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Related Experiment Videos

Deciphering indented impressions on plastic.

Sharon Brown1, Asne Klein, Alan Chaikovsky

  • 1Questioned Documents Laboratory, Division of Identification and Forensic Science, Israel Police, National Headquarters, Jerusalem 91906, Israel.

Journal of Forensic Sciences
|July 25, 2003
PubMed
Summary
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Forensic document examiners can decipher erased or faded writing on documents using specialized light sources. This technique was successfully used to reveal indented impressions on a plastic credit card holder, linking it to a stolen credit card.

Area of Science:

  • Forensic Science
  • Document Examination
  • Forensic Chemistry

Background:

  • Questioned document laboratories frequently analyze illegible writing due to erasure, obliteration, or fading.
  • Ink remnants can be visualized through luminescence or absorbance using various light sources.
  • Forensic analysis aids in recovering otherwise lost textual information.

Purpose of the Study:

  • To describe a case involving the decipherment of indented impressions on a plastic credit card holder.
  • To establish a link between the plastic holder and a stolen credit card.
  • To demonstrate the utility of forensic techniques in recovering latent information.

Main Methods:

  • Examination of a plastic credit card holder using specialized light sources to visualize latent writing.

Related Experiment Videos

  • Application of methods from the toolmarks and materials laboratory.
  • Utilizing techniques from the photography laboratory for image enhancement.
  • Deciphering indented impressions on a clear plastic substrate.

    • Main Results:

    • Indented impressions from a credit card were successfully deciphered on the plastic holder.
    • Sufficient detail was recovered to establish a connection between the holder and the stolen credit card.
    • The forensic examination proved effective in recovering crucial evidence.

    Conclusions:

    • Specialized lighting and forensic laboratory techniques can recover significant information from indented impressions on plastic.
    • This method is valuable for connecting evidence in criminal investigations, such as credit card theft.
    • Forensic document examination plays a critical role in modern criminalistics.