What happens when a limestone clay mix is fired to cone 6?

Wednesday 21st April 2010

The top bar is a mix of calcium carbonate and a middle temperature stoneware clay (equal parts). On removal from the kiln it appears and behaves like a normal stoneware clay body, hard and strong. However, pour water on it and something incredible happens: in a couple of minutes it disintegrates (as it rehydrates). And generates lots of heat as it does so.

Pages that reference this post in the Digitalfire Reference Database:

Calcium Carbonate, Limestone, Calcination

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