Measures the coating’s thickness immediately after the coating has been applied on the material.
For a particular side, the two ends of the edge are pushed into the coating until they are in contact with the substrate. Those ends act as the zero reference.
The Zip-Chem® Wet Film Thickness Gauge must be placed at a 90-degree angle to the coated material and must be completely contacting it.
Once the measuring gauge is taken out of the material, depth is determined by the biggest notch that can be seen in the coating and the smallest notch that cannot be seen in the coating.
For instance, if the largest notch that is observed is at 8 MILS and the smallest notch that is not observed is at 10 MILS, it can be said that the wet film thickness is at 8 to 10 MILS.
To achieve accurate measurements, the following must be observed:
- Wet film thickness must be measured immediately after the coating has been applied for coatings that cure
- The gauge must be used on a smooth, flat surface without irregularities
- Several measurements should be taken in series to get an average result
- The gauge should be cleaned with a soft cloth after use