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| Chemical Name: LIQUI-DROX |
Surface Used On: Dark colored tapes, adhesive & non-adhesive sides. |
Sensitive To: Cyanoacrylate deposit. |
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Reagent Characteristics Development Complete When: Source of Error: Incompatibilities: Precautions: Storage Container: Safety: Recommendations: Similar Reagents Sequential Reagents (Not necessarily in this order.) Abridged Reagent Sequence | Forensic Light | Cyanoacrylate fuming | *** Liqui-Drox *** | Ultra-violet lamp | R.A.M. | Forensic Light |
LIQUI-DROX FORMULA:200 ml Ardrox P-133D 400 ml Liqui-Nox 400 ml distilled water Combine and stir the chemicals thoroughly. A thick milky-yellow solution should result.PROCEDURE OF APPLICATION 1. Using a camel hair brush, apply the reagent onto both sides of the tape until a lather is produced. 2. Wait approximately 10 seconds. 3. Rinse under a gentle stream of cold tap water. 4. Allow the tape to air dry. 5. View under a Forensic Light Source or Ultra-Violet lamp able to produce a long-wave ultra-violet light output. Use ultra-violet protection, yellow or orange colored goggles. 6. Photograph results using an ultra-violet blocking 2A filter. |
Ridge Detail Visualized by: Ultra-violet light induced. Reagent Applicabilities: Non-Porous surfaces Post-Cyanoacrylate Tape technique Other Chemical Name(s): None Working Solution Shelf-life: Six (6) months. |
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Process Summary: Effective for dark-colored adhesive tapes, the Liqui-Drox method is a post-cyanoacrylate process involving brushing the reagent unto tape, rinsing, then viewing the result under long-wave ultra-violet light. This reagent is composed of a mixute of a fluorescent agent, a detergent and water. | ||||||||||||
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Accepted Deviations: | ||||||||||||
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Supporting Reference Materials: 1. Minutiae Magazine, Summer Special 1994, Issue No. 24, pg.7. 2. "Chemical Formulas and Processing Guide for Developing Latent Prints", U.S. Dept. of Justice, pg. 47-48, 1994. 3. Hollars, M., Trozzi, T., and Barron, B., "Development of Latent Fingerprints on Dark Colored Sticky Surfaces Using Liqui-Drox", Jor. Forensic Identification, Vol. 50, No. 4, July/Aug 2000, pp. 357-362. | ||||||||||||
[ Return to: Main Page || Non-Porous Surfaces || Fluorescent Techniques || Ultra-violet Induced || Post-cyanoacrylate || Tape Surfaces ]