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Permeability
 | When developing a coating process, it is important to know the exact time it takes for the coating to dry or cure. For multicoated paint systems, having knowledge of the drying time enables the operator to know when any subsequent layers can be applied.
There are many stages involved in the coating drying time. Once a coating has been applied, it levels off under gravity, and, as the coating begins to cure, a thin dry film appears on the surface. The coating then continues to dry until; finally, it is totally cured. |
The Elcometer 5100 Payne Permeability Cups are made entirely from anodized aluminum and are used to determine the permeability of films of paints, varnish, plastic, cellophane, etc. The water evaporates or is absorbed and, after a certain time, the weight change relative to the film thickness is calculated, indicating the degree of permeability or permeance.
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