Alumina Calcined is an intermediate oxide used to stabilize fluxes and glass formers that compose glazes affecting mattness and briliance. Adds strength and prevents devitrification. It is also known as Alumina Oxide and Calcined Alumina. Lack of alumina in glazes can result in glazes being soft and vulnerable to degradation from culinar acids. Calcined and ground to 325 mesh.

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