The test tiles seemed to turn out pretty well, but the glaze on this test mug didn't see to do as well. The mug is made from a white cone 6 stoneware, where as the test tiles are buff stoneware coated with white slip. I'll need to test this glaze further to see if I can isolate why the mug bubbled so badly and the tiles didn't.
Something to working on tomorrow I guess. Have a great week.
4 comments:
I love the bubbling effect!
I have used white stoneware for about ten years. When I first started firing my own kiln I was having these same bubble issues. After lots and lots of research I found a great article on digital fires website about organics gassing out and causing bubbles. I changed my bisque cycle, heated very slowly around 1100 degrees to let the organic materials burn off, and had no more issues.
Your bubbles look exactly like what I had going on. Just a thought...... I'm certainly no expert but I did a LOT of reading on this subject when I couldn't figure out what was happening.
I concur with Tracey. We were using a turquoise glaze at Mudfire, it looked great in reduction but bubbled in the electric kilns. Changing the firing schedule as Tracey suggested made a huge difference, the glaze is now gorgeous and perfect.
Thanks Tracey & Lori. I'll give that a try. Be well.
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