"KS A0531-1993 Viscosity Measuring method" is a liquid viscosity Measuring method standard formulated by the Korean Industrial Standard (KS). The standard specifies a variety of viscosity Measuring methods, including capillary tubing Viscosity meter, falling ball viscometer method, swirl/spin Viscosity meter method, etc., suitable for the viscosity determination of newtonian fluid and some non-newtonian fluids. The standard provides standardized viscosity measurement guidance for industrial production and laboratory research to ensure the accuracy and conformity of measurement results. Its content covers Measurement principles, instrument selection, operation steps and result calculation, and is widely used in chemical, pharmaceutical, food and other industries.