Bisque Imports / Article - How to Test Viscosity for Clear Glazes
Article - How to Test Viscosity for Clear Glazes
How to Test Viscosity of Duncan Pure Brilliance Clear Glaze
Be sure to test the viscosity of your clear glaze before when opening a new batch and before each dipping session. Since some areas are more arid than others, you may find that checking the viscosity periodically during a dipping session is necessary for your environment.
1. Thoroughly mix the glaze.
2. Let bubbles rest before testing viscosity.
3. Submerge the Viscosity Cup (#TL497) into the dipping tank and fill with glaze.
4. As you lift cup from glaze, begin timing with a stopwatch. A stopwatch provides a more accurate count than a second hand on a clock.
5. Hold cup approximately 6" to 8" over the glaze
6. Stop timing when the steady stream of glaze begins to break.
7. Pure Brilliance viscosity range is 19-24 seconds with 20-23 seconds being ideal. A viscosity of 18-23 seconds is normal with other Duncan clear glazes.
8. Add small amounts of water 2-4 ounces of distilled water at a time, as needed.