sheila verdell (Unregistered Guest)
Posted From: 76-203-255-124.lightspeed.livnmi.sbcglobal.net
|Posted on Wednesday, April 15, 2009 - 07:29 pm: ||
My name is Sheila V. I am a Forensic Science student. QUESTION??? How can a fingerprint be lifted from duct tape?
I used a wet powder solution, letting it set for 15 seconds. I photographed it, now how can it be lifted. My response to the instructor it could not be lifted. PLEASE RESPOND!!!
|Posted on Tuesday, September 23, 2003 - 04:13 pm: ||
Have you tried the product "UN-DO"....it works without interfering with your processing.
|Posted on Friday, October 04, 2002 - 03:57 pm: ||
Another simple and cost-effective method we use is a can of "Dust-Off" compressed air used to clean dust or dirt particles from camera lenses etc.
Just hold the can upside down and spray your exhibit, which will freeze it and allow you to pull apart the tape.
|Posted on Monday, September 23, 2002 - 06:41 pm: ||
Christine, I agree with Lonnette, however at the Pinellas County Sheriff's Office, we have found that liquid nitrogen is the best freezing method. Generally, the normal freezer does not get cold enough to effectively separate most tapes that are substantially bound. There is a component spray you can buy that reaches temperature around 30 below "0" that works reasonably well also. There are a number of chemicals and steam methods that we have tried, but our experiments have found that freezing does the least destruction to both the organic and inorganic constiuents that "naturally" occur in print residues.
|Posted on Tuesday, September 17, 2002 - 03:21 am: ||
Christine, try freezing the tape. Makes it easier to pull apart. Good Luck!
|Posted on Wednesday, September 11, 2002 - 10:17 pm: ||
You have a waded piece of duct tape that has finger prints. How can you unroll the duct tape without ruining the finger prints?