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<p>[QUOTE=&quot;k9brain, post: 748225, member: 19310&quot;]What a coincidence!</p><p><br /></p><p>I just got my Spectrline model ENF-260C shortwave Ultra Violet source (black light) in the mail today.&nbsp; I&#039;ve been looking at everything in the apartment with it.&nbsp; I noticed some of my coins would glow yellow (or florescence) under UV light.&nbsp; Upon close inspection the coins could have been cleaned.&nbsp; </p><p><br /></p><p>As you can see in the photo, the coins on top have florescence while those below don&#039;t.&nbsp; The stuff to the right is liquid dish detergent and powdered dishwasher detergent which also florescence.&nbsp; The pics don&#039;t show this well.&nbsp; The rocks above are Franklinite and Williamsite, the reason I bought the light.&nbsp; The coins are not reflecting the glow from the rocks.&nbsp; They glow all by themselves.</p><p><br /></p><p>Here&#039;s my theory.&nbsp; Coins cleaned with detergent will fluoresce, so will certain molds and mildew.&nbsp; Just look at my fridge under UV light, trust me, no detergent has been used there for some time.&nbsp; If for some reason your coins have slight mold mildew problems, the TPGs will reject them after looking at them under UV light.[/QUOTE]</p><p><br /></p>

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