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<p>[QUOTE=&quot;Oldhoopster, post: 2756045, member: 84179&quot;]Not second or third hand information. It&#039;s basic chemistry.</p><p><br /></p><p>Acetone is a solvent because its molecule has a charged end. The energy in the charged end can react and break bonds of other molecules with weaker bonds. A lot of organics have weaker bonds and love to give up atoms/molecules to acetone. This breaks down the organic molecule and allows to be easily dissolved and/or removed. Metals and toning compounds such as AgS are held together with much stronger bonds. There just isn’t enough energy in solvents like acetone or water to break metallic bonds.</p><p><br /></p><p>Dips work differently. They cause a chemical reaction to occur with the toning compounds. This chemical reaction breaks the stronger bonds and removes the toned layer. Since the toned layer contains atoms from the original surface, actual metal from the coin is removed</p><p><br /></p><p>The following was written with apologies to all the chemists out there who are probably cringing after reading this simplistic explanation (I should have listened to Dr. Bentz and taken organic chem like he recommended <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie46" alt=":facepalm:" unselectable="on" unselectable="on" />). Please jump in and correct any errors or inconsistencies.[/QUOTE]</p><p><br /></p>

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