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<p>[QUOTE=&quot;medoraman, post: 1640748, member: 26302&quot;]Its all relative Doug. I was saying humidity, (promoting the reaction), and a sulfur source in the storage materials, are MUCH more of a concern than air quality. I concentrate on those things that would do 90% of the damage before I stress about the last 10%. I never said if you take care of humidity and sulfur toning would STOP, but if you take care of the first two it will SLOW considerably. For the small amount air quality will affect coins in storage, I put out loose fresh silver hoping they will take the toning hit first, and replace as needed. </p><p><br /></p><p>Between all of that, and storing in plastic tubes, I have kept silver and copper brightly untoned for a couple of decades now. Maybe it would not work forever, but seems to at least keep most toning in check.[/QUOTE]</p><p><br /></p>

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