Copper Oxide Black

1KG COPPER OXIDE (BLACK)

Part #MCOB3

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CuO.  2% added to most glazes produces a clear green. In alkaline glazes the colour shifts to turquoise blue.  At 5% or more, metallic surfaces develop. Fired in a reduction atmosphere, red colours are achieved with ½% or less. To substitute for copper carbonate, use 71% of the recipe requirement. 

Note: Glazes become increasingly susceptible to food acid attack as copper oxide levels increase.