Texas Cosmetology Operator Written ExamHair Care ServicesMedium
A cosmetologist is performing a chemical texture service on a client with very resistant, coarse hair that struggles to hold a curl. Which type of perm solution would typically be most effective for creating a strong, lasting curl pattern on this hair type?
- AAlkaline perm (cold wave)
- BThio-free perm with a very low pH
- CLow-pH acid-balanced perm
- DTrue acid perm
Show answer & explanationAnswer & explanation
Correct answer: A. Alkaline perm (cold wave)
Alkaline perms, also known as cold waves, have a high pH (9.0-9.6) and use ammonium thioglycolate (ATG) to quickly and effectively break the disulfide bonds in resistant, coarse hair, creating strong, firm curls without the need for external heat.
Why the other options are wrong
- B. While thio-free perms exist, a very low pH would make it gentle, not strong enough for very resistant hair.
- C. Low-pH acid-balanced perms are gentler than alkaline perms and are better suited for fragile hair, not resistant hair.
- D. True acid perms (pH 4.5-7.0) are gentler and produce softer curls, not ideal for resistant hair.
Alkaline Perms (Cold Waves)
Permanent waves with a high pH (9.0-9.6) that process without heat, ideal for creating strong, firm curls on resistant hair.
- Main reducing agent is ammonium thioglycolate (ATG)
- Process quickly at room temperature
- Not recommended for porous or damaged hair
Memory trick: Alkaline is Strong for Resistant Hair, Acid is Gentle for Fragile Hair.