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Six stroke rods with hemispherical contacts, installed on three independent sliding frames. Each channel can have its own set running time to test different samples separately. The rod is driven by a sliding frame and comes into contact with the new coating . Starting from one end, it moves longitudinally on the sample. The movement time can be measured by the scale on the edge of the channel, corresponding to the various drying stages of the observed trajectory. The coating is pre applied on glass strips with a width of 23mm and a length of 340mm, using a square preparer for coating. The principle of a drying time recorder is d on the mathematical formula: distance=velocity x time.

 

ISO 9117-4、ASTM D 5895