Cold Waves)
Chemical texture services with a high pH (9.0-9.6) that use ammonium thioglycolate to process hair, suitable for strong, resistant hair.
- High pH (9.0-9.6)
- Ammonium thioglycolate
- Strong curl pattern
- Best for resistant hair
Memory trick: Alkaline means 'A' for 'Aggressive' on resistant hair.