If the coating is still wet...
Measuring:
Immediately after the surface coating of the substrate the Thickness Gauge is pressed into the still wet coating so the two external comb teeth fully rest on the substrate. Then the thickness gauge is removed again. The measuring range must be chosen so some teeth of the comb field are wet and some are not. Choose another measuring range where appropriate.
The thickness of the coating lies between the shortest still wet tooth and the neighboring no more wet tooth and can be calculated by averaging the thickness values imprinted next to the two teeth.
In accordance with the specifications of the standard the measurement should be repeated in same manner at least twice in order to get representative measured values.
After measurement, clean the wet film thickness gauge shortly in a suitable solvent.