Texas Cosmetology Operator Written ExamHair Care ServicesMedium
A client has fine, delicate hair and desires a permanent wave that will create soft, natural-looking waves without causing damage. Which type of perm is best suited for this hair type and desired outcome?
- AAlkaline perm
- BCold wave
- CExothermic perm
- DTrue acid perm
Show answer & explanationAnswer & explanation
Correct answer: D. True acid perm
True acid perms have a lower pH (4.5-7.0) and are gentler on delicate hair, creating softer, more natural-looking waves. They typically require heat to process.
Why the other options are wrong
- A. Alkaline perms are too strong for fine, delicate hair and would likely cause damage.
- B. Cold wave is another term for alkaline perm, which is too strong for delicate hair.
- C. Exothermic perms generate their own heat and can be strong, not ideal for delicate hair unless specifically formulated gently.
True Acid Perms
Permanent wave solutions with a low pH (4.5-7.0), typically containing glyceryl monothioglycolate, that require external heat to process and are ideal for delicate, fine, or damaged hair to create soft, natural-looking waves.
- pH range: 4.5-7.0
- Main ingredient: Glyceryl monothioglycolate (GMTG)
- Requires external heat (hood dryer)
- Creates soft, natural-looking waves
- Suitable for delicate, fine, or damaged hair
Memory trick: Acid is 'A' for 'อ่อนโยน' (gentle in Thai), perfect for delicate hair.