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<p>[QUOTE=&quot;RickieB, post: 514042, member: 2486&quot;]Jim...the pH range you describe is indeed more basic..however, that makes it more of a caustic solution....I would still question its use on coins as a cleaning agent. Should be an interesting experimet to say the least. DO you have the ability to photograph with a microscope the see if the surface detail really changes or not?</p><p><br /></p><p>What disipline in Science?</p><p>I work in small scale process development cultures.</p><p><br /></p><p>RickieB[/QUOTE]</p><p><br /></p>

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