How is viscosity defined?

Viscosity is defined as the thickness or resistance to flow of a liquid. It describes how easily a fluid can move or pour. In the context of esthetics, it can pertain to the texture and consistency of products used in skin care treatments, such as creams, lotions, and serums. A product with high viscosity is thick and flows slowly, while a low viscosity product is thinner and flows easily. Understanding viscosity is crucial when selecting products for different skin types and conditions, as it can affect the application and efficacy of treatments. For instance, thicker products may be better for dry skin, while lighter, more fluid products may be more suitable for oily or acne-prone skin.