This is the easiest way to measure the specific gravity of a glaze if it is not in a container deep enough to float a hydrometer (or if it is too viscous to enable free movement). Just counterbalance the empty graduated cylinder to zero (you can buy these at amazon.com), fill it to the 100cc mark and the scale reading divided by 100 is the specific gravity. Be careful on cheap plastic graduated cylinders like this, check them with water and mark the true 100cc mark if needed. You could actually use any container, just fill it with water and mark the level, then fill to the same level with slurry and divide the slurry weight by water weight.
Pages that reference this post in the Digitalfire Reference Database:
Understanding the Deflocculation Process in Slip Casting, Specific gravity of a glaze using a scale and measuring cup, More problems measuring glaze specific gravity using a hydrometer , Deflocculation, Specific gravity, Rheology, Thixotropy
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