The BS EN ISO 1524-2020 standard specifies methods for determining the fineness of grinding in Coatings, varnishes and Printing inks. The standard is suitable for assessing the dispersion of particles or coacervations in Coatings and inks, tested using a fineness of grinding instrument. The standard describes in detail the equipment requirements, the operation steps and the way the results are evaluated, ensuring the accuracy and conformity of the determination process. The determination of fineness of grinding is an important part of quality control and can be used to evaluate the performance and suitability of products, helping to optimize the production process. This standard provides a common technical specification for the coatings and inks industry for fineness analysis needs in research, production, and inspection.