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Showing results for tags 'lead'.
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This is my first post to the forum. I am a ceramic sculpture working with exotic and sometimes controversial metals. I am also an experienced chemistry teacher with a BS in chemistry. I am well aware of the health concerns related to using lead as a glaze ingredient. I take the appropriate precautions so please save your time if you are going to lecture me about safety or try to convince me I shouldn't use the material. My work is strictly sculptural (display wall pieces) and I make the presence of toxic chemicals in my surfaces very clear to potential buyers. I am not interested in anecdotal opinions about lead use and the dangers of lead. My studio has a kiln specific for use of toxic chemicals so these concerns are also accounted for. I have a number of collected recipes for use of white lead along with successful tests. My current interest is in red lead and yellow lead chromate both of which I acquired earlier this week. Before I start my tests I wanted to see if anyone in the forum has proven results using these materials and their use in color development. Low-fire cone 08-04. Oxidation. In particular I'm looking for experience with sodium uranate oxidation color development using lead in low fire ranges. I've also heard zinc and selenium can be used along with lead for Uranium color development. I possess and am currently using sodium uranate in my glazing so safety lectures about this material can be avoided. The google searches I've done on these topics are dominated by the theme of safety and not glaze recipes, my primary interest. Thanks for the support.
ashleigh_arts posted a topic in Clay and Glaze ChemistryHello everyone! I'm new here, and I've been reading some threads. I was wondering if anyone might know of anyone or might have stashed somewhere, the Blue Marble glaze from Mayco Jungle Gems. This glaze was discontinued in the early 2000s because of its lead content. I just recently discovered it when someone had a tiny amount for me to glaze a pinch pot. I glazed it at cone 6 instead of 06 (oops) but it came out AMAZING! (Turns out Jungle Gems CAN be fired at cone 6!). The Mayco rep contacted me about my inquiry and is sending me a package of glazes to play around with to see if I can recreate it, but I would really like to find something very similar or some that someone isn't using. I will pay a reasonable amount for this! Questions: Is touching a piece made with lead glaze harmful? Once a lead glaze is fired is it still dangerous?