ISSN: 0022-1198
CODEN: JFSCA
Page Count: 17

Classification and Identification of Photocopying Toners by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS): I. Preliminary Results
Lennard, CJ
Assistant, associate professor, and professor, Institut de Police Scientifique et de Criminologie, University of Lausanne,

Margot, PA
Assistant, associate professor, and professor, Institut de Police Scientifique et de Criminologie, University of Lausanne,

Mazzella, WD
Assistant, associate professor, and professor, Institut de Police Scientifique et de Criminologie, University of Lausanne,

(Received 3 March 1990; accepted 7 May 1990)

Abstract

A diffuse reflectance infrared Fourier transform technique is described for the analysis of raw photocopying toners and small samples of toner removed from the surface of a photocopied document. The technique gives reproducible results and makes possible differentiation of toner samples obtained from different photocopying machines. In addition, toners may be classified into a number of groups, based on the presence or absence of certain absorption bands in their diffuse reflectance spectra. Preliminary results indicate the feasibility of a database of infrared spectra for the photocopying toners available on the market. Such a database would be a valuable aid to the document examiner in the increasing number of cases involving photocopies.

Keywords:
questioned documents, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), toners, photocopiers, photocopies, diffuse reflectance, infrared spectroscopy, Fourier transform infrared (FTIR) spectroscopy, criminalisties

Paper ID: JFS13047J
DOI: 10.1520/JFS13047J
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