Showing results for tags 'black stoneware'. - Ceramic Arts Daily Community

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Bubbles In Black Stoneware

dazzlepottery posted a topic in Studio Operations and Making Work

I have been having a strange issue with my Cone 6 Black Stoneware Clay from Standard (266). It gets these big cracking bubbles upon glaze firing. I bought this clay to marble with Porcelain (Standard 365) because it had a similar shrink rate. The marbled pieces came out SUPER bubbly, really horrible. I thought it was just poor clay preparation on my part because of the mixing of the two. However it has been happening with pots I make solely out of the Black Stoneware. I prepare this clay the same way I do all my other clay bodies and never really have this issue otherwise. Has anyone else had this problem with this clay? Any advice?
- May 11, 2017
- 42 replies
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Scarva Professional Black Clay bodies

Stu Haysman posted a topic in Clay and Glaze Chemistry

Hi, The Scarva Professional Black stoneware bodies (PF 660/70/80) are quoted as “not suitable for making domestic tableware”. Does anyone know why this is by any chance? Toxicity, or some other reason? Is this the same for all black stoneware bodies, or just these ones? Thanks Stu

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