BS EN ISO 2884-2: 2006 Coatings and varnishes - Determination of viscosity by rotational viscometer, disc or spherical Viscometer operating at a specified rate - The standard specifies the method for measuring the viscosity of coatings and varnishes using rotational viscometers. The standard applies to the measurement of rheological properties of liquid coatings or varnishes using disc or spherical Viscometers at a specified swirl/spin rate. The processing performance, Spreader and final application effect can be assessed by measuring the viscosity of the sample under specific conditions. The standard describes in detail the test equipment, operation procedures, data processing and calculation methods to ensure the conformity and repeatability of the test results. This method is widely used in Coatings and varnishes quality control, R & D and production monitoring to help optimize formulation and improve product performance.