黑色磁性粉末的优化  

Optimization of Black Magnetic Powder

作　　者：王珺 刘丽[1] Wang Jun;Liu Li(China Criminal Police Academy,Shenyang Liaoning 110035)

机构地区：[1]中国刑事警察学院,辽宁沈阳110035

出　　处：《云南化工》2020年第11期24-26,30,共4页Yunnan Chemical Technology

摘　　要：粉末法是一线技术人员对现场指纹初步勘察和勘验过程中最常用的方法之一。通过对配粉(碳粉)的目数、载粉(铁粉)与配粉的比例进行优化提高手印的显现效果。探究了遗留时间为1、3、7、14d的潜指印的显现效果,并将其与常规黑色磁性粉末进行比较。结果表明,优化后的粉末显现指纹的纹线流畅,细节特征反映明显,对于遗留时间14d的陈旧指印,该粉末也能取得良好的显现效果。优化后的黑色磁性粉末拓宽了普通黑色磁性粉末的适用范围,具有较好的推广应用前景。powder method is one of the most commonly used methods in the preliminary investigation and inspection of fingerprint in the field. By optimizing the mesh number of powder( toner),the ratio of powder( iron powder) to powder,the effect of handprint is improved. A latent fingerprint with a residual time of 1 d、3 d、7 d、14 d was studied and compared with conventional black magnetic powder. Experimental results show that the optimized powder has smooth lines and obvious detailed features. For the old fingerprint with 14 d left over time,the powder can also achieve good results. The optimized black magnetic powder broadens the common The application range of black magnetic powder has a good prospect of popularization and application.

关 键 词：磁性粉末 手印显现 汗潜手印 

分 类 号：D918.2[政治法律—法学]