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<p>[QUOTE=&quot;gatzdon, post: 213401, member: 8247&quot;]A couple questions:</p><p><br /></p><p>1. I thought the current colors for the security threads were standardized back in 1996 (or as they rolled out), but I just wanted to double check?</p><p><br /></p><p>2. Can the color of the security thread fade or change with the age of the note?</p><p><br /></p><p>3.&nbsp; Can the ability for the security thread to floresce fade or change with the age of the note?</p><p><br /></p><p>4. Is there a specification from the BEP for the wavelength of the UV light used to check the color of the security thread?</p><p><br /></p><p><br /></p><p>Background:</p><p>So, since I&#039;ve been going through a substantial amount of kennedy halves lately, I&#039;ve been getting a substantial amount of cash when I return them (I return the coins to a different bank than the one I got them at).</p><p><br /></p><p>I&#039;ve read plenty of gripes on the internet how people have received a counterfeit bill from a Bank and basically once they walk out, the bank disavows all responsibility.</p><p><br /></p><p>Well, I&#039;ve got a UV Pen Light.&nbsp; It was intended for reading invisible ink, but it worked just fine for finding the leak on my air conditioner system on my truck.&nbsp; Up until now, it seemed to work fine for just about anything that needed a UV light.</p><p><br /></p><p>So I start looking through the cash I have laying around and I can see the threads on my 5&#039;s, 10&#039;s, and 20&#039;s floresce but have trouble seeing the color.&nbsp; The 5&#039;s and 20&#039;s appear to floresce the brightest, but I can&#039;t tell the difference between the two very well.&nbsp; The 10&#039;s definitely look orange through the UV light.</p><p><br /></p><p>I go to the bank today and cash in $1860 worth of halves.&nbsp; I get 18 $100&#039;s, and 3 $20&#039;s.&nbsp; Not a single $100 appeared to floresce with my UV light.&nbsp; All three $20&#039;s floresced, but two of them were orange, the third was green.&nbsp; I figured I couldn&#039;t have possibly gotten 18 counterfeit bills at once from a bank so I take my money and leave.</p><p><br /></p><p>In a pitch black room, the one $20 is bright green and the other 2 are dull orange, almost like the $10.&nbsp; The strips do say 20 on them and while they are not close in serial number, they are 2001&#039;s.</p><p><br /></p><p>In the pitch black, I still got absolutely no florescence from the $100 bills.&nbsp; It was really strange since I could easily see every other denomination just fine (except for the $20&#039;s with the orange threads).</p><p><br /></p><p>I&#039;m assuming that wavelength range on my pen light is just too broad, but then the question arises, where can one get a good pen light to do a quick check on money as they recieve it.[/QUOTE]</p><p><br /></p>

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