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<p>[QUOTE="GDJMSP, post: 3710384, member: 112"]You can go back 20 years on the NGC and PCGS forums and find posts/threads discussing this subject of MS70 and copper coins. Even back then, it was <b>known</b>, by virtually everybody that knew anything, that using MS70 could on copper coins could and would result in the coins turning some shade of blue and or purple. And even back then, some were slabbed but a great many more were not. And back then there was no such thing as problem coin slabs - there were body bags. Bottom line, using MS70 on copper was something that you just didn't do ! At least not unless you were trying to produce artificially toned coins so you could sell them for a premium.</p><p><br /></p><p>And the reason that worked was also simple. It was because copper coins sometimes toned those colors completely normally, naturally.</p><p><br /></p><p>As for the argument that it's not the MS70 causing this toning, but a reaction of the MS70 with something on the coin that causes the toning - WHO CARES WHAT'S CAUSING IT ! There's only one thing that matters - that it happens at all - and quite often !</p><p><br /></p><p>If there is something on the coin that cause this, you have absolutely no way of knowing that <b>before</b> you treat the coin with MS70. And once you do treat the coin it's already done. So why risk it ? Simply do not do it !</p><p><br /></p><p>Now can you reverse this, remove the color produced ? Sure ya can, if ya know how, but most don't know how. One way is to dip the copper, that'll take the color off alright. But then most folks are gonna pipe up and say - wait a minute you can't dip copper. Well, horse puckey ! You can dip copper, it's been being done for decades ! And the fact that there are so very, very many copper coins designated as Red in TPG slabs proves it. In point of fact there are more Red copper coins in slabs than there are RB or BR combined ! And yet copper is the most reactive of our coin metals - it tones faster and more readily than all other coins. And yet there's more red ones than anything else.</p><p><br /></p><p>The whole issue is most folks don't know how to properly dip copper, so they claim it can't be done because they can't do it. But that does not mean somebody else can't do it. Not only can they - they do ! And they have been doing so for decades. And the proof of it is right in front of everybody's eyes - but they simply can't see it because they don't wanna see it. It would ruin their perceptions of value regarding copper coins. And that's something they just can't tolerate.</p><p><br /></p><p>But copper and MS70 - I advise you not to do it. And there's no reason too. There are other methods to properly clean copper, that are just as effective, but yet do not risk turning the coins blue or purple.</p><p><br /></p><p>And the TPGs, nothings changed regarding this - some they slab, some they don't.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 3710384, member: 112"]You can go back 20 years on the NGC and PCGS forums and find posts/threads discussing this subject of MS70 and copper coins. Even back then, it was [B]known[/B], by virtually everybody that knew anything, that using MS70 could on copper coins could and would result in the coins turning some shade of blue and or purple. And even back then, some were slabbed but a great many more were not. And back then there was no such thing as problem coin slabs - there were body bags. Bottom line, using MS70 on copper was something that you just didn't do ! At least not unless you were trying to produce artificially toned coins so you could sell them for a premium. And the reason that worked was also simple. It was because copper coins sometimes toned those colors completely normally, naturally. As for the argument that it's not the MS70 causing this toning, but a reaction of the MS70 with something on the coin that causes the toning - WHO CARES WHAT'S CAUSING IT ! There's only one thing that matters - that it happens at all - and quite often ! If there is something on the coin that cause this, you have absolutely no way of knowing that [B]before[/B] you treat the coin with MS70. And once you do treat the coin it's already done. So why risk it ? Simply do not do it ! Now can you reverse this, remove the color produced ? Sure ya can, if ya know how, but most don't know how. One way is to dip the copper, that'll take the color off alright. But then most folks are gonna pipe up and say - wait a minute you can't dip copper. Well, horse puckey ! You can dip copper, it's been being done for decades ! And the fact that there are so very, very many copper coins designated as Red in TPG slabs proves it. In point of fact there are more Red copper coins in slabs than there are RB or BR combined ! And yet copper is the most reactive of our coin metals - it tones faster and more readily than all other coins. And yet there's more red ones than anything else. The whole issue is most folks don't know how to properly dip copper, so they claim it can't be done because they can't do it. But that does not mean somebody else can't do it. Not only can they - they do ! And they have been doing so for decades. And the proof of it is right in front of everybody's eyes - but they simply can't see it because they don't wanna see it. It would ruin their perceptions of value regarding copper coins. And that's something they just can't tolerate. But copper and MS70 - I advise you not to do it. And there's no reason too. There are other methods to properly clean copper, that are just as effective, but yet do not risk turning the coins blue or purple. And the TPGs, nothings changed regarding this - some they slab, some they don't.[/QUOTE]
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