Glaze Hydrometer

Product Description

Baumé Glaze Hydrometer

A glaze hydrometer (thickness tester) measures the specific gravity of a glaze, to help standardize the thickness of a glaze from one batch to the next. If you mix your own glazes from recipes or purchased powder, hydrometers can save a lot of misery from glazes too thick or thin.

• Glass casing with weighted bulb


• Baumé 15c scale reading


• Approx. 125mm long


• The Hydrometer is a useful tool in achieving the ideal consistency of glaze and slip.


• Invaluable to enable easy repetition of optimum glaze consistency from one batch to another.


• To use, wet the hydrometer and gently place, bulb end first, in to the glaze slop or clay slip where it will float like a fishing float and the scale can be read.  

Approximate Ranges (for guidance only):

• Dipping or pouring colour glaze: 55 (specific gravity ~1.61)


• Dipping or pouring clear glaze: 46-47 (specific gravity ~1.46 to 1.48)


• Spraying glazes: 60 (specific gravity ~1.71)


• Brushing glazes: 60-65 (specific gravity ~1.71 to 1.81)

Link for useful info on Specific Gravity 

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