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Equivalent Volumes and Weights
- Richard Burkett
The following is a *VERY* approximate table of conversions from volume measurements (teaspoons, Tablespoons, cups) to weigth in grams. Use this chart to make quick approximate color tests, glaze alterations, etc. to small amounts of glaze before mixing more exacting batches.
100 grams of dry glaze when mixed with enough water to make a typical dipping/pouring/brushing consistency will measure about 1/2 cup.
NOTE: As the quantities below are VERY APPROXIMATE, further testing with carefully weighed test batches is strongly advised. Materials were measured by scooping up the material with a common measuring spoon (like those used in cooking) and leveling the top with a knife. Care was taken not to pack the materials into the measuring spoon, but some variation is to be expected when using this method.
Material - amount> 1/4 t. 1/2 t. 1 tsp. 1 T. 1/4 c. 1/2 c. 1 cup #6 Tile Clay 0.6 1.2 2.3 7 28 56 112 grams Albany Slip 1.0 2.0 4 12 48 96 192 Alumina Hydrate 1.3 2.7 5.3 16 64 128 256 Ball Clay 0.8 1.5 3 9 36 72 144 Barnard Clay 1.0 2.0 4 12 48 96 192 Bentonite 1.0 2.0 4 12 48 96 192 Bone ash 0.7 1.3 2.7 8 32 64 128 Borax 1.0 2.0 4 12 48 96 192 Calcined Kaolin 0.4 0.8 1.7 5 20 40 80 Chrome Oxide 1.4 2.8 5.7 17 68 136 272 Cobalt Carbonate 0.9 1.8 3.7 11 44 88 176 Cobalt Oxide 1.8 3.7 7.3 22 88 176 352 Copper Carbonate 0.8 1.7 3.3 10 40 80 160 Copper Oxide-Black 2.8 5.7 11.3 34 136 272 544 Cornwall Stone 1.0 2.0 4 12 48 96 192 Cryolite 1.5 3.0 6 18 72 144 288 Custer Feldspar 1.2 2.3 4.7 14 56 112 224 Dolomite 1.8 3.5 7.0 21 84 168 336 EPK 0.8 1.5 3.0 9 36 72 144 Feldspar - Potash 1.2 2.3 4.7 14 56 112 224 Feldspar - Soda 1.0 2.0 4 12 48 96 192 Flint 1.3 2.7 5.3 16 64 128 256 Fluorspar 2.0 4.0 8 24 96 192 384 Frit 3110 1.1 2.2 4.3 13 52 104 208 Frit P-25 1.0 2.0 4 12 48 96 192 Frit P-54 1.0 2.0 4 12 48 96 192 Gerstley Borate 1.0 2.0 4.0 12 48 96 192 Iron Oxide-Black 0.8 1.7 3.3 10 40 80 160 Iron Oxide-Red 1.2 2.5 5 15 60 120 240 Kaolin, China clay 0.8 1.5 3 9 36 72 144 Lithium Carbonate 1.2 2.3 4.7 14 56 112 224 Magnesium Carbonate 0.2 0.5 1 3 12 24 48 Manganese Carbonate 1.6 3.2 6.3 19 76 152 304 Manganese Dioxide 1.7 3.3 6.7 20 80 160 320 NC-4 Feldspar 1.0 2.0 4 12 48 96 192 Nepheline syenite 1.0 2.0 4 12 48 96 192 Nickel Carbonate 0.6 1.2 2.3 7 28 56 112 Nickel Oxide 2.8 5.7 11.3 34 136 272 544 PV clay 0.8 1.7 3.3 10 40 80 160 Petalite 1.1 2.2 4.3 13 52 104 208 Rutile 1.8 3.5 7 21 84 168 336 Rutile-granular 3.5 7 14 42 168 336 672 Soda ash 1.6 3.2 6.3 19 76 152 304 Spodumene 1.3 2.7 5.3 16 64 128 256 Talc 0.9 1.8 3.7 11 44 88 176 Tin Oxide 0.8 1.7 3.3 10 40 80 160 Titanium Dioxide 1.8 3.7 7.3 22 88 176 352 Whiting 1.2 2.5 5 15 60 120 240 Wollastonite 1.2 2.3 4.7 14 56 112 224 Yellow Ochre 0.4 0.8 1.7 5 20 40 80 Zinc Oxide 1.1 2.2 4.3 13 52 104 208 Zircopax 1.4 2.8 5.7 17 68 136 272
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