高压静电法显现金属表面汗潜手印

Development of fingerprints on metal surface by high voltage electrostatic method

目的建立一种加载高压静电法,提高金属表面手印显现效果。方法利用自行设计的静电加载设备,在常见金属客体表面分别遗留1、3、7、15d的手印,分别用静电加载和普通磁性粉进行显现。结果高压静电法显现金属表面汗潜指印效果均有明显的提高。结论该方法现场操作性强,简便有效。

Objective To establish high voltage electrostatic method for development of fingerprints on metal surface. Methods The fingerprints on brass, iron, aluminum and stainless steel were developed with high voltage electrostatic method after they were left 1 day, 3 days, 7 days and 15 days. The results of the magnetic powder method and the high voltage electrostatic method were compared. Results The high voltage electrostatic method is more effective than the magnetic powder method. Conclusion High voltage electrostatic method is simple and effective for development of fingerprints on metal surface.