BS EN ISO 2884-1: 2006 Coatings and varnishes for the determination of viscosity with rotational viscometer, cone and plate Viscometers for high shear rate operation The standard specifies the method for the determination of viscosity of coatings and varnishes under high shear rate conditions using cone and plate rotational viscometers. This method is suitable for the measurement of liquid materials with high shear rates and enables accurate assessment of the flow characteristics of coatings and varnishes during the Spreader process. The standard describes in detail the test equipment, operating conditions, data processing and calculation methods to ensure the accuracy and repeatability of test results. The measurement at high shear rate can reflect the performance of coatings in practical applications, especially in Spreader and levelling processes, and is widely used in the research and development, quality control and production monitoring of coatings and varnishes.