What is the pH scale used to measure?

The pH scale is specifically designed to measure the acidity or alkalinity of a substance. It ranges from 0 to 14, with a pH of 7 being considered neutral. A pH value lower than 7 indicates acidity, while a value greater than 7 indicates alkalinity. This scale is essential in various fields, including chemistry, biology, and esthetics, as it helps professionals understand the chemical properties of products and their potential effects on skin and hair.

For example, in esthetics, knowing the pH of skincare products can influence their selection and application on different skin types, ensuring that they maintain the skin's natural balance and do not lead to irritation or other adverse effects. Understanding pH is crucial for effective skincare treatments, making it a vital concept in the study of esthetics.