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<p>[QUOTE=&quot;desertgem, post: 2351478, member: 15199&quot;]Excepting polymer bills, currency is mainly made from plant material, and since such plants produce oxygen,&nbsp; oxygen isn&#039;t as bad as water vapor, or especially acidic environmental gases. Unlike coins, paper documents need a low level of water vapor or they dry and start to breakdown into individual flakes and fibers. Museum and document storage facilities usually say about 20-40% WV is an acceptable range. Some collectors don&#039;t realize this and store their paper money in a safe with desiccators and cause more rapid damage. Water vapor can diffuse through polyethylene very&nbsp; very slowly, but still almost 60X faster than oxygen, so control the water vapor problem first. If you live in an extreme ( desert, Florida) you will have difficulties.I would allow paper to stabilize outside the safe in a day with proper humidity, and then double or triple zip lock bag it, and maybe months later, on same type of day, open the zips, allow paper to reach equilibrium , and rezip.[/QUOTE]</p><p><br /></p>

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