Texas Class A Barber Written ExamChemical ServicesMedium
A barber is preparing to apply a no-lye relaxer to a client's hair. What is the primary active ingredient typically found in no-lye relaxers?
- AGuanidine hydroxide
- BSodium hydroxide
- CLithium hydroxide
- DAmmonium thioglycolate
Show answer & explanationAnswer & explanation
Correct answer: A. Guanidine hydroxide
No-lye relaxers typically use guanidine hydroxide as their primary active ingredient, which is considered less irritating than sodium hydroxide (lye relaxers).
Why the other options are wrong
- B. Sodium hydroxide is the active ingredient in 'lye' relaxers, not 'no-lye' relaxers.
- C. Lithium hydroxide is another type of hydroxide relaxer, sometimes considered a 'no-lye' but less common than guanidine.
- D. Ammonium thioglycolate is used in thio relaxers and permanent waves, not no-lye relaxers.
No-Lye Relaxer Active Ingredient
No-lye relaxers primarily use guanidine hydroxide as their active ingredient, offering a milder alternative to lye relaxers.
- Less irritating to scalp than lye
- Requires mixing of two components
- Can be more drying to hair
Memory trick: No-lye has 'Guan' (one) ingredient, not 'Sodium' (two-part lye).