Assertion: perm | /r/Synonym | acid
Facets:
Source sentences:
text: Some perms that are designed to be gentler use glyceryl monothioglycolate instead; these are called acid or acid-balanced perms, depending on the pH. Traditional relaxers use sodium hydroxide (lye), while no-lye relaxers contain other hydroxides such as calcium hydroxide, lithium hydroxide or potassium hydroxide.