This standard provides a general method for determining the consistency of thick coatings, fillers, and other viscous products. The core principle is as follows: a fixed volume of the sample (typically 20 milliliters) is placed between two glass plates, and a standard weight of specified mass is applied to the upper surface. After a certain period, the diameter of the circular spread formed by the sample under pressure is measured. This diameter indicates the consistency of the product. The method is simple to operate and yields intuitive results, requiring the use of a specialized thick coating/filler consistency tester (also known as a QCT-type tester) to complete the measurement. The instrument typically includes components such as a standard syringe, a glass plate engraved with concentric circles, and weights of specified mass.