Dave Earley Posted December 5, 2023 Report Share Posted December 5, 2023 I threw these bowls with clay from my back yard in Strongsville, Ohio. I first tried to use the clay as a slip with stain under an ash glaze. That didn't work. Then I fired a cube of the clay to cone 10. here are pictures. Hulk and Rae Reich 2 Quote Link to comment Share on other sites More sharing options...
Babs Posted December 5, 2023 Report Share Posted December 5, 2023 In the Clay and Glaze section of these firums there is a post right at the op or near it titled Wild Clay. @glazenerd is a great resource also. Throws pretty well! Rae Reich 1 Quote Link to comment Share on other sites More sharing options...
glazenerd Posted December 10, 2023 Report Share Posted December 10, 2023 Dave Fairly familiar with Ohio clay. Most everything you find will be iron pyrite (iron disulfide). Most have 6-8% iron content total. The big issue, most terra cotta bodies have higher levels of sulfides: lots of coal fields in Ohio. Your dark cube is one indication of that, the other is your slip peeling. If you do bisque fires on a regular basis: make a 1” x 6” x 1/2” thick test bar with this clay. Throw it in with your regular bisq at medium, or higher speed: if that is your normal cycle. Snap it in half when it comes out: look for dark coloration. That will tell you what direction you need to go. Nerd Quote Link to comment Share on other sites More sharing options...
Babs Posted December 11, 2023 Report Share Posted December 11, 2023 @Dave Earley, glaze nerd has replied. Might help you with your research Quote Link to comment Share on other sites More sharing options...
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