Thickness gauge operation methods and precautions
Wet film thickness gauge, also called wet film comb, thickness gauge, wet film card, and wet film thickness gauge, is a tool for measuring the coating thickness of various coatings such as paints and varnishes during construction. Immediately after the application of various coatings, place the wet film thickness gauge stably and vertically on the flat workpiece coating surface. Coating thickness can be measured immediately.
Wet film thickness gauge is a tool for measuring the thickness of paint, varnish and other coatings during construction. Immediately after the application of various coatings, place the wet film thickness gauge stably and vertically on the flat workpiece coating surface. Coating thickness can be measured immediately.
How to operate:
1. Apply the paint on a suitable hardness flat plate (steel substrate). The area of the test plate must be large enough so that the distance between the paint film thickness measurement point and either side of the test plate is at least 25mm. Measure the wet film immediately after coating. thickness.
2. Fix the test panel on a suitable horizontal basis so that the test panel will not move or jump during the process of measuring the paint film. Place the instrument on the wet film with the thickness to be measured so that the minimum reading is at the top. The maximum gap between the eccentric wheel of the instrument and the wet film is just above the wet film. Then roll it forward for half a turn (180°) and repeat the roll for half a turn (180°) in the opposite direction before moving. Check the center rim of the instrument and the surface of the wet film. At the first position of contact, the reading is taken and averaged into one reading.
3. If the topcoat contains a volatile solvent or has a low solids content, it is best to take at least one more separate reading on the freshly applied coating and calculate the average of these separate readings.
Precautions:
1. After applying paint on a hard flat test panel in the laboratory or on the surface of the workpiece to be coated on site, the thickness of the wet paint film should be measured as soon as possible to reduce paint film damage caused by solvent evaporation. Thinning phenomenon.
2. After use, the instrument should be wiped clean and placed in a dry place.
3. When not in use for a long time, the instrument should be coated with oil for anti-rust treatment.
