Efflux viscosimeter (flow cup viscosimeter) to determine the viscosity of fluids such as lacquers, paints, resins and liquids of similar viscosity. The liquid is filled in a conical cup with a defined nozzle at the bottom. Viscosity can be determined by means of the cup volume, nozzle diameter and the measured efflux time of the fluid. The test method is described under ASTM D 1200:1994, ISO 2431 and DIN 53211 (in October 1996 this standard was cancelled).