Discussion in 'Error Coins' started by longarm, Oct 23, 2018.
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to start with.
A corrosive agent or oxidizer reacted with the coin's surface, long and hard enough to go fairly deep. This reaction produced a layer of copper oxide, and that's what peeled off. At least, that's my bet.
Cool, Did the layer that you took off crumble up into a sand like texture?
Yeah, it turned to dust when I rubbed it between my fingers. It weighs only 2.7 grams now.
Yeah, I think you're right.
burst as the zinc interior boiled. But copper cents got exactly the kind of layer you show here, and it behaved exactly the same way.
I haven't yet managed to melt cupronickel, and I don't think I've melted copper/bronze, but I've softened silver enough to warp a Roosie (which was already holed, and fated to suffer a grisly death in one experiment or another).
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