과학수사 증거물로서 의심 문서상에 기록된 흑색 필기구별 잉크의 광원 특성
Light Source Characteristics of Recorded Black Writing Pen Inks on Questioned Documents as Forensic Evidences
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참고문헌
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초록
본 연구는 흑색 필기구별 발광 특성 및 잉크와 유사한 색상의 종이(흑색)에 유류된 잉크의 식별 가능성을 파악하기 위하여 Video Spectral Comparator (VSC)와 볼펜, 젤펜, 롤러펜, 펠트팁펜 및 만년필 등5종의 흑색 필기구를 사용하였다(154종). 그 결과, 유성 잉크가 함유된 볼펜과 젤펜은 백색 종이에서 UV 광원에 780 nm, 흑색 종이에서는 850 및 780 nm만을 사용하였을 때 잉크의 발광 특성 식별이 가능하였다. 수성 잉크가 함유된 롤러펜, 펠트팁펜, 만년필은 백색 종이에서 UV 광원 725 nm, 흑색 종이에서는 780 nm 만을 사용하였을 때 잉크의 발광 특성 식별이 가능하였으나, 흑색 종이에 기재된 펠트팁펜의 경우 UV 광원에 780 nm를 사용하였을 때 식별 가능하였다. 본 연구를 통하여 흑색 필기구별 잉크 발광 특성의 식별 가능한 파장대를 제시하여 DB로 자료를 구축할 수 있었으며 문서 감정 시 선택적으로 사용하여 잉크 식별에 도움될 것으로 기대된다.
Abstract
In this study was conducted to identify the luminescence characteristics of black writing pen inks. Then, check wavelength identified ink on similar color paper (black). The material used a video spectral comparator (VSC) and a total of 154 black writing pen (ballpoint pen, gel pen, rollerball pen, fiber-tip pen and fountain pen). As a result, ballpoint pen and gel pen with oil ink were able to identify luminescence characteristics when using UV light source with 780 nm on A4 white paper and 850, 780 nm on black color paper. Rollerball pen, fiber-tip pen and fountain pen with liquid ink were able to identify luminescence characteristics using UV light source with 725 nm on A4 white paper and 780nm on black color paper. But, fiber-tip pen could be checked when using UV light source with 780 nm on black color paper. This data was able to present wavelength to identify the luminescence characteristics of black writing pen ink on papers (white, black). It is expect helpful evaluate writing ink on questioned documents using a non-destructive method.
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