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Why is this 1996 D penny a gold color?
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<p>[QUOTE="Burton Strauss III, post: 3915926, member: 59677"][USER=108913]@TinkerTanker44432[/USER] you have the facts inverted the core is zinc and the plating is copper. But otherwise heating the coin hot enough to form a brass alloy it's theoretically possible. Just has to get a lot hotter than you think.</p><p><br /></p><p>Another possibility is zinc poisoning of the plating bath. The ion exchange that creates the copper plating can also leave some zinc ions in the copper solution. If it's not changed out soon enough then the plating becomes brass instead of pure copper.</p><p><br /></p><p>The third possibility is a science experiment where somebody plated the coin, possibly with a few atoms thick of gold and stopped before it really got a bright gold color.</p><p><br /></p><p>Am XRF gun would give you data, but it would only give you information to satisfy the intellectual curiosity.[/QUOTE]</p><p><br /></p>
[QUOTE="Burton Strauss III, post: 3915926, member: 59677"][USER=108913]@TinkerTanker44432[/USER] you have the facts inverted the core is zinc and the plating is copper. But otherwise heating the coin hot enough to form a brass alloy it's theoretically possible. Just has to get a lot hotter than you think. Another possibility is zinc poisoning of the plating bath. The ion exchange that creates the copper plating can also leave some zinc ions in the copper solution. If it's not changed out soon enough then the plating becomes brass instead of pure copper. The third possibility is a science experiment where somebody plated the coin, possibly with a few atoms thick of gold and stopped before it really got a bright gold color. Am XRF gun would give you data, but it would only give you information to satisfy the intellectual curiosity.[/QUOTE]
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Why is this 1996 D penny a gold color?
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