Volume 23, Issue 4 (October 1978)

    A Scientific Study of Pencil Lead Components

    (Received 8 November 1977; accepted 3 February 1978)

    Published Online: October

    CODEN: JFSOAD

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    Abstract

    The term “lead” pencil is a misnomer in that the pencil contains no lead but rather is composed of three primary ingredients in varying proportions: graphites, clays, and waxes [1]. Since its introduction during the 16th century, the pencil has become the most widely used writing instrument throughout the world. Americans yearly consume over two billion pencils, with the U.S. government and Bell Telephone System being the largest purchasers. It has been reported that enough pencils are produced every year in the United States to supply every American with one pencil every 40 days.


    Author Information:

    Cantu, AA
    Forensic chemists, Bureau of Alcohol, Tobacco and Firearms, Washington, D.C.,

    Lyter, A
    Forensic chemists, Bureau of Alcohol, Tobacco and Firearms, Washington, D.C.,

    Brunnelle, R
    Forensic chemists, Bureau of Alcohol, Tobacco and Firearms, Washington, D.C.,

    Cain, S
    Document examiner/polygraph examiner, U.S. Secret Service, Washington, D.C.,


    Stock #: JFS10720J

    ISSN: 0022-1198

    DOI: 10.1520/JFS10720J

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    Author
    Title A Scientific Study of Pencil Lead Components
    Symposium , 0000-00-00
    Committee E30