Measuring method of wet film thickness: Thickness Wheel and Wet Film Comb

1. Introduction

Accurate measurement of wet film thickness plays a key role in Coating construction and quality control. Measuring methods can help ensure Coating mass and performance. This article will introduce two main wet film thickness Measuring methods: Thickness Wheel and Wet Film Comb.

2. Thickness Wheel wet film thickness measurement

2.1 Testing principle

Thickness Wheel wet film thickness measurement method uses three coaxial wheels, in which the middle wheel is eccentric with the outer two wheels, and the outer wheel is scaled to indicate the reading of different gaps.

2.2 Instruments and equipment

The QUL Thickness Wheel is a commonly used instrument with a test range of 0 to 150 microns (μm).

2.3 Operation points

In operation, press the Thickness Wheel vertically against the surface of the wet-film under test and roll from the maximum reading to the zero point. The first point where the wet-film contacts the middle eccentric is the wet film thickness.

2.4 Presentation of results

Wet film thickness is expressed in micrometers (μm).

3. Wet Film Comb wet film thickness measurement

3.1 Testing principle

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

3.2 Equipment

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

3.3 Operation points

In operation, the Wet Film Comb is pressed vertically against the wet-film surface under test, part of the teeth will be wetted, and the wet film thickness is the reading between the last wet tooth and the next unwetted tooth.

3.4 Presentation of results

Wet film thickness is expressed in micrometers (μm).

4. Application and meaning

Accurate measurement of wet film thickness plays an important role in Coating construction:

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

Film performance: wet film thickness directly affects film performance, such as hiding power, weathering resistance, etc. Accurate measurement helps to ensure the stability of film performance.

5. Conclusion

Accurate measurement of wet film thickness is crucial for Coating construction and quality control. By selecting suitable instruments and correct operation methods, the accuracy of wet film thickness can be ensured, thereby ensuring the mass and performance of Coating construction and contributing to the development of the Coating industry.