502胶简易加热熏显法

A Simple Method to Visualize On-site Fingerprints with Fumigation from Heating Cyanoacrylate

502胶熏显技术被广泛用于手印检验实践中,然而有时因为现场遗留手印的客体结构、形态、位置复杂多样,使得常用的502胶熏显方法应用受到限制。本文介绍一种通过实践研究总结出的502胶熏显现场汗液手印的方法:在对客体进行密封包装的同时使用简便的方法对502胶进行现场加热来熏显客体上的手印。该方法灵活性强、熏显速度快、效果好,适用于熏显现场上诸如仪器设备、家具电器、栏杆、车内固定部件等形态结构复杂的非渗透性客体上的汗潜手印。

Cyanoacrylate （commonly known as 502 glue） is widely used to develop fingerprints with fumigation from its heating vapor. However, the on-site left fingerprints frequently bring forth limitations to this handling when the fingerprint-carrying objects are amorphous and/or diverse of structure, shape and position. This paper introduces a method to visualize the on-site sweaty fingerprints through fumigation by heating cyanoacrylate. While a plastic bag is to seal the object that deposits ？ngerprints, the cyanoacrylate adds into a metal box that has been bound into the plastic bag and heated afterwards, making the 502 glue vaporize so that the latent fingerprints undergo fumigation to display. This method is flexible, efficient and applicable to expose the fingerprints on such impermeable objects of different and complex shapes as appliances, furniture, electrical devices, handrails and the interior parts of vehicle.