What does pH measure in relation to cosmetology products?

The pH scale is a crucial concept in cosmetology because it quantifies the acidity or alkalinity of a substance, which is pivotal in formulating and applying hair and skin care products. The scale ranges from 0 to 14, with values below 7 indicating an acidic solution, values above 7 indicating an alkaline (or basic) solution, and a value of exactly 7 representing a neutral solution.

In cosmetology, understanding the pH of products helps professionals select the right products for different hair and skin types. For instance, acidic products can be beneficial in closing hair cuticles, which can enhance shine and manageability, while alkaline products can open the cuticles, making them ideal for deeply cleansing or coloring hair. Furthermore, the skin has a naturally acidic pH, and products that are too alkaline can disrupt its barrier, potentially leading to irritation or other issues.

The other options do not pertain to pH. Coloration relates to the visual aspect of products, temperature refers to heat measurement, and viscosity pertains to the thickness or flow of products. Hence, the proper measurement of pH plays a pivotal role in ensuring the efficacy and safety of cosmetic applications.