Laser Detection of Latent Fingerprints: Difficult Surfaces

    Volume 30, Issue 2 (April 1985)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Page Count: 7


    Roland Menzel, E
    Director, Center for Forensic Studies, Texas Tech University, Lubbock, TX

    Burt, JA
    Laboratory assistant, Texas Tech University, Lubbock, TX

    (Received 6 August 1984; accepted 24 September 1984)

    Abstract

    Fingerprint development techniques that use blue-green laser light suffer from high background fluorescence on substrates such as cardboard, wood, leather, and some metals and plastics. These substrates tend to exhibit little or no fluorescence under ultraviolet light, prompting us to search for procedures that yield visible fluorescence under this illumination. Specifically, chemical development with dansyl chloride and vapor staining with 9-methylanthracene were found to be useful when dealing with these substrates. Fluorescence excitation was possible either with an ultraviolet lamp or an argon-ion laser operating in the ultraviolet. Coumarin 535 vapor staining following 9-methylanthracene staining was also found effective.


    Paper ID: JFS11815J

    DOI: 10.1520/JFS11815J

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    Author
    Title Laser Detection of Latent Fingerprints: Difficult Surfaces
    Symposium , 0000-00-00
    Committee E30