CLAYS AND RAW MATERIALS › Colouring Oxides and Opacifiers › Cobalt Oxide

The most powerful colouring oxide. This produces a deep blue or blue- black  colour in lead and leadless glazes and a vivid blue in alkaline glazes. It gives good colour variations when used in combination with other oxides.   1 - 1.5% for a deep blue.

Ref.COBO

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