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<p>[QUOTE=&quot;krispy, post: 856531, member: 19065&quot;]If it helps any, I&#039;ve left Chinese Pandas in their original plastic sealed bags and they are usually sealed in capsules inside of that. Both gold and silver have toned from the late 80s early/90s to today, while those not kept sealed did not tone as readily. Due to the Chinese Pandas forming copper-spots no the surface suspected to be from impurities and poor manufacturing conditions, I have sold all of my Panda coins to be free of those problems.</p><p><br /></p><p>Whatever the OP decides to do, the environmental conditions of where you live and how/where you store your coins will have an impact. Humidity, plastics, atmospheric gases, many things have an effect. Airtites and Intercept shield protectors tend to be very suitable for protection and prevention from outside elements effecting your coin more rapidly than if left in questionable materials or in the raw.</p><p><br /></p><p>With all of that said, I cannot say how palladium coins tone or not over time. Canadian Palladium Maples are .9995 pure, so there is some other compositional metal present that may also react/tone over time.</p><p><br /></p><p>And I too would like to have Elaine&#039;s sources at the US Mint if she&#039;s actually able to get Canadian Palladium Maples via the US Mint. :eating:[/QUOTE]</p><p><br /></p>

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