Can you make a black-burning stoneware using black iron oxide?

Monday 15th May 2017

Iron oxide has been added to a buff burning stoneware clay and samples fired at cone 6. They contain black iron oxide (10%, 5% and 2.5%). Even at 2.5% the raw pugged body is very black and messy to work with. Did they fire black? Or even dark grey? No. We have also tried 20% (mix of black and yellow iron) and the fired color is still dark red. Some form of manganese is needed to get an affordable black burning clay.

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Iron Oxide Black, Mug made from a cone 6 black-burning stoneware body

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