What does the term 'viscosity' relate to in a liquid?

Viscosity refers to the thickness or consistency of a liquid and describes how resistant that liquid is to flow. A high-viscosity liquid, like honey, flows more slowly than a low-viscosity liquid, like water. This characteristic is crucial in various applications, including cosmetics and the formulation of eyelash adhesives, where the viscosity can affect ease of application, drying time, and overall performance. Understanding viscosity helps lash technicians choose the right products based on how they need the adhesive to behave during the application process.

The other options do not accurately describe viscosity: it does not relate to the volume of the liquid, nor does it pertain to temperature stability or color. Each of these factors affects liquids in different ways, but they do not define the concept of viscosity.