That may be the case GG, but I had a very reputable ceramicist warn me about a chawan I shared a photo of that had a glass bottom/chadamari (not made by any of the artisans on this board) - the ceramicist wanted me to know that some artists will use glass marbles to form those "pools" and that some marbles contain dangerous amounts of lead. The ceramicist suggested I might consider contacting the artist who made the chawan and finding out.
So, that made an impression on me, and this led me to wonder about other "cheap/inexpensive/less trackable" glass sources - and what they might contain, how they might have been colored etc.
Thus my question.
I'm pretty sure we don't want to be messin' with lead, at least I don't.
Does anyone/any artist know if lead is ever used in bottle making or whether one should be concerned about 'recycled glass'?
Also - how can one tell if that gorgeous "glass pool" chadamari is transformed ash or glass added to the piece and fired? Are there telltale signs?