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Video Densitometer

Thin Layer Chromatography (TLC)

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Federal Forensic Associates, Inc.

ATTEMPTED DETERMINATION OF AUTHORSHIP BY BALL PEN LINE CHARACTERISTICS.

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    The correlation between line characteristics and physical positioning of the pen is evaluated with the goal of determining the author of the writing. Line characteristics such as density, width and the presence of the anomalies, such as splitting and blobbing were noted and measured relative to writing angle and point load. Results suggest that the extreme variation which exists between writing instruments will prevent use of these techniques to determine authorship.

By A.H. Lyter III, J.J. Harris and B.R. Greenwood

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