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<p>[QUOTE=&quot;Vess1, post: 1206114, member: 13650&quot;]I don&#039;t know what&#039;s in the zip-lock freezer bags but I&#039;d ask the manufacturer for some product data just to know what exactly is in them before using them.&nbsp;&nbsp; If there&#039;s PVC in the plastic, you&#039;re better off not using them.&nbsp; </p><p><br /></p><p>&nbsp; The intercept shield slab boxes come with individual slab covers that are made of the same material.&nbsp; So you get protection from the slab which is not completely impervious but about as air-tight as you can expect.&nbsp;&nbsp; Then a IS cover that it slides into with an open window in the front so you can still read the label.&nbsp;&nbsp; Then they go into the IS box.&nbsp; Then that goes into the SDB, which itself is another layer of protection.&nbsp; </p><p><br /></p><p>&nbsp; I&#039;d get a large, re-chargeable bag of Silica-gel to thow in the SDB with everything, and check it every couple of months.</p><p><br /></p><p>&nbsp; This is far more protection than coins got in the 19th century.&nbsp; Probably far more than they got in all of the 20th century.&nbsp;&nbsp; It&#039;s hard to do much more for them.&nbsp;&nbsp; I don&#039;t know but being encased in plastic bags 24/7 might do more harm than good.[/QUOTE]</p><p><br /></p>

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