Make a small cone shaped test piece from your 'new' clay body and mount it like a cone in a cone pack. include it in your next firing. If you are over firing the test piece should show signs of deforming. this is a good check out technique for suspect clays.
by 'cone shaped test piece' I mean a pinched piece of clay shaped like an large Orton cone or a large Orton stand-alone cone.
Magnolia Mud ResearchMember Since 28 May 2016
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