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"blacklights" found in pet stores, don't work for me
In article , "Jean B." wrote:
OK then, DougD is really on to something and I need to find out the proper wavelength. Quick research on the web finds that the "Urine- off" brand UV light, does advertise that it has the proper wavelength, OK I will try it. Thanks Doug! This is a timely discussion for me, so thanks for starting the thread. My one attempt to locate cat urine using a blacklight was unsuccessful, and now I know why. I will also have to get the above mentioned kind, which I suppose is not in pet stores.... I can smell the cat pee, but I can't pinpoint it precisely.... One thing that may be possible, is to spray something more conventional on the area's that are suspect, and the combination of urine and a second material could cause it to flouresce under the cheaper party light type UV lamps. Something with phosphorus in it like laundry soap may work, I'll try and do some experiments as it would be a heck of a lot easier and cheaper than having to hunt down a specific lamp type. The other thing is possibly stealing a trick from the CSI folks.. The reason the cheap lamps don't work isn't nesc. because they aren't causing the urine to glow, it's just that it's a weak flourescense compared to the broad UV of the cheap lamp. By looking for the stain's under something like orange colored glasses, it would cut down on the amount of black (er.. blue) light in the visible, while allowing the shifted light from the stain which would appear in the yellow wavelengths to pass through and be seen. Again, it might be a long shot, but that IS how the UV light is used for spotting fingerprints, the oils in the print glow yellow under the UV. Even bright green from a YAG laser can light up the prints, but that's an awful lot of light!! d. |
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