Copper Carbonate produces an apple green colour in glazes when fired under neutral and oxidising conditions, apart from in alkaline glazes when a turquoise blue is obtained. A copper red colour known as “sang-de-bueuf” can be produced sometimes in reducing conditions.
When added to low-solubility leaded glazes, copper causes the solubility of the lead to be greatly increased, and so makes the glazes unsuitable for use in objects used for containing food or drink.
HARMFUL (Xn). Please read the safety information prior to purchase and use: