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Tyler Miller

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    Ontario

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  1. I seem to have stepped into something unintentional. I said two things in my initial comment. 1) There is a legal aspect of this that should be discussed with the proper experts 2) There is a ceramic aspect, which, given the conditions of the OP, is terracotta. I also said flameware bodies are superior in certain applications. The reasoning for my comment was the cost of research and development of a flameware body for personal use is disproportionate to its benefit. I would argue that the proper development of a flameware body for market is cost prohibitive for reasons related to the leg
  2. Bill, I took the time to find the context of the article you posted there. I'm not sure it's saying what you're thinking it does? Full article you excerpted is here: https://maxwellsci.com/print/rjees/v3-541-545.pdf Health Canada's maximum acceptable concentration for arsenic in drinking water is "10 ppm" this can be expressed as 10 μg/g (see link here https://www.healthlinkbc.ca/healthlinkbc-files/arsenic-drinking-water). 10 micrograms per gram is the maximum concentration allowed to be contained in drinking water. The article expresses that the average As content of the ear
  3. The website is health washing. Re: lead cadmium and barium (and arsenic! mentioned on the website). As long as your clay isn't coming from an industrial waste dump, it's a non issue? Cadmium that doesn't come from ceramics really only comes from industrial waste (google "itai-itai disease"). I'm pretty sure arsenic salts as a general rule sublimate out before earthenware matures (google that, though). I'm also pretty sure that any chemically significant amount of lead in a clay body (significant enough to cause toxicity issues) would have undesirable effects as a body flux on the cl
  4. There are two issues at work here. One ceramic, one legal. The legal aspect, is jurisdictionally related and is best left to the OP to figure out in their jurisdiction. Legal advice from legal experts, ceramics advice from ceramists. Mmkay? Good. The second question is re: non toxic cookware body. Terracotta, as has been mentioned, has been considered the standard cookware the world over for millenia across all human cultures. Firing low (like cone 017), sealing with oil, and using a heat diffuser on the stovetop are all you need. There are other flameware bodies (which are better
  5. https://en.m.wikipedia.org/wiki/Green_liquor It’s prolly this. All the necessaries are in the ash and iron is more likely a metallic contaminant than copper—occurring in an abundance orders of magnitude greater than Cu. This paper maybe helpful: https://www.nrcresearchpress.com/doi/pdfplus/10.1139/v78-462 (edited to make functional link) Kind regards, TM
  6. I don’t think it’s knowledge that’s (nearly) been lost, but rather knowledge that hasn’t been (consistently?) applied to a studio context. I’ll bet every ceramics factory in existence currently has the temp of their production floors optimized for casting production—it would cost too much in failures not to. A porcelain bathroom fixture is bigger, more complex, and requires more steps to production than all but the most intricate of large scale work. It’s easy to forget we are a small minority in the ceramic world and for that matter, what a large percentage of what we live with
  7. Guys, it’s albany slip. Hudson river...silty low fire clay with soluble salts.....
  8. I think the truth is industry could make a superior product, but cost/benefit analysis led them away from that long ago.
  9. Nothing at all. I do feel the need to say that the former link of the two French engobe sites is very much earthenware only. Immediately apparent to a French speaker, but maybe not to a non-fluent, or non-speaking browser in the context of a discussion on cone 6 engobes. At cone 6 that much talc and frit might not play so nice. The text of the second link looks very familiar...
  10. I had a semi-ridiculous conversation back in January while working in a studio in town. The crux of my interlocutor’s point was “what’s the point of makig functional ware? Industry does it better, so why try?” She’s a tile artist, and this opinion came out to Tony Clennell on another occasion (according to her). His response was “well, clearly you don’t drink enough tea.” A response I liked. My answer, then unexpressed, is that I prefer a life of messy stories of provenance, and a thoughtful interaction with objects that maybe don’t quite fit, but have flair in their failings.
  11. Chronic vs. acute poisoning. The battered sweet potatoes were an incident of acute poisoning. This is a studio hazard to be sure, but a less likely one than chronic. Over time barium can cause problems with organ function eventually causing failure. The big one being kidneys. This can be the real hazard.
  12. Monona Rossol’s book is probably a good starting point. It’s generally addressed to artists, not just ceramists, but it should help. Then talk to your GP, talk about your concerns and maybe come up with a strategy. Your doctor is your #1 go to for health info. They may not know everything off the bat, but they know how to get you plugged in to where you need to be. It helps if you know a little about the materials going in, so that you can help the doc orient themselves in the issue. Pairing this with msds sheets (despite their limitations), and independent research will flesh o
  13. Honestas probitasque per se desiderandae.

    1. Min

      Min

      Thank goodness for google translator, guessed at most of it. Good tenant to live by.

    2. Tyler Miller

      Tyler Miller

      It’s a paraphrase of Cicero, against the Epicureans.

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