Utah Barber Practice Exam

The main ingredient in most hair relaxers is sodium hydroxide. This chemical is a strong alkali and is commonly used in hair relaxing products because it effectively breaks down the disulfide bonds in the hair's keratin structure. By altering these bonds, sodium hydroxide allows curly or wavy hair to be transformed into a straighter texture.

Sodium hydroxide works by swelling the hair shaft, making it more pliable and easier to manipulate into the desired straight style. Its potency is what enables it to deliver effective results, but it also requires careful handling to prevent damage to the hair and scalp.

Other ingredients like ammonium thioglycolate do have applications in hair treatments, particularly in perming, but they are not the primary agents in hair relaxers. Meanwhile, both calcium hydroxide and potassium hydroxide may be found in some formulations but are less common as the main active ingredient in relaxers compared to sodium hydroxide.