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My Experiment using MS70 Coin Brightener.
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<p>[QUOTE="ewomack, post: 3712374, member: 15588"]I have always heavily suspected that shiny red copper coins from the 19th century <i>must have been</i> treated with something, but they look so great I just decided to ignore that obvious fact. So this thread confirms those suspicions, which honestly were 90% confirmed anyway, but now I know more about the process and the medium.</p><p><br /></p><p>I personally would avoid buying copper coins with bluish toning because I don't really like it. Now I have another reason to avoid them - it could be a sign of treatment.</p><p><br /></p><p>Another day, another thing learned.[/QUOTE]</p><p><br /></p>
[QUOTE="ewomack, post: 3712374, member: 15588"]I have always heavily suspected that shiny red copper coins from the 19th century [I]must have been[/I] treated with something, but they look so great I just decided to ignore that obvious fact. So this thread confirms those suspicions, which honestly were 90% confirmed anyway, but now I know more about the process and the medium. I personally would avoid buying copper coins with bluish toning because I don't really like it. Now I have another reason to avoid them - it could be a sign of treatment. Another day, another thing learned.[/QUOTE]
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My Experiment using MS70 Coin Brightener.
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