对硅橡胶法提取特殊物体表面汗潜手印的研究

对于某些特殊物体(球形锁、饮料瓶瓶体等)表面遗留手印的提取、实验发现,利用硅橡胶提取上述特殊物体表面的手印效果很好,而且模型能保持指纹的特征稳定,便于检验鉴定。在提取特殊物体表面的汗潜手印时,胶带纸提取法与硅橡胶提取法相比存在着一些缺陷。用胶带纸法提取的手印在手印的某些部位会出现气泡、乳突纹线中断的现象,影响了指纹特征的再现。而硅橡胶这种物质可以很好地贴合在特殊物体的表面,将手印完整地提取下来。

Study On Collecting the Invisible Sweaty Fingerprint from the Surface of Special Objects by Using Silastic

Experiments show that it is effective to collect the remaining fingerprints from the surface of some special objects(spherical lock,body of drink bottle,ect.) by using silastic.By this method,the model can keep steady the characteristics of the fingerprints and is easy to be tested and identified.Compared with the method of using silatic,when collecting the invisible sweaty fingerprints from the surface of some special objects,the method of using sticky paper has some flaws.There are signs of air bubbles and suspension of friction ridges in certain places of the fingerprints,thus interfering prints while silastic can stick well on the surface of the special objects so as to collect the fingerprint intactly.