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<p>[QUOTE=&quot;silviosi, post: 25214250, member: 153002&quot;]I can not answer of your premises. I will tell my location, the cost and what I done.</p><p><br /></p><p>I made a room 4x6x8 fire proof and anti EMF, submarine air puricator, 20% sable humidity and the temperature ar stable 15 Deg. The light I use is difused incandescent. In this room I keep except the gold, the coins, stamps, banknotes and some Pictures.</p><p><br /></p><p>Then I have other 3 safe all with air purifyers, 15 Deg and 20% humidity. In an room at 15 Deg, 20% humidity. Here I have more pictures, furniture artifacts, porcelain and alot of jade artifacts.</p><p><br /></p><p>All cost me around 20K.</p><p><br /></p><p>By my studies in my Lab I find that the plated coins will stay stable at 15 Deg and 20% humidity, not developing any form of sulfate, sulfide, and all the oxidation inhibite.</p><p><br /></p><p>In the begining maybe some tonning will develop, but after short period will stop because will miss any activator. </p><p><br /></p><p>For me was worth,, is up to you to decide how to do.</p><p><br /></p><p>Do not forgot: any coin will can have traces or S, human secretions, traces of oills, slabed or 2x2 H, O, C, N, S. or also fungus. 12 to 15 Deg it is any OR temperature for stop any chemical reactions.</p><p><br /></p><p>Hope help. Silvio[/QUOTE]</p><p><br /></p>

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