Atlas wrote: ↑Fri Jan 05, 2018 12:29 am
I guess the way I see it, there's fear around ingenuine yixing (because it's no-longer this exotic mystical
natural thing), but I've never seen that level of caution applied to western potters - no-one's getting scared that Andrzej Bero might be using "artificial" clays (I'd assume he's buying clay bodies off the shelf and not digging clay out of his backyard), you know?
I don't think it's about "natural" vs "artificial". All chemistry is natural, but that includes poisons too. IIRC old yixing pots have been tested for lead and other potentially harmful compounds and they came out as safe. Some fake yixings smell weird when pouring hot water, unlike Bero's pots, suggesting that at least some of the fake yixings have an obvious problem. What happens when one has a yixing which looks like other stuff has been added to the clay? It could be fine (as F1 heini is I think) - or it could be problematic. Even if it does not smell weird, it might still leach. So it's up to one's decision whether to risk it or not. One could test it, but it's not really worth the cost for a fake pot. And given that gaiwans work well for most teas, and real yixings are not so impossible to get, I would not really see the point of risking it.
The other point is the aesthetics. Mixing additives to the clay needs to be done with elegance to produce good aesthetic results. Otherwise, one might end up with a teapot equivalent of neon green pants. There are many such pots on the market nowadays, with not-so-good craftsmanship and remarkable colors to grab attention and look unusual, but I don't find their "look at me" style very appealing.
Many of Bero's pots are glazed, and there are quite stringent rules on glaze safety because there have been so many cases of lead leaching in the past. Also in Bero's case, there's a point to be made about the aesthetic of his work, the pots are handmade, and quite creative. So I do think that Bero's pots and the mass-produced "yixing" with additives are quite different cases.