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Suzuki M, Akiba N, Kurosawa K, et al. Differentiation of black writing ink on paper using luminescence lifetime by time-resolved luminescence spectroscopy. Forensic Sci Int. 2017;279:281-287doi: 10.1016/j.forsciint.2017.09.003.
Suzuki, M., Akiba, N., Kurosawa, K., Akao, Y., & Higashikawa, Y. (2017). Differentiation of black writing ink on paper using luminescence lifetime by time-resolved luminescence spectroscopy. Forensic science international, 279281-287. https://doi.org/10.1016/j.forsciint.2017.09.003
Suzuki, Mototsugu, et al. "Differentiation of black writing ink on paper using luminescence lifetime by time-resolved luminescence spectroscopy." Forensic science international vol. 279 (2017): 281-287. doi: https://doi.org/10.1016/j.forsciint.2017.09.003
Suzuki M, Akiba N, Kurosawa K, Akao Y, Higashikawa Y. Differentiation of black writing ink on paper using luminescence lifetime by time-resolved luminescence spectroscopy. Forensic Sci Int. 2017 Oct;279:281-287. doi: 10.1016/j.forsciint.2017.09.003. Epub 2017 Sep 11. PMID: 28938198.
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Forensic Sci Int. 2017 Oct;279:281-287. doi: 10.1016/j.forsciint.2017.09.003. Epub 2017 Sep 11.

Differentiation of black writing ink on paper using luminescence lifetime by time-resolved luminescence spectroscopy.

Forensic science international

Mototsugu Suzuki, Norimitsu Akiba, Kenji Kurosawa, Yoshinori Akao, Yoshiyasu Higashikawa

Affiliations

  1. Forensic Science Laboratory, Metropolitan Police Department, 2-1-1, Kasumigaseki, Chiyoda-ku, Tokyo 100-8929, Japan. Electronic address: [email protected].
  2. National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan.

PMID: 28938198 DOI: 10.1016/j.forsciint.2017.09.003

Abstract

The time-resolved luminescence spectra and the lifetimes of eighteen black writing inks were measured to differentiate pen ink on altered documents. The spectra and lifetimes depended on the samples. About half of the samples only exhibited short-lived luminescence components on the nanosecond time scale. On the other hand, the other samples exhibited short- and long-lived components on the microsecond time scale. The samples could be classified into fifteen groups based on the luminescence spectra and dynamics. Therefore, luminescence lifetime can be used for the differentiation of writing inks, and luminescence lifetime imaging can be applied for the examination of altered documents.

Copyright © 2017 Elsevier B.V. All rights reserved.

Keywords: Document examination; Forensic science; Luminescence lifetime; Pulse laser; Writing ink

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