I was curious if tin is or can be (depending on purity, particle size, and I wouldn't know what else) a food-safe alternative to much the more expensive food/silver/etc. powders.
I bought some tin from Mejiro a while back. Their web page says "completely safe for food-contact items like tea cups, soup bowls, and dinnerware." It was cheap and "food safe", so why not?
Haven't used it yet. But recently, I happened to be reading the page from the second pic (from the Goenne site). According to them, tin is specifically NOT food safe.
Two reputable sources are contradicting each other. Odd. And well outside my experience to reconcile.
I went back to the Mejiro site and now noticed the caveat at the bottom, "If absolute safety for direct food content is your priority, use good or silver instead."
Mejiro' listing seems to want it both ways, and as near as I can tell there's no MDSD to examine for more detailed information.
Google alleges solid tin is perfectly safe to eat and cook with, and that tin is poorly absorbed by the human digestive system, minimizing absorbtion when dealing with small quantities of the material. All with the caveats that purity, possible contaminants and specific alloy reactions, etc., could all be important considerations.
And for all I know regulations between Japan and the US (where I live) could be completely different on this point.
Does anyone know if this tin powder is, in fact, truly safe to use in an intended-for-food kintsugi project? Or if it's "pretty safe" (as Mejiro seems to be implying), what the potential risks might be? Or even if it's specific to a particular use case or application technique?
Thanks in advance.
P.S. Here are the links to the two pages. Sorry, but for whatever reason reddit won't allow me to embed hyperlinks right now.
https://www.mejiro-japan.com/en/product/japanese-tin-powder-kintsugi-repair-tin-powder
https://www.goenne.com/post/food-safe-kintsugi-is-your-kintsugi-repaired-tableware-safe-for-food-and-drinks