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Latent Print Examination » Questions from FP Experts for FP Experts... Processing, Testimony, and Technical Matters » Other treatment for Rhodamine stained electrical tape? « Previous Next »

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user
Posted on Thursday, October 28, 2004 - 06:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
Sticky-side powder and WetWop are often effective at developing ridge detail on the non-sticky side of tape.
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Webservant
Posted on Tuesday, October 26, 2004 - 06:37 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
Connie,

After you have tried everything else in your post-cyano processing sequence, do not forget that rubbing the surface with a contrasting color fingerprint powder may visualize ridge detail previously missed.

Mike Grimm and Richard Taylor of the Virginia State Crime Lab in Roanoke published the "powder rubbing" technique 20 years ago in Identification News, Vol 34, No. 3. It has worked in many cases as a post-cyano last step that develops ridge detail.
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Connie
Posted on Monday, October 25, 2004 - 11:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
Greetings!
Does anyone have other processing ideas for black electrical tape that has been previously superglued and Rhodamine dye stained? The ridge detail I am trying to develop is on the glossy and not the sticky side.
Thanks!

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