新型手印提取器的研究

The research on the new fingerprint extractor

现场勘查中,技术人员对用粉末刷显的手印、灰尘加层手印拍照提取后,再用新型手印提取器提取效果更好。手印提取器使胶带与客体接触面积变小、压力均匀,从而避免在提取过程中产生气泡；同时,胶带具有粘性的一面与另一胶带紧密相粘,通过转动,能制成透明的手印检材,可直接通过印相放大、复印,或通过反差较大的衬底做背景进行比对鉴定。实践证明,运用手印提取器提取的手印具有高质量、手印特征反映好、保存时间长,而且在使用中方便简捷,提取速度快等优点。

In the investigation on - scene, it is better for the technician to use the fingerprint extractor after using the powder and dust to take photo. The fingerprint extractor uses the model to make the area smaller and pressure uniformity between the adhesive tape and the objects, which avoid the appearance of the air bubble when we do the extraction. Meanwhile, the viscous of the adhesive tape could stick to another adhesive tape. Through the rotation, we can make the transparent fingerprint material and do the identification through photo enlarge, copy or contrast film. It is proved that the fingerprint extractor has some characteristics of high quality, good reflection, conventional and quickly.