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Conservation Black Spots on Bronze/Copper
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<p>[QUOTE="mrjason71, post: 2990904, member: 90347"]Great stuff, desertgem--good food for thought. I'd like to find the right chemical--even if it's just to spot treat. </p><p><br /></p><p>I remember buying a Dansco Lincoln Cent with Proofs album. I then bought an entire set of Memorial proofs off of a guy on EBay...as I removed each coin from its flip, these little black spots starting forming right before my eyes. Craziest thing I'd ever seen. I imagine the seller treated these with somethjng and then quickly got them in flips. I was just sitting in my room temperature living room watching TV. Like the measles they popped up. And the flyspecks I spoke of earlier--they are slightly raised and feel like I could almost scratch them off with a fingernail. Mostly there's those Cents that look to have had carbon spots for years the size of the point on a Sharpie marker. They look almost like the coin absorbed a black liquid. Those I might have to admit defeat with. They are "in" the coin. I hold out hope for those "on" the surface. </p><p><br /></p><p>Sorry if I've wasted everyone's time. I hoped maybe lots of people would have lots of experiences with varying results and that it might be nice to have all this anecdotal info in one place. I'll keep up the search <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="mrjason71, post: 2990904, member: 90347"]Great stuff, desertgem--good food for thought. I'd like to find the right chemical--even if it's just to spot treat. I remember buying a Dansco Lincoln Cent with Proofs album. I then bought an entire set of Memorial proofs off of a guy on EBay...as I removed each coin from its flip, these little black spots starting forming right before my eyes. Craziest thing I'd ever seen. I imagine the seller treated these with somethjng and then quickly got them in flips. I was just sitting in my room temperature living room watching TV. Like the measles they popped up. And the flyspecks I spoke of earlier--they are slightly raised and feel like I could almost scratch them off with a fingernail. Mostly there's those Cents that look to have had carbon spots for years the size of the point on a Sharpie marker. They look almost like the coin absorbed a black liquid. Those I might have to admit defeat with. They are "in" the coin. I hold out hope for those "on" the surface. Sorry if I've wasted everyone's time. I hoped maybe lots of people would have lots of experiences with varying results and that it might be nice to have all this anecdotal info in one place. I'll keep up the search ;)[/QUOTE]
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Conservation Black Spots on Bronze/Copper
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