How to measure viscosity with a viscometer

Viscosity is one of the most essential physical properties of industrial fluids, such as coatings, paints and adhesives.

Essentially, viscosity indicates a fluid’s resistance to deformation by shear or tensile stresses.

In other words, this property describes the friction between the fluid molecules causing opposition relative motion between fluid layers moving at different velocities. Viscosity can be a clue about how a fluid will behave under an applied force or its own weight.

The more viscous a fluid is, the “thicker” it appears to be.

For instance, oil or grease have higher viscosities than water and therefore appear thicker.

Dynamic viscosity

Oil, coatings, paint and adhesive manufacturers are often tasked with determining the optimum viscosity of their products for specific applications. (For more on this topic, see: Service Requirements & Environmental Factors for Coatings.)

Low viscosity fluids tend to flow more easily.

Therefore, having a coating with a viscosity that is too low can cause running and sagging. On the othe

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