Colorado Cosmetology Written Practice Exam

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Which type of relaxer is not typically categorized as a mainstream relaxer type?

Lye relaxer
Milk relaxer
No-lye relaxer
Thio relaxer

The correct answer is: Milk relaxer

The correct answer is B Milk relaxer. While all other options are commonly used relaxer types, milk relaxer is not a mainstream option. Lye relaxers use sodium hydroxide as the active ingredient while no-lye relaxers use potassium hydroxide, both of which are harsh chemicals that can cause damage to the hair and scalp. Thio relaxers, also known as ammonium thioglycolate relaxers, use thioglycolic acid and are typically used for curling or texturizing rather than straightening the hair. Milk relaxers, on the other hand, use milk protein as the active ingredient and are specifically designed for sensitive scalps. While they may not be as popular as the other relaxer types, they offer a gentler option for those with delicate hair and skin.