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<p>[QUOTE=&quot;gsimonel, post: 2971662, member: 82549&quot;]It can take a while--15, 20 minutes even--for the coin to start bubbling. Here&#039;s a site I found with some information:</p><p><a href="http://www.mycoincollecting.com/collecting/cleaning-coins-electrolysis.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.mycoincollecting.com/collecting/cleaning-coins-electrolysis.html" rel="nofollow">http://www.mycoincollecting.com/collecting/cleaning-coins-electrolysis.html</a></p><p><br /></p><p>The only thing they get wrong is that they suggest using salt in the water. The salt becomes very corrosive to the coin once the reaction kicks in. You are better off using sodium carbonate, e.g. Arm &amp; Hammer Washing Soda (not baking soda). You can usually find this in most grocery stores in the laundry detergent section, usually near the Borax.</p><p><br /></p><p>And don&#039;t add lemon juice, either.</p><p><br /></p><p>If you must use salt, then periodically stir in some baking soda (not washing soda--sorry this is so confusing) the neutralize the acidity, which increases as the salt breaks down.[/QUOTE]</p><p><br /></p>

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