The Journal of the Korea Contents Association (한국콘텐츠학회논문지)

The Korea Contents Association (한국콘텐츠학회)
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The Factors Influencing Latent Fingermark Development on Adhesive Side of Iron Oxide Powder-based Small Particle Reagent

사삼산화철 기반의 소립자시약(Small Particle Reagent)의 접착면 잠재지문 현출 효과에 영향을 미치는 요인

  • 김선민 (순천향대학교 법과학대학원) ;
  • 고강석 (순천향대학교 법과학대학원) ;
  • 이슬비 (순천향대학교 법과학대학원) ;
  • 유제설 (순천향대학교 법과학대학원)
  • Received : 2016.05.03
  • Accepted : 2016.07.04
  • Published : 2016.08.28
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Abstract

Latent fingerprint left on the adhesive sides of tapes can be easily found at a crime scene. Small Particle Reagents(SPR) based on iron oxide($Fe_3O_4$) is a technique for the detection of a latent fingerprint adhesive surface. In this study, found out that the causes affecting the quality of the fingerprints developed when used SPR based on iron oxide. To a suspension of 0.5g of iron oxide in 100ml of distilled water, 0.5ml or more surfactant were added can be developed latent fingerprints of good quality. In addition, using surfactants HLB(hydrophile-lipophile balance) value of 11~18 showed good contrast to the background and latent fingerprint.

강력범죄사건에서 발견할 수 있는 증거물인 테이프는 접착면에 지문이 쉽게 유류될 수 있다. 청 테이프에 유류된 지문을 현출하고자 사삼산화철($Fe_3O_4$)기반의 Small Particle Reagents(SPR)를 사용하여 SPR의 제조비율 및 현출에 영향을 주는 요인에 대해 연구하였다. SPR이 지문현출에 영향을 주는 요인은 제조시 첨가되는 분말의 양, 계면활성제의 양, 계면활성제의 HLB(hydrophile-lipophile balance)에 의해 영향을 받는다. 증류수 100ml를 기준으로 분말의 양은 0.5g~1.0g일 때 융선에 적절한 양이 흡착되었으며 계면활성제의 양은 0.5ml이상이면 배경에 흡착된 분말들을 잘 씻어냈다. 또한 계면활성제의 HLB가 배경과 융선과의 대조비를 높이는 중요한 요인이었으며 유류된 지문의 지질 성분을 용해시키지 않는 11~18사이의 HLB가 뛰어난 현출력을 보였다.

Keywords

References

  1. A. Zamir, E. Springer and B. Glattstein, "Fingerprints and DNA: STR Typing of DNA Extracted from Adhesive Tape after Processing for Fingerprints," Journal of forensic sciences, Vol.45, No.3, pp.687-688, 2000.
  2. Barry A. J. Fisher and David R. Fisher / 홍성욱, 최용석 역, 현장감식과 수사 CSI, 수사연구사, pp.190-192, 2006.
  3. T. Cuiksza, Enhancement of Latent Fingerprints on Adhesive Tapes with Powder Suspensions and other Processes, HOSDB Student Placement Report, 2007.
  4. E. Alderwick, The Development of Fingerprints on Adhesive Tapes, PSDB Student Placement Report, 2002.
  5. F. Haque, A. D. Westland, J. Milligan and F. M. Kerr, "A Small Particle (Iron Oxide) Suspension for Detection of Latent Fingerprints on Smooth Surfaces," Forensic Science International, Vol.41, pp.73-82, 1989. https://doi.org/10.1016/0379-0738(89)90238-7
  6. A. L. Yeo, Enhancement of Latent Fingerprints on Adhesive tapes, PSDB Student Placement Report, 2000.
  7. D. C. J. MacPhee, Powder Suspensions on Adhesive and Non-Porous Surfaces, HOSDB Student Placement Report, 2008.
  8. P. Kabklang, S. Riengrojpitak, and W. Suwansamrith, "Latent Fingerprint Detection by Various Formulae of SPR on Wet Non-Porous Surfaces," Journal of Scientific Research Chulalongkorn University, Vol.34, No.2, 2009.
  9. N. N. Daeid, S. Carter, and K. Laing, "Comparison of three types of white powder suspensions for the recovery of fingerprints on wetted nonporous surfaces," Journal of Forensic Identification, Vol.58, No.5, pp.590-599, 2008.
  10. M. L. Hollars, T. A. Trozzi, and B. L. Barron, "Development of latent fingerprints on dark colored sticky surfaces using liqui-drox," Journal of Forensic Identification, Vol.50, No.4, pp.357-362, 2000.
  11. N. H. Williams and K. T. Elliott, "Development of latent prints using titanium dioxide ($TiO_2$) in small particle reagent, white (SPR-W) on adhesives," Journal of Forensic Identification, Vol.55, No.3, pp.292-305, 2005.
  12. N. N. Daeid, S. Carter, and K. Laing, "Comparison of vacuum metal deposition and powder suspension for the recovery of fingerprints on wetted nonporous surfaces," Journal of Forensic Identification, Vol.58, No.5, pp.600-613, 2008.
  13. B. J. Jones, A. J. Reynolds, M. Richardson, and V. G. Sears, "Nano-scale composition of commercial white powders for development of latent fingerprints on adhesives," Science and Justice, Vol.50, No.5, pp150-155, 2010. https://doi.org/10.1016/j.scijus.2009.08.001
  14. W. C. Griffin, "Classification of Surface Active Agents by HLB," Journal of the Society of Cosmetic Chemists, Vol.1, pp.311-326, 1949.
  15. W. C. Griffin, "Calculation of HLB values of Nonionic Surfactants," Journal of the Society of Cosmetic Chemists, Vol.5, pp.249-256, 1954.