Missouri Barber Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The process that is used to straighten curly hair is known as chemical relaxation. Chemical relaxers work by breaking down the protein bonds in the hair shaft that define curl patterns. This process allows the hair to be reshaped into a straighter form. Once these bonds are broken, the hair can be manipulated and then set in its new straightened shape.

Chemical relaxers utilize specific active ingredients, such as sodium hydroxide or ammonium thioglycolate, to effectively alter the structure of the hair. The relaxed state can last for several weeks and often requires touch-ups as new growth appears, allowing the stylist to maintain the straightened look.

The other options do not serve the purpose of straightening hair. Hair dye is used for coloring, while permanent waves create curls rather than eliminate them. Hair conditioning focuses on moisturizing and improving the overall health of the hair, not altering its structural form. Therefore, chemical relaxers are the specific agents designed for the purpose of straightening curly hair.