Tennessee Cosmetology Practice Exam

In a chemical perm, the waving lotion plays a crucial role in altering the structure of the hair to create curls or waves. It specifically functions by breaking down the disulfide bonds in the hair. Disulfide bonds are strong chemical bonds that help maintain the hair's natural shape and strength. By breaking these bonds, the waving lotion allows the hair to be reshaped into a new configuration, which is then set in place by the neutralizer after the hair has been wrapped around the perm rods.

This process is essential for achieving the desired curl pattern, as it creates the necessary flexibility within the hair strands to form curls when the hair is subsequently neutralized. Understanding this fundamental role of the waving lotion helps clarify why it is a critical component in the perming process.