Cobalt Carbonate CoCO3 - for ceramics
Cobalt carbonate has a lower cobalt content than Cobalt oxide but is easier
to mix evenly and melts more easily. 1-3% Cobalt carbonate produces deep blues in leadless glazes, or a blue-black in lead glazes,
or a vivid blue in alkaline glazes. The presence of Magnesium gives a
more purple tint.
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