National Occupational Competency Testing Institute (NOCTI) Cosmetology Practice Exam

What is used to restore and rebound disulfide bonds in chemical permanent waving?

1. Neutralizing lotion

2. Softening lotion

3. Hydrating lotion

4. Acidic toner

The correct answer is: Neutralizing lotion

Neutralizing lotion is essential in the process of restoring and rebounding disulfide bonds in chemical permanent waving. During the perming process, the hair is subjected to a chemical solution that breaks down the disulfide bonds, allowing the hair to take on a new shape. After the desired shape is achieved, a neutralizing lotion is applied to the hair. This lotion contains oxidizing agents that work to rebuild and restore the broken disulfide bonds, effectively setting the new shape of the hair. The role of neutralizing lotion is crucial because without it, the hair would not hold the new style effectively. It not only solidifies the new curl but also helps to reduce the potential damage from the perming solution. The balancing act between the breaking and reforming of disulfide bonds is what ultimately gives the hair its permanent shape, making neutralizing lotion a fundamental component of the perming process. Other options like softening lotion, hydrating lotion, and acidic toner do not have the specific purpose of restoring disulfide bonds after the perming process. A softening lotion generally helps to relax hair textures or facilitate easier styling and combing, while hydrating lotion is typically meant for moisture retention in the hair. An acidic toner is