studiosoda Posted January 3 Report Share Posted January 3 Hello everybody! Today I had a surprise when I opened the kiln and need help to figure out what went wrong. I made some dinner plates with this clay: Sibelco WMS2502 (stoneware clay). I used a △6 glaze that I found on glazy. I made some test tiles with the clay & glaze combo in a small oven in my studio and they looked perfect. When I fired the plates the first time it was a disaster. Basically the whole oven was underfired and the plates came out looking really matte and not finished. Also all other pieces with this particular glaze looked weird, some crawled and some clay completely couldn't handle this glaze. My studio fires to △6, but it seems like the oven is quite old and because it's so big it fires really unevenly and doesn't reach the right temperature. Some pieces came out okay that were on the top. So I thought I will fire the plates again to see if its the oven, but in a medium sized one, that seems to fire a little bit hotter . I fired a small underfired piece (little bowl) a second time and it came out perfectly. When I fired the plates the second time - △7 - they all came out broken, except one! -.- (See pictures) Now my problem is, that I have no idea where I went wrong. Is it the glaze/clay combination? Is it the the second firing? Is it because I only glaze them on one side? Could it be because some of it is recycled clay? Is the application too thick? I really appreciate any hints, as I'm a bit lost... Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.