Post #691643 by Badd Tiki on Tue, Aug 27, 2013 9:10 AM

Have you tried firing one without glaze?

Glaze and clay need to be matched well for same shrinkage. The only way to say it's the clay's fault is a full fire without glaze. If it still cracks you need to fix clay (probably slower firing, etc..)

If not then you need to work on the glaze, or try something else.

Good luck!