진공 Cyanoacrylate 훈증에 의한 잠재지문의 현출개선
Development of Latent Fingerprints by Cyanoacrylate Fuming in Vaccum Chamber
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초록
비다공성 증거물에서의 잠재지문 현출법으로 사용되는 현출법중 Cyanoacrylate fuming법은 비교적 양호한 지문을 현출할 수 있는 장점으로 많이 사용되고 있으나 사용챔버로의 계속적인 수분 공급으로 인해 지문융선에 과도한 백화현상이 발생하기에 매우 신중하고 주의깊게 현출하여야 하는 방법이다. 본 연구에서는 비다공성 증거물중 분말법으로 현출효율이 낮아 CA법을 사용하고 있는 PVC, PVA, Polypropylene을 증거물로 선정하여 일반 CA챔버와 밀폐 상태인 진공챔버에서 비교 실험한 결과, 진공 챔버에서의 현출효율이 1.6~5배의 우수한 현출효과를 나타내는 것을 알 수 있었다.
Abstract
Cyanoacrylate fuming is one of the common method to use including powder method; however, the continuing supply of water as initiator in the heating CA chamber can cause over-development. In this study, nonporous surfaces made from polyvinyl chloride(PVC), polyvinyl acetate(PVA) and polypropyene were studied. By comparing the results of fingerprints detectability between vacuum method in CA fuming chamber and heating method in CA fuming chamber, vacuuming CA chamber showed 2 times better detectability than heating CA fuming. Lowering CA vaporization point by vacuuming CA chamber might help to have better detectability.
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