New York State Barber Practice Exam 2025 - Free Barber Licensing Practice Questions and Study Guide

The key ingredients typically found in a relaxer are lye or no-lye chemicals. Relaxers are specifically formulated to alter the natural texture of hair, primarily to straighten it. The active ingredients in these relaxers break down the disulfide bonds in the hair's keratin structure, which is essential for the straightening process.

Lye relaxers contain sodium hydroxide as the active ingredient, which is highly effective but can be harsh on the hair and scalp if not used correctly. On the other hand, no-lye relaxers often use calcium thioglycolate or similar compounds that are gentler on the hair and usually come in a kit that includes a separate neutralizing agent.

Understanding the role of these ingredients is critical for anyone working in the barbering field, as it helps in selecting the appropriate products for clients based on their hair type and desired results. Knowledge of these ingredients also informs the barber about potential sensitivities and necessary precautions in the application process.