과학수사 증거물로서 섬유 비교를 위한 섬유단면의 제조방법
Manufacturing Method of Fiber Cross Sections for the Comparison of Fibers as Forensic Evidence
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과학수사 증거물로서 섬유는 사건·사고에서 관련성을 입증하는데 유용하게 활용되고 있으나섬유 비교를 위하여 알려진 대부분의 단면 제조방법은 매우 작은 단일 섬유에는 적용하기 어려운 실정으로 이번 연구를 통하여 이를 극복할 수 있는 두 가지의 단면제조법을 확립하였다. 첫째 방법은 섬유를 폴리에틸렌필름 사이에 넣고 열을 가하여 고정시킨 후 바이스를 이용하여 섬유가 수직이 되도록세우고 저배율 실체현미경 하에서 섬유의 단면을 보면서 얇게 절단하는 핸드기술법이다. 또 하나는 섬유가 고정된 폴리에틸렌필름을 조직카세트에 고정한 후에 왁스 용액을 가하여 응고시킨 다음 절단하는 마이크로톰법이다. 이 두 방법은 폴리에틸렌필름에 섬유를 고정함으로써 긴 섬유처럼 활용이 가능하였고, 핸드기술법은 섬유의 단면을 보면서 절단함으로써 기존의 방법보다 얇고 재현성 있는 단면제조가 가능하였다. 그리고 마이크로톰법은 섬유의 위치를 표시함으로써 기존의 방법으로는 적용하기 어려웠던 매우 작은 섬유라도 단면제조가 가능하였다.
Abstract
As evidence of scientific investigation, fibers have been used to link their relevance in incidents or accidents, but most of the cross-sectioning methods known for fiber comparisons are difficult to apply for a very short length of fiber. Through this study, we have established two cross-sectioning methods to overcome this drawback. The first method is a hand technique in which a fiber is placed between polyethylene films, fixed with heat, set up vertically using a vise, and cut thinly while viewing the edge of the fiber under a low power stereomicroscope. The other is a microtome method in which a polyethylene film fixed with a fiber is placed on a tissue cassette set, and then a wax solution is added to coagulate and then cut. In these two methods, a short fiber can be used as a long one by fixing the fiber to the polyethylene films. In the hand technique, it is possible to obtain a thin cross-sectioning fiber reproducibly by cutting the fiber while viewing the end section of the fiber. Microtome method is able to make a fiber cross section with a very short fiber which is difficult to apply by the conventional method.
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