You must test before you use it, at any scale. Raw materials, mined or man-made, are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.
Molochite – Calcined Kaolin
An alumino silicate refractory which is the standard for investment casting shell moulds. With a calcined Mullite conversion of about 90%, Molochite is unrivaled by other calcined kaolins. You will not find a grog with similar Mullite conversion or purity.
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