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|Surface Used On:
Light-colored tape surfaces.
Sebaceous & lipid components.
Development Complete When:
Source of Error:
(Not necessarily in this order.)
Abridged Reagent Sequence
*** Sticky-Side Powder ***
STICKY-SIDE POWDER FORMULA:|
1. Place 1 teaspoon of powder in a shallow jar or mixing bowl. 2. Equal parts of Photo-Flow 200 and water are mixed with the powder to form a THIN paste/paint.PROCEDURE OF APPLICATION
1. Brush this mixture with a camel hair brush onto the tape's adhesive surface. 2. Wait 10 to 15 seconds. 3. Rinse under a gentle stream of running cold tap water. 4. Allow tape to air dry. 5. Photograph any developed ridge detail.
Ridge Detail Visualized by:
Visible chemical/stain reaction.
Adhesive tape surfaces
Other Chemical Name(s):
Working Solution Shelf-life:
Prepared as needed.
The reagent is a suspension of black powder in a detergent solution and is prepared as a paste. After preparation, the mixture is brushed unto the adhesive sides of tape surfaces. This reagent is considered to be economical as a adhesive-tape processing methods. Cyanoacrylate fuming does not inhibit the use of this reagent.
Commercial kits are available which contain all the necessary components and implements. The reagent may be mixed vigorously to create a foam solution. The reagent may be repeatedly applied, if necessary, to improve the friction ridge detail.
Supporting Reference Materials:|
1. "Sticky-side Powder Versus Gentian Violet: The Search for the Superior Method for Processing the Sticky Side of Adhesive Tape", Jor. Forensic Identification, vol. 46, no. 3, May/June 1996, pp. 268-272.
2. "Chemical Formulas and Processing Guide for Developing Latent Prints", U.S. Dept. of Justice, pg. 47-48, 1994.
3. "Sticky Side Powder: The Japanese Solution", D.S. Burns, Jor. Forensic Identification, vol. 44, no. 2, Mar./April 1994, pp. 133-138.
4. Manual of Fingerprint Development Techniques 2nd. Ed., Home Office - Police Scientific Development Branch, White Crescent Press, Ltd., Luton, England, 2001.
5. Fingerprints and Other Ridge Skin Impressions, C. Champod, C. Lennard, P. Margot, and M. Stoilovic, CRC Press LLC, Boca Raton, FL., 2004, pp. 161-162, pg. 240.
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