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Difference between red and brown copper toning?
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<p>[QUOTE="mrjason71, post: 2927395, member: 90347"]I've heard (read) you say that copper begins turning the moment it leaves the mint (or sooner). There are many shades it turns before being considered brown--red encompasses quite a few shades, no? From pink to orange...</p><p><br /></p><p>Did an experiment last night. Dropped a few cents in a plastic bag with a sulfur emanating substance. I can see it is definitely a gradual process. What is interesting is that the cents that were full red to begin with--those with full luster--tone much less slowly. Those places where luster were broken really toned fast and are brown over night. The toning is also very spotty. I'm thinking luster is what makes copper tone evenly. Or is luster tone? I believe that's the case. Fascinating stuff. You need even luster to get even color. All other things being equal. Thanks as always for considering my questions. Learning a great deal <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="mrjason71, post: 2927395, member: 90347"]I've heard (read) you say that copper begins turning the moment it leaves the mint (or sooner). There are many shades it turns before being considered brown--red encompasses quite a few shades, no? From pink to orange... Did an experiment last night. Dropped a few cents in a plastic bag with a sulfur emanating substance. I can see it is definitely a gradual process. What is interesting is that the cents that were full red to begin with--those with full luster--tone much less slowly. Those places where luster were broken really toned fast and are brown over night. The toning is also very spotty. I'm thinking luster is what makes copper tone evenly. Or is luster tone? I believe that's the case. Fascinating stuff. You need even luster to get even color. All other things being equal. Thanks as always for considering my questions. Learning a great deal :)[/QUOTE]
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Difference between red and brown copper toning?
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