The DS/ISO 1524 standard specifies the determination method of fineness of grind in Paints, varnish and Printing inks. Fineness of grind refers to the average particle size and dispersion state of pigment particles in Coatings and inks, which directly affects the performance, Appearance and use effect of Coatings. The standard helps producers determine the quality control of products and the Stability of production processes by measuring fineness of grind, ensuring the Spreader effect and Color uniformity of the final product. The use of this method can improve the production efficiency and mass of products, while providing reliable test data for the development of New materials. This test is important to ensure mass and application performance of coatings and inks.