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<p>[QUOTE=&quot;Burton Strauss III, post: 2804450, member: 59677&quot;]Interesting...</p><p><br /></p><p>&quot;X-ray Photoelectron Spectroscopy studies have shown that acetone, when used as a cleaning agent for copper in the presence of ambient light and water vapor, slowly reacts to form acetic acid. This reaction does not occur in the absence of light. This suggests that copper acts as a photocatalyst for the reaction between acetone and water vapor.&quot;</p><p><br /></p><p>Also that they let the acetone soak 17 hours until it evaporated. And if you read the paper, the beakers containing acetone were placed into a water bath to ensure humidity. Finally, in the absence of light the reaction was completely inhibited.</p><p><br /></p><p>So using low levels of light in a dry environment for short periods should be safe. But if you need long soaks, definitely use a dark environment with desicants.[/QUOTE]</p><p><br /></p>

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