The hard drying time refers to the time of Coating through drying after construction. In the actual drying time, the surface of Coating is no longer sticky, there are no more hooks and sticky dust, and the film has sufficient hardness and strength.
The hard drying time of Coating is affected by many factors, including Coating type, Coating thickness, construction conditions, etc. Usually, the hard drying time of Coating needs to be determined according to the specific construction conditions and Coating thickness.
To determine the hard drying time of the Coating, the following tests can be performed:
Nail scratch test: Gently scratch the surface of the Coating with your fingernails. If there are no more sinkages and traces on the surface of the coating, it means that the Coating has dried.
Tap test: Gently touch the Coating surface with your finger. If the coating surface is no longer sticky, it means that the Coating has dried.
Film hardness testing: Use a Hardness Tester to measure the hardness of Coating surface. If the coating hardness meets the standards specified by the Coating manufacturer, it means that the Coating has dried.
NBchao reminds you: After the Coating is dried on the surface, it needs to be completely cured, that is, the intermolecular cross-linking and chemical reaction inside the coating, in order to achieve the final performance. Therefore, the hard drying time of Coating is only an approximate time range, and the actual curing time may be longer.
