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<p>[QUOTE=&quot;desertgem, post: 1379230, member: 15199&quot;]Yes, I mean not checking. Usually people do when they first have the units, but life happens and months later they open the safe to get something our and find it needs recharging.</p><p><br /></p><p>Any post 1982 that are copper clad will work fine. Out of a roll or out of circulation will work if scrubbed up harshly. These cents, even fresh out of a roll will have some patina on the surface. Removing it is like waving cheese pizza at a dog. bad chemicals attach and reat with it. Due to laws of diffusion/equilibrium, when the cent reacts with say a sulfide radical, then equilibrium will shift another into the empty area, and when that reacts, another will shift in, etc, etc. so the overall amount in the safe will decrease and your other coins with some patina will be better protected. But the poor &quot;red&quot; sacrificial cent will start turning first golden, then red brown then brown. I would replace or rescrub before red brown. It depends on how clean your local air is how often you need to do this, but it is an easy job. </p><p><br /></p><p>Silica collects moisture, not the corrosive compounds. True, the more moisture you have, the easier for the reactions to occur, but if you remove the corrosive compounds from the air, there will also be less reactions. Both the silica ( with or without indicator ~ reheat when your scrubbed cent turns) and the cent will increase your protection.</p><p><br /></p><p>You can do the same putting a bare scrubbed copper clad cent in 2x2 boxes, slab boxes, where-ever you store coins in or out a safe to limit reactants and keeping your red cents red longer. IMO.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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