(Received 26 July 1981; accepted 21 September 1981)
Published Online: April
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The carbon copy document is one form of physical evidence that has not received much attention. Although the classical techniques employed to differentiate typewritten documents are often adequate to differentiate carbon copies, the following work suggests an additional technique. Thin-layer chromatography has been used to differentiate many color-containing mixtures, and its usefulness in differentiating carbon paper impressions is discussed.
Forensic chemist, Bureau of Alcohol, Tobacco, and Firearms, U.S. Treasary Rockville, MD
Student at Northeastern University, Boston, MA
Stock #: JFS11498J