Rhode Island Cosmetology and Barbering Practice Exam

Sodium relaxers, also known as lye relaxers, are not compatible with thio relaxers. Thio relaxers contain a different active ingredient called ammonium thioglycolate, which can cause adverse reactions when mixed with lye relaxers. It is important to always do a patch test and consult a professional before mixing any hair relaxers, as the combination of chemicals can be damaging to the hair and scalp. Option A, lye relaxers, is incorrect because sodium and lye relaxers are the same product. Option C, keratin treatments, is incorrect because they do not contain the same active ingredients as thio relaxers and therefore are not incompatible. Option D, no-lye relaxers, may seem like the correct answer as they do not contain lye, but they still use sodium hydroxide as the active ingredient and should not be mixed with thio relaxers.