Hi, I've a problem. I made a piece with clay stoneware. When it dries = OK. When biscfire = OK. But when firing after glazing à 1220°C, the piece collapse, see pictures. Maybe the temperature is too high. But it's a long time I'm working this clay without problem. Whether I use earthware the piece doesn't collapse. But I want to use my glaze and I don't want to by glaze for earthware. What could I do ?
Thanks for advice
Sean
Collapsing.pdf