Maryland Barber State Practice Exam

The primary ingredient in most hair relaxers is sodium hydroxide. This compound serves as a strong alkali agent that breaks down the protein structure in the hair, allowing the hair to be straightened. Sodium hydroxide, also known as lye, is effective in altering the hair's natural texture by weakening the disulfide bonds, which provide hair with its natural curl or wave. In the context of hair relaxers, sodium hydroxide is especially favored for its potency and ability to deliver significant straightening results, making it a common choice in professional hair treatment products. Understanding this ingredient's role is crucial, especially for professionals who must be aware of its strength and the appropriate usage to avoid damage to the hair and scalp.