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Careful history taking is essential to diagnose copper poisoning in acutely ill patients.
By Edouard Bastarache
This glaze is 49% Wood Ash, 24% Soda Feldspar and 27% Ball Clay. 10 copper carbonate and 10 manganese dioxide are added to that. This beautiful sculpture was made by Dan Ingersoll, aesthetically this glaze is perfect for it. But there are two red flags here. Significant manganese and copper metal fumes are certain to be generated at cone 10 (they are seriously not healthy) so anyone using this must be very careful. But there is something much more serious - this glaze is being used on functional ware. Copper is well known to destabilize other metals in the fired glass. This 10:10 combination is a perfect storm for leaching heavy metal into food and drink. This is not an argument for the use of commercial glazes, it is one for common sense application of the concept of limit recipes.
Typecodes |
Article by Edouard Bastarache
Edouard Bastarache is a well known doctor that has written many articles on the subject of toxicity of ceramic materials and books on technical aspects of ceramics. He writes in both English and French. |
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Materials |
Copper Oxide Red
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Materials |
Copper Oxide Black
The purest source of CuO copper oxide pigment used in ceramic glazes. |
Materials |
Copper Carbonate
A source of CuO copper oxide used in ceramic glazes to produce a variety of colors (used only or with other colorants). |
Materials |
Copper Carbonate Basic
This form of copper carbonate is the article of commerce, a mixture of theoretical copper carbonate and copper hydroxide. |
Materials |
Copper Hydroxide
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Hazards |
Copper Oxide and Carbonate
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