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Writing impressions revealed by scanners

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Abstract

Heavily impressed writing impressions in paper and impressions in glossy brochures are often difficult or impossible to develop using the electrostatic detection apparatus (ESDA, manufactured by Foster and Freeman). Oblique and specular reflectance lighting can be used but they are time-consuming techniques and not always very successful. This paper briefly describes a scanning and image-processing method for producing excellent images of such writing impressions.

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Notes

  1. Electrostatic Detection Apparatus (ESDA) manufactured by Foster and Freeman Ltd, 25 Swan Lane, Evesham, Worcestershire, WR11 4PE, UK.

Reference

  1. Ellen DM, Foster DJ, Marantz DJ. Use of electrostatic imaging in the detection of indented impressions. Forensic Sci Int 1980;15:53–60.

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Acknowledgments

Comments and assistance on this work and manuscript by staff of Forensic Document Services are gratefully acknowledged.

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Authors and Affiliations

  1. Forensic Document Services Pty Ltd, PO Box 545, Fyshwick, ACT 2609, Australia

    Steven J. Strach

Authors
  1. Steven J. Strach
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Corresponding author

Correspondence to Steven J. Strach.

Additional information

Part of a paper presented at the 18th International Symposium on the Forensic Sciences organised by the Australian and New Zealand Forensic Science Society, Fremantle, WA, Australia, 2–7 April 2006

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Strach, S.J. Writing impressions revealed by scanners. Forensic Sci Med Pathol 3, 210–216 (2007). https://doi.org/10.1007/s12024-007-0015-4

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  • DOI: https://doi.org/10.1007/s12024-007-0015-4

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