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Cupel,Fire Assay Crucible,Gold Melting Crucible,Crucibles For Melting Metal,Melting Crucible,Graphite Crucible,Silicon Carbide Crucible,Alumina Ceramic Disc,Ceramic Disc

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Magnesia cupels

Discover our magnesia cupels, 6A,7A,8A,9A cupels all available from stock. used for smelting and assaying.

Magnesia cupels are a porous refractory for absorbing lead oxide when ash blows lead buckle. The main component of magnesia is magnesium oxide, which is a very good refractory and can resist the erosion of alkaline flux.