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Influence of Adhesive Force of Lifter on the Quality of Powdered Fingermark

리프터의 점착력이 분말 처리된 지문의 품질에 미치는 영향

  • 최고운 (순천향대학교 법과학대학원) ;
  • 황윤정 (순천향대학교 법과학대학원) ;
  • 김채원 (순천향대학교 법과학대학원) ;
  • 유제설 (순천향대학교 법과학대학원)
  • Received : 2019.02.14
  • Accepted : 2019.04.08
  • Published : 2019.05.28

Abstract

The purpose of this study was to observe the influence of adhesive force of lifter on powdered fingermark. First, an experiment was conducted to measure the adhesive force of five kinds of lifters. Second, each fingermark deposited on slide glass was developed using four kinds of powders. Then, these were transferred to lifter, and the quality of the transferred fingermark was observed. As a result of measuring the adhesive force of the lifter using the ASTM D3121-17 rolling ball tack method, the difference in adhesion between the lifters except the gelatin lifter was small. Also, it was confirmed that the quality of the transferred fingermark was not significantly related to the adhesive force of the lifter. However, if the quality of the transferred fingermark is not good when transferring to a gelatin lifter which is a lifter having a weak adhesive force, additional transfer is possible.

Keywords

Lifting Method;Lifter;Fingerprint Lifter;Adhesion

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그림 1. 실험에 사용한 리프터

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그림 2. 리프터의 점착력 측정을 위한 Rolling ball tack실험대

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그림 3. 리프터로 전사한 분말 처리 지문

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그림 4. 1차 전사한 분말 처리 지문과 2차 전사한 분말 처리지문

표 1. Home Office grading system

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표 2. UC scale grading system

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표 3. 리프터의 점착력 측정 결과

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표 4. Home Office grading system으로 평가한 점수 평균값

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표 5. UC Scale grading system으로 평가한 점수의 평균값

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Acknowledgement

Supported by : 순천향대학교

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