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<p>[QUOTE=&quot;usmc60, post: 2910868, member: 76739&quot;]Kurt I&#039;ve known you open rolls of cents directly from the meant. All those white residue marks is left over cleaning residue. This residue is heat dried into the blank.</p><p><br /></p><p>I find it shows up better on the cents, there is almost too much reflection on quarters&nbsp; dimes nickels but it&#039;s there.</p><p>I think as far as the sniffer goes to identify the cleaning solution.</p><p>I believe this would involve a little more of a test to determine the chemical composition of the solution. What do they call it on CSI a gas chromatograph. LOL[/QUOTE]</p><p><br /></p>

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