How is viscosity defined in paint technology?

Viscosity is defined as the measure of a fluid's resistance to flow. In the context of paint technology, it describes how easily paint can be applied and how it behaves during application. A higher viscosity indicates a thicker paint that flows less readily, while a lower viscosity indicates a thinner paint that flows more easily. This property is crucial in paint formulation and application as it affects leveling, brushability, and the overall finish of the paint once applied.

Understanding viscosity helps manufacturers adjust formulations to provide desired application characteristics. For example, paints used for spray applications may have lower viscosity to ensure proper atomization, while paints meant for brush application might be formulated with higher viscosity to allow for better control and coverage. Therefore, defining viscosity as "resistance to flow" is essential in ensuring the right properties for effective use in the painting process.