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<p>[QUOTE=&quot;bigjpst, post: 3711857, member: 21015&quot;]So this is exactly what I mean.&nbsp; You state that for years everyone knew that MS70 would or could change the color of copper blue and purple.</p><p>You also state that they sometimes grade the coins because copper coins will also naturally tone these colors.</p><p>I’ve clearly shown that not all copper coins were changed the same with the MS70. The&nbsp;&nbsp; 2 one centavo coins are the starkest difference. The BU coin did not change at all and the coin that had toning which had formed and would be considered Brown changes dramatically. Did the MS 70 strip away crust to show colors that you state can happen naturally or did the chemical react to something on that coins surface and create a color that wasn’t there? </p><p><br /></p><p>The centavos are actually brass and both came directly from mint sets with no other treatment that I am aware of.</p><p><br /></p><p>It seems you are OK with properly dipping silver and even using MS 70 on silver. Why is that acceptable? EZest and MS 70 clearly alter the surfaces of silver.</p><p>If you are in the camp that MS70 is creating a chemical reaction on the coin and artificially toning the coin then I can see why you think that is bad. I do too.</p><p><br /></p><p>But what my question to the masses is if MS70 is removing some kind of tarnish on the copper(exactly what dipping will do to silver)and the natural blue and purple colors are what’s left(colors that you state are possible naturally) is using MS70 actually conservation?</p><p>It is my assertion that people don’t know for sure but they will argue to the death anyway. Depending on which benefits them.</p><p><br /></p><p>You ask who cares what is causing it. I say we should all care. </p><p><br /></p><p>&nbsp;I’ve seen enough toned copper in TPG holders that looks too similar to the coins I’ve just shown to believe that the TPGs don’t give MS70 treatments a pass. At least they have in the past.</p><p><br /></p><p>Edited to add that a similar statement along with photos from CoinFacts are what probably got my thread nuked in the other forum.</p><p><br /></p><p>I’m not here to advocate for using MS70 on copper or any other coins for that matter. I’m here to show people what to look for.[/QUOTE]</p><p><br /></p>

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