![]() ![]() Simply, the higher the temperature of a coating, the less resistance there is to flow, and the lower the viscosity becomes. So What is the Problem with Viscosity?įirst of all, it MUST be understood that the viscosity of aqueous coatings is dependent upon temperature. Commonly used Zahn-type cups should only be used as a comparative tool to evaluate or adjust similar coatings, but should not be considered a viscometer. Other simpler, less expensive devices, called orifice viscometer cups, numbered according to hole size, are also used. The viscosity of Cork manufactured aqueous coatings is measured at 70 degrees F utilizing a Brookfield viscometer which yields an accurate, reproducible measurement in centipoise (cps). When we use coatings, we need to understand viscosity, because it is key to accurate application, and a finished coated product that achieves the target design. Coating viscosity is the property of a fluid that causes it not to flow easily because of the resistance of its molecules. Viscosity tells us how thick or thin a liquid is. Understanding and Testing of Viscosity in Coatings
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