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<p>[QUOTE=&quot;dreamer94, post: 292679, member: 6449&quot;]Don&#039;t forget that silica gel packs become saturated and have to be regenerated (by heating in an oven) periodically.&nbsp; How long they last depends on their size and the ambient conditions.&nbsp; I have dessicant canisters with indicators and I found that over the summer, I had to regenerate them every couple of weeks and that was even though they were stored in a plastic storage container.&nbsp; Also keep in mind that the silica gel packs that come with consumer electronics tend to be very small and get saturated quickly.&nbsp; You can buy much larger ones from coin supply dealers.&nbsp; They&#039;re not expensive so you can buy a large number of them.&nbsp; </p><p><br /></p><p>If you put the proof sets into ziplock storage bags with a dessicant pack they&#039;ll be protected from humidity for a much longer period of time without having to change the dessicant packs.&nbsp; That method also allows you to look at the coins without exposing them to the air.[/QUOTE]</p><p><br /></p>

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