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<p>[QUOTE=&quot;V. Kurt Bellman, post: 2499309, member: 71723&quot;]Well I at least am NOT talking about an acetone bath, but my own adaptation of an Eastman Kodak Company formula that was used to clean darkroom towels and textiles that had become stained with silver sulfides. I think it was called SR-1 and its active ingredients were thiourea and citric acid, NOT a more potent acid. It didn&#039;t destroy fine cotton dress shirts, so I figured (correctly) it was a gazillion times more gentle on metal than commercial dips. It is something any collector needs to look into. The dip times can run to MINUTES, not seconds.</p><p><br /></p><p>And by RAISING the pH by putting in baking soda, the dip can actually be reversed to TONE silver coins, and they look EXACTLY like the splotchy brown toning seen often in Heritage and Stacks Bowers catalogs.[/QUOTE]</p><p><br /></p>

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