NCJ Number
186089
Journal
International Journal of Forensic Document Examiners Volume: 5 Dated: December/January 1999 Pages: 265-269
Date Published
1999
Length
5 pages
Annotation
This paper describes a simple, conclusive method for the non-destructive examination of forged/counterfeit color xeroxed documents.
Abstract
Four Reynold's ballpoint pens that contained red, blue, black, and green inks were used in the experiments. The examined documents were simulated by drawing the ballpoint pen inks on a xerox paper and xeroxing the same with a Modi Xerox Photocopier machine Model Empress 5750. Toners of three basic colors (red, blue, and yellow) were obtained, and their FTIR spectra were taken. The study shows that Micro-Reflectance Absorbance Fourier Transform Infrared (Micro-RAS FTIR) spectra of the original and forged color documents can provide important information for differentiating xeroxed forged/counterfeit and original documents. On the basis of comparison of Micro-RAS FTIR spectra, the documents that contained color ballpoint pen ink were differentiated from their forged/counterfeit color xerox. This same procedure can be extended to the toners used in other machines to determine the set of peaks common in nature due to the major constituent polymer binders or thermosetting resins present in toners used in those machines. 10 figures and 21 references