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<p>[QUOTE=&quot;desertgem, post: 1757419, member: 15199&quot;]Its everyone money. Google for the Intercept (tm) patent by Lucent Tech. and you will find it is basically a plastic sheet with cu ions to combine with the &#039;toning and corrosion &#039; gases. You can do the same with a Zip Lock and some new zincons you have scrubbed bright copper. When they turn red-brown, replace or rescrub them.&nbsp; The copper plating on these coins is 100% copper and when you scratch/scrub them , there is no more active copper for corrosion prevention. Cost&nbsp; less than 10 cents for bag and coins, and you recharge them each time you replace or scrub. Their bags don&#039;t so you have to buy new ones when the old one stop protecting~ and how do you know when??? IMO.[/QUOTE]</p><p><br /></p>

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