1. The introduction
Accurate measurement of wet film thickness plays a key role in coating construction and quality control. Different measurement methods can help ensure the quality and performance of the paint. This article introduces two main wet film thickness measurement methods: comb round rules and rules.

2. Wheel gauge wet film thickness measurement method
2.1 Test principle

Round of wet film thickness gauge measuring method with three coaxial wheel, including the middle wheel and the lateral two eccentric wheel, wheel lateral scale, indicate different clearance of the readings.

2.2 Instruments and Equipment

QUL type gauge is a common instrument, test range of 0 ~ 150 microns (microns).

2.3 operating points

To operate, press the wheel gauge vertically on the surface of the wet film being tested and roll from the maximum reading to zero. The wet film thickness is the position where the wet film first contacts the middle eccentric wheel.

2.4 Result representation

Wet film thickness in microns (microns) said.

Wet film thickness measurement method: wheel gauge and comb gauge

3. The comb wet film thickness gauge measuring method
3.1 Test principle

The wet film thickness measurement method of the comb gauge adopts a series of comb teeth, the outer teeth at both ends are in the same horizontal plane, while the middle teeth have increasing different gaps from the horizontal plane, and different gaps correspond to different readings.

3.2 equipment

The commonly used instruments are SHG-100, SHG-200, SHG-700 and SHG-750, which are suitable for different test ranges.

3.3 Operation points

During operation, the comb gauge is pressed vertically on the surface of the wet film to be tested. Some teeth will be wetted. The thickness of the wet film is the reading between the last tooth that is wetted and the next tooth that is not wetted.

3.4 the results

Wet film thickness in microns (microns) said.

Wet film thickness measurement method: wheel gauge and comb gauge

4. Application and significance
Accurate measurement of wet film thickness plays an important role in coating construction:

Quality control: to ensure the wet film thickness of the coating construction meet the requirements, avoid excessive or insufficient coating construction.

Coating performance: Wet film thickness directly affects the performance of the coating, such as hiding power, weather resistance, etc. Accurate measurement helps to ensure the stability of the coating performance.

5. Conclusion
Accurate measurement of wet film thickness for the coating construction and quality control is very important. By selecting the appropriate instruments and the right operation method, can ensure the accuracy of wet film thickness, to ensure quality and performance in coating construction, contribute to the development of coating industry.