West Virginia Barber Practice Exam

What effect does acid pH shampoo have on the hair?

1. It creates frizz

2. It helps close the cuticle, adding shine

3. It strips color

4. It makes hair oily

The correct answer is: It helps close the cuticle, adding shine

An acid pH shampoo typically has a pH level between 4.5 and 6.0, which is slightly acidic. The acid helps to close the cuticle, the outermost layer of the hair, which can enhance the overall appearance and health of the hair. When the cuticle is closed, it lies flat against the hair shaft, creating a smoother surface that reflects light more effectively, resulting in increased shine. Additionally, a closed cuticle reduces porosity, meaning the hair is less likely to absorb excess moisture or environmental pollutants, which can also contribute to the hair looking healthier and shinier. This property of acid pH shampoos is beneficial, especially for those with color-treated hair, as it helps preserve color and maintain the integrity of the hair. The other options do not accurately describe the effects of acid pH shampoo. For example, creating frizz or stripping color is typically associated with more alkaline products, and making hair oily does not correlate with the function of an acid pH shampoo.