For many applications, we do not need to know the absolute viscosity of the paints system, but usually only need to know a parameter containing the relative grade and corresponding evaluation. Measuring the outflow time of a fluid in seconds has proven to be a practical method of measuring it with various designs of Flow Cups. These Flow Cups are designed to meet certain international/national standards. Can hold a certain volume of liquid through an filtrate nozzle, the reproducibility of this Measuring method depends on:
1. The accuracy of the Flow Cup size
2. Constant temperature during measurement
3. Newtonian flow characteristics of fluid
