Viscosity cups remain the most important quick and simple method to measure the consistency of fluids in the laboratory and in production. Viscosity Cups are, however only suitable for lower viscosities and not for highly viscous substances such as pastes etc. The most accurate results are achieved with fluids within the range complying with Newton’;s Law.
The general test process is described as follows:
- Level stands using spirit level
- Place cup in the stand or in temperature control vessel
- Close nozzle
- Fill with fluid
- Wipe off surplus material across the edge of the cup with a glass plate, and close cup with finger or glass plate.
- Open nozzle
- Pull off glass plate horizontally and simultaneously set stop watch in motion
- At the first break off in the fluid flow stop watch and note time.