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Storing coins in liquid nitrogen.
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<p>[QUOTE="Detecto92, post: 1779791, member: 75105"]Do you think all the MS coins that exist now, will be toned/tarnished 1000 years from now?</p><p> </p><p>I wonder what storage methods were used on some of the copper I've seen from the 1700s that is still mint red?</p><p> </p><p>You would think the oxygen content of the air would cause it to darken, much like copper pipes in an old house have turned brown for exposure to air.[/QUOTE]</p><p><br /></p>
[QUOTE="Detecto92, post: 1779791, member: 75105"]Do you think all the MS coins that exist now, will be toned/tarnished 1000 years from now? I wonder what storage methods were used on some of the copper I've seen from the 1700s that is still mint red? You would think the oxygen content of the air would cause it to darken, much like copper pipes in an old house have turned brown for exposure to air.[/QUOTE]
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