The viscosity tester type Lehmann is designed to determine the viscosity of glazing and clay slips. The time is measured that a defined amount of test material needs to run through a nozzle with a specific cross section into a volumetric flask. Subsequently the viscosity value can be determined comparing the time with such a slip of known consistency needs.
✓ High repeatability
✓ High accuracy
✓ Simple technique and handling
✓ Simple and quick measuring procedure (advantageous for test series and quality control)