These paint and related coating standards help paint manufacturers and end-users in the appropriate testing and application procedures for the coating of their concern. While simple viscosity measurements are often used to check for and preempt coating defects, they can misrepresent underlining causes. Guides are also provided for the proper methods of applying these coatings, which also include enamels, varnishes, electroplatings, pigments, and solvents. Coating Defects: How Rheology Can Help Rheology and surface tension plays a key part in the formation and prevention of coating defects. When the solid stream breaks (indicating air passing through orifice), stop the watch. Raise the cup from the material and start the stopwatch, keep your eyes on the flow. Prepare (mix, strain,) the material to be tested. ASTM Paint Standards and Related Coating Standards (part 4)ĪSTM's paint and related coating standards are instrumental in specifying and evaluating the physical and chemical properties of various paints and coatings that are applied to certain bulk materials to improve their surface properties. How to Measure Paint Viscosity for Spraying.
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