三种不同胶水熏显手印的比较

Contrast of Three Different Cyanoacrylate Fuming Methods

胶水熏显法是显现手印的主要方法之一,目前现场勘查实践中所使用的胶水基本上局限于“502”胶(氰基丙烯酸乙酯)。实际上,许多其他氰基丙烯酸酯也可以用于显现手印。不同的胶水可能具有不同的显现效果。实验显示:“502”胶和“504”胶(氰基丙烯酸丁酯)对于玻璃表面手印的显现效果相当。通常情况下,对玻璃上遗留时间较长的手印,“415”胶和“502”胶(氰基丙烯酸乙酯)显现效果均较好。对于铝箔表面上的新鲜和稍陈旧手印,“502”胶是最佳选择。对于铝箔表面上遗留时间较长的手印,“504”胶的显现效果最好。对于塑料片表面,新鲜手印的最佳选择是“502”胶,稍陈旧和陈旧手印均是“504”胶显现效果最好。

The cyanoacrylate fuming method is one of the primary techniques for developing fingerprints.The cyanoacrylate used in the crime scene investigation is almost limited to"502"(ethyl cyanoacrylate).Actually,many other cyanoacrylates can be used for this purpose.Experiments show that"502"and"504"(n-butyl cyanoacrylate)have the same effect on the development of fingerprints on glass surface.Usually,"415"and"502"(ethyl cyanoacrylate)have better effect on the development of fingerprints left on the surface of glass for a long time.For fresh and slightly obsolete fingerprints on the surface of aluminum foil,"502"is the best choice."504"has the best effect on the fingerprints left on the surface of aluminum foil for a long time.For the surface of plastic sheets,the best choice of developing fresh fingerprints is"502",the best choice of developing slightly obsolete and obsolete fingerprints is"504".