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<p>[QUOTE="SuperDave, post: 2412146, member: 1892"]Your best bet for acetone soak containers are larger shotglasses, which hold more than 1.5oz while still being small enough to force the coin to remain tilted and not flat. Any more than that is wasted acetone, because you <b>do not reuse acetone</b> after a soak. Acetone is a "total loss" conservation system. <b>Always</b> cover the container, from both a safety and economy standpoint. Bman's concept of leaving the container next to an open doorway is fine unless the wind is blowing <i>in</i>....</p><p><br /></p><p>That said, one shot glass full of acetone is not going to burn your house down unless you're very diligent in your lack of diligence. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Acetone doesn't naturally penetrate problems on a coin to the same extent that water does - part of the process of successfully using it is the "rinse/swish" step which gets short shrift in most discussions. To that end, soaks of more than a few days are probably useless; I've never gathered a bunch of problem coins in one place to do a controlled test of that idea because if a coin needs to go into acetone, it has a problem you want fixed quickly. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> </p><p><br /></p><p>Fingerprints are iffy. The permanence of their adhesion - and the time it takes to become permanent - are affected by the quality of the surface of the coin and its' preparation at the Mint. A little contamination already on the coin will prevent a fingerprint from adhering for a while; the more clean and pristine the surface, the quicker a fingerprint will become permanent. </p><p><br /></p><p>And keep in mind, acetone is an organic solvent. Non-organic chemical processes - "tarnish" - are unaffected by it.[/QUOTE]</p><p><br /></p>
[QUOTE="SuperDave, post: 2412146, member: 1892"]Your best bet for acetone soak containers are larger shotglasses, which hold more than 1.5oz while still being small enough to force the coin to remain tilted and not flat. Any more than that is wasted acetone, because you [B]do not reuse acetone[/B] after a soak. Acetone is a "total loss" conservation system. [B]Always[/B] cover the container, from both a safety and economy standpoint. Bman's concept of leaving the container next to an open doorway is fine unless the wind is blowing [I]in[/I].... That said, one shot glass full of acetone is not going to burn your house down unless you're very diligent in your lack of diligence. :) Acetone doesn't naturally penetrate problems on a coin to the same extent that water does - part of the process of successfully using it is the "rinse/swish" step which gets short shrift in most discussions. To that end, soaks of more than a few days are probably useless; I've never gathered a bunch of problem coins in one place to do a controlled test of that idea because if a coin needs to go into acetone, it has a problem you want fixed quickly. :) Fingerprints are iffy. The permanence of their adhesion - and the time it takes to become permanent - are affected by the quality of the surface of the coin and its' preparation at the Mint. A little contamination already on the coin will prevent a fingerprint from adhering for a while; the more clean and pristine the surface, the quicker a fingerprint will become permanent. And keep in mind, acetone is an organic solvent. Non-organic chemical processes - "tarnish" - are unaffected by it.[/QUOTE]
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