An Evaluation of a Novel One-step Fluorescent ... - Onin.com

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Background*• In May 1979, L.W. Wood, from Police Headquarters in Northampton,UK, noticed his prints developing on a film tank that had beenrepaired with cyanoacrylate glue• In 1980, scientists with the Home Office Central ResearchEstablishment found it to be a promising technique• In mid-1980, Louis Bourdon (Ontario, Canada) applied for patents inboth Canada and the United States for using cyanoacrylates fordeveloping latent prints• U.S. Patent 4,297,383 was issued on October 27, 1981• Patent claim successfully challenged by U.S. Army JAG*Source: http://onin.com/U.S. Department ofHomeland SecurityUnited StatesSecret ServiceRobert Ramotowski 26 July 20126
Background – Acceleration Methods• Chemical methods for accelerating the CA fuming process weresuggested by Kendall and Rehn in 1982, including amines, esters,and ethers• Sodium hydroxide/cotton recommended in 1982 by Kendall and Rehn• Olenik suggested using heat in 1983• Sodium carbonate was recommended by Martingale in 1983• Sampson recommended d sawdust in 1984• Cyanoacrylate “gel” (Hard Evidence) reported in 1984U.S. Department ofHomeland SecurityUnited StatesSecret ServiceRobert Ramotowski 26 July 20127
Page 1 and 2: An Evaluation of a Novel One-stepFl
Page 3 and 4: BackgroundU.S. Department ofHomelan
Page 8 and 9: CyanoacrylateFuming MechanismU.S. D
Page 10 and 11: Mechanism• Reaction is less effec
Page 12 and 13: Previous One Step Colored orFluores
Page 14 and 15: Early Efforts - Alaska/3M• Weaver
Page 16 and 17: Early Efforts - BKA• Gros, Spring
Page 18 and 19: Evaluation of the Poly CyanoUV One-
Page 20 and 21: Materials andMethods hdU.S. Departm
Page 22 and 23: Materials - Dye Stain FormulationsA
Page 24 and 25: Method - MVC 1000• Eccrine- & seb
Page 26 and 27: Method - MVC 1000• Modified MVC 1
Page 28 and 29: Method - MVC 3000• Standard MVC 3
Page 30 and 31: Results - Ardrox• Three week old
Page 32 and 33: Results - MBD• Two week old sebac
Page 34 and 35: Results - Rhodamine 6G• Three wee
Page 36 and 37: Results - RAM• Two week old sebac
Page 38 and 39: DiscussionU.S. Department ofHomelan
Page 40 and 41: Discussion - Health & Safety• HCN
Page 42 and 43: Acknowledgements• William Hahn, S

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