Which perm has a different reducing agent known as cystemine hydrochloride?

Which perm has a different reducing agent known as cystemine hydrochloride?

• A. Acid perms
• B. Alkaline perms
• C. Exothermic perms
• D. Low/no Thio perms

Answer: (D)

The idea being tested is how reducing agents in perms differ. Most perm formulas use thioglycolate-based reducing agents (like ammonium thioglycolate) to break and later reform disulfide bonds in the hair, which is what creates the curl when the hair is re-set and neutralized. A different reducing agent—cysteamine hydrochloride, often referred to as cysteamine HCl—is used specifically in low/no-thio perms. This category is designed to reduce odor and can behave differently from thioglycolate, hence it’s set apart from the standard thiol-based perms. So the perm type that uses a different reducing agent is the low/no-thio perm.

The idea being tested is how reducing agents in perms differ. Most perm formulas use thioglycolate-based reducing agents (like ammonium thioglycolate) to break and later reform disulfide bonds in the hair, which is what creates the curl when the hair is re-set and neutralized. A different reducing agent—cysteamine hydrochloride, often referred to as cysteamine HCl—is used specifically in low/no-thio perms. This category is designed to reduce odor and can behave differently from thioglycolate, hence it’s set apart from the standard thiol-based perms. So the perm type that uses a different reducing agent is the low/no-thio perm.