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<p>[QUOTE=&quot;GDJMSP, post: 8178785, member: 112&quot;]Xylene is a bit &quot;stronger&quot; than acetone, but it won&#039;t remove verdigris either. That said I don&#039;t doubt what you&#039;re saying because verdigris is often a soft powdery substance that would do pretty much the same thing to a degree - flake off and mix with any fluid even distilled water - when allowed to soak in it. I&#039;ve seen times when you could literally blow some of the verdigris off a coin when it&#039;s soft and powdery like that. So it makes sense that it would tint the xylene after a prolonged soak.</p><p><br /></p><p>It is also quite normal and to be expected that when you use acetone or xylene, that the substance you&#039;re removing with it dissolves in the acetone or xylene and changes its color. And that is precisely why when you ever you use either one, a three step process, using clean acetone or xylene each time, is required - specifically so you avoid leaving contaminants dissolved in them on the coin. </p><p><br /></p><p>It could also be that there was something else, other than verdigris, on the coins that dissolved in the xylene and caused the color change in the xylene and on the coins. But copper, in and of itself, doesn&#039;t react with xylene at all.[/QUOTE]</p><p><br /></p>

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