Which two types of hair relaxers?

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Multiple Choice

Which two types of hair relaxers?

Explanation:
Hair relaxers fall into two main families based on the reducing agent used: hydroxide-based relaxers and thioglycolate (thio) relaxers. The two types described in exams are those two families—sodium hydroxide–based relaxers and thioglycolate–based relaxers. Sodium hydroxide is the classic lye relaxer, while thioglycolate-based products use thioglycolate as the reducing agent. This distinction matters because the chemistry, processing times, and neutralization requirements differ between the two groups. The other options mix chemicals that aren’t used together as the two primary relaxer types (for example, potassium hydroxide isn’t a standard salon relaxer, and calcium hydroxide isn’t used for relaxing).

Hair relaxers fall into two main families based on the reducing agent used: hydroxide-based relaxers and thioglycolate (thio) relaxers. The two types described in exams are those two families—sodium hydroxide–based relaxers and thioglycolate–based relaxers. Sodium hydroxide is the classic lye relaxer, while thioglycolate-based products use thioglycolate as the reducing agent. This distinction matters because the chemistry, processing times, and neutralization requirements differ between the two groups. The other options mix chemicals that aren’t used together as the two primary relaxer types (for example, potassium hydroxide isn’t a standard salon relaxer, and calcium hydroxide isn’t used for relaxing).

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