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<p>[QUOTE=&quot;rmpsrpms, post: 2681476, member: 31773&quot;]When you seal the coins in storage, you can add a humidity indicator. These usually have indicators at 30%, 40%, and 50%. The dessicant will absorb the moisture to below 30%, so the 30% indicator should be blue as you insert it and stay blue for a while. Eventually, as the dessicant absorbs moisture, the humidity will rise, and the 30% indicator will turn pink. As time passes the 40% will turn pink as more moisture enters the container through diffusion from the outside. When the 50% indicator turns pink, it&#039;s time to replace the dessicant and indicator. This might take 6 months, or it might take 3 years, depending on how airtight the container is. I store OBW rolls in sealed plastic and my indicators have lasted up to 3 years, though I had a few that showed 50% after 1 year. When storing this way, I recommend checking on them at least yearly.[/QUOTE]</p><p><br /></p>

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