In a recent glaze firing at our community studio, something exploded and we wonder whether it might have been one or more of the bisqued "cookies" placed under a couple of pieces in case of possible glaze drips. These cookies have been used in multiple glaze firings - let's say perhaps 4 - 6, not sure. No thrown / glazed pieces blew up (as far as we know), though some were damaged, of course, from the bisque fragments embedded in them. Someone suggested clay fatigue as a possibility, saying that on occasion a ceramic baking dish used for some years can explode in the oven (and wouldn't THAT be a mess!).

Can anyone offer ideas about this? Thanks.

Views: 630

Reply to This

Replies to This Discussion


Neil Estrick said:

That Dogwood article is interesting. I think just opposite is actually true in regards to salt migration during fast drying. The slower it dries, the more likely you are to get salt migrating to the surface. We see this in carbon trap Shino glazes that have soda ash in them. If you want the slat to migrate to the surface for optimal carbon trapping, you have to dry them slowly, or at least at normal room temperature rates. Drying them in the kiln will not allow the salt to come to the surface.

If something blew up in the kiln, it was wet. Pieces that are fired too many times simply crack. They don't explode.

Reply to Discussion



  • Add Videos
  • View All

Use These Links to Support Us

Low cost flat lapping disc can be used on you potters wheel if you, drill bat pin holes in it, and provide a trickle of water to cool it. At, 120 grit for aggressive material removal. Click the image to purchase 

Members have had great things to say about John Britt's new book, Mid-Range Glazes. Click the image to buy from

Purchase Glazes Cone 6 by Michael Bailey, The Potters Book of Glaze Recipes by Emmanuel Cooper, or Making Marks by Robin Hopper, all available at amazon.comMastering Cone 6 Glazes by John Hesselberth & Ron Roy is now out of print.

Harbor Freight is a great place to find unbeatable prices for better HVLP spray guns with stainless steel parts and serviceable economy models, as well as detail guns, all tested by our members for spraying glazes, as well as compressors to power the guns. As yet no one has tested and commented on the remarkably inexpensive air brushes at harbor freight.

The critter siphon gun is a spray alternative that is well liked by some of our members, and is available at amazon.

Amazon is also a competitive source for photo light tents for shooting professional quality pictures of your work. They also have the EZ Cube brand favored by several of our members. You might also want to purchase the book Photographing Arts, Crafts and Collectibles . . .

If you are up to creating videos of your work or techniques you might want to invest in a flip video camera

Following are a few scales useful for potters. Your final price could be less or more - things change.

American Weigh Black Blade Digital Scale, 1000g X 0.1g $11.08 

For the non-digitally inclined the old standard Ohaus Triple Pro Mechanical Triple Beam Balance, 2610g x 0.1g, with Tare $169.00

And finally a low cost clone of the OHaus. The Adam Equipment TBB2610T Triple Beam Mechanical Balance With Tare Beam $99.62

ebay is a great alternative for many tools and the equipment used in the ceramics studio - kilns, wheels, extruders, slab rollers are often listed there both new and used.

Tips for Members

If you just want to spout off, it is best accomplished as a blog posting. If you want to get more guidance and ideas from other members, ask a question as a new discussion topic. In the upper right corner of the lists for both types of posting, you will find an "+Add " button. Clicking it will open an editor where you create your posting. 4/16/2014

© 2021   Created by George Lewter.   Powered by

Badges  |  Report an Issue  |  Terms of Service