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Hi everyone, Hobbyist ceramist with a few years of experience here, but not so much glaze chemistry knowledge. I make work at a studio in Germany since a few years and since the summer, we noticed a lot of new issues with various glazes used at the studio. Nothing seems to have changed a priory with the way we do things. We fire with 2 different Rhode ecotop kilns at 1220 celcius. All ours work is made using a white stoneware clay from one distributor. We order commercial glazes from the same distributor and a few other glazes from another one. We've been using the same glazes for yea
Me again! I recently posted a topic (here) about work cracking. A different issue (the absorption levels of the clay and possibly the use of a commercial liner glaze) was identified and so my focus was on fixing this and hopefully, in turn, my cracking problem would disappear. But it's back! After shock testing test pieces (freezer overnight and then boiling water), the image shows a hairline crack that wraps around at leats half the cylinder on the outside with smaller cracks coming off at right angles (highlighted with ink). The ink has been painted on to the gloss liner in the interior but
Hello all! I am a potter of several years but know that I still have a lifetime of learning to do. I have a very particular aesthetic I try to accomplish with my mugs-- essentially they are liner glazed interior with a thick coating of multiple glazes on the exterior. Many potters do this, amiright? I have been creating these intricate glazes myself for 3 years now, without issue. It seems like all of a sudden (last 4 months) I have had customers come to me saying that their piece has been fine during multiple uses, when all of a sudden they pour their hot liquid in, get a ping, and a horizont