Found this one foil from a ceramic part that is almost absurdly thick! Don't know what the part was from, but one whole side was just this big piece of gold foil, thicker than lab-grade aluminum foil (which is like 4 sheets of regular grocery store foil thick). I estimate that it's about half a gram!
I'll be posting more vids in the coming weeks. I'm starting my foils refining with the HCl-bleach method. The first test was a resounding success, and the foils I have mixed up in a 500ml beaker in a shredded mass of incinerated, base-metal cleared circuit boards (I got a bunch of very old ones) have so much gold, I initially thought the reaction had failed because it looked like nothing dissolved. But when I did the drop, it looks like 2 grams dissolved... and the mass of fiber in the beaker is still FULL of gold foil bits! The recovery looks like it will be WAY above what I expected!
I'll be posting more vids in the coming weeks. I'm starting my foils refining with the HCl-bleach method. The first test was a resounding success, and the foils I have mixed up in a 500ml beaker in a shredded mass of incinerated, base-metal cleared circuit boards (I got a bunch of very old ones) have so much gold, I initially thought the reaction had failed because it looked like nothing dissolved. But when I did the drop, it looks like 2 grams dissolved... and the mass of fiber in the beaker is still FULL of gold foil bits! The recovery looks like it will be WAY above what I expected!