No silver in stanous chloride just to keep the facts straight.

Here's some history for ya.

In the early 1880's Tiffany patented a process of exposing glass to metal fumes during manufacturing. Still it was done way before that by the Romans.

That is really a stretch. Fuming has been done over and over for hundreds of years it's nothing new.

What is new is that Bob discovered the color changing abilities of the metal fume. He did...