----- Original Message ----- From: "Steven Staggs" <staggs@xxxxxx> To: "List for Photo/Imaging Educators - Professionals - Students" <photoforum@xxxxxxxxxxxxxxxxxxxxxx> Sent: Tuesday, October 12, 2004 12:22 Subject: Detecting flammable liquid residue using UV : Fellow list members-- : : I have heard of articles that have made mention of using a UV light source : to cause flammable liquid residue to fluoresce. Can any of you provide me : with any information on detecting flammable liquid residue using UV? : : Also, where can I get more in-depth information on photographing under UV : light? not sure that all flamables fluoresce (alcohol won't) but many hydrocarbons do. The florescence is often overwhelmed by either the ambient light or the response to the reflected UV or near UV so the trick is to illuminate with UV and view the reflected light through a yellow filter - of course the fluorescence may not always been in that particular part of the spectrum but since the yellow kills off the blue/purple/UV you stand a chance of seeing the results. k
