All I can tell you about the origin of this hand crafted copper sheet with patina is that it is from The Bulldog in Ontario, Canada. Patina is what happens to copper when it is left exposed to the elements(example: The Statue Of Liberty is made of copper and has a patina on her). The Bulldog more than likely sped up the patina process with a chemical that makes it happen rapidly. I do like the blue and orange coloration together. It seems like a winning combination(you NFL fans might get my hint). Thanks for sharing your metal works with us, Bulldog!