ABSTRACT
An understanding of the basic principles that describe and predict liquid flow and interfacial interactions is necessary for the effective formulation and the efficient application of coatings. The two primary sciences of liquid flow and solid-liquid interaction are rheology and surface chemistry. Rheology deals with the science of flow and deformation while surface chemistry deals with the science of wetting and dewetting. The key rheological property of coatings is viscosity, which is simply the resistance of a coating to flow, the ratio of shear stress to shear rate.
