Michigan Cosmetology Licensing Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

The term "pH" in cosmetology stands for "Potential of Hydrogen." This measurement is crucial because it indicates the acidity or alkalinity of a substance on a scale ranging from 0 to 14, with 7 being neutral. In cosmetology, understanding pH is essential for various reasons.

For example, hair and skin have a natural pH level, usually ranging from 4.5 to 5.5, which is slightly acidic. Products that are too alkaline (higher pH) can disrupt the natural balance, potentially leading to dryness, damage, or irritation. Conversely, products that maintain or restore the appropriate pH level can help preserve the health of both skin and hair, enhancing their appearance and feel.

Additionally, the pH level influences how effective certain cosmetic products are, including hair color, perms, and relaxers. For instance, a product with a low pH can help close the hair cuticle and reduce frizz, whereas a high pH can open the cuticle for better penetration of the product. This understanding is vital for cosmetologists as they choose products tailored to their clients' specific needs.