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<p>[QUOTE=&quot;SuperDave, post: 2557481, member: 1892&quot;]To me, as a (literally, it&#039;s hardwired) obsessive practitioner of the dark art, the idea of suspending a coin in a baking soda solution is rather like discovering a spider crawling on me. Even if you tell me it&#039;s not a colloidal suspension I won&#039;t believe it. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> And boiling water moves (convection), so that was out of the question. It was only when I thoroughly mixed the solution first, and baked it in an oven to an assuredly constant temperature throughout to minimize convection, that I was able to begin achieving results which both satisfied me and kept away the heebie-jeebies. I experimented with single layers of foil and turning the coin, flapjack style; sandwiching it between perforated foil layers; aluminum screen; thicker sheet aluminum; pure aluminum pans; you name it.</p><p><br /></p><p>Dirty little secret: <b>all</b> of them work, more or less. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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