Given B W
J Forensic Sci. 1976 Jul;21(3):587-94.
The effects of time and detonation on latent fingerprints from cartridges and cartridge castings were explored. Time alone did not appear to seriously degrade latent fingerprint quality over the three-week period of experimental trials. The greatest effect of detonation seemed to stem from hot gaseous blowback on the external surface of the cartridge casings. Nickel-plated casings, because of their greater chemical resistance and more polished surface, were found less satisfactory as a substrate for latent impressions than brass casings. An interesting technique for development and permanent preservation of latent fingerprint impressions on castridge casings was also described.
研究了时间和爆炸对弹药筒及弹药筒铸件上潜在指纹的影响。在为期三周的实验过程中，仅时间因素似乎并未严重降低潜在指纹的质量。爆炸的最大影响似乎源于热气体对弹壳外表面的反吹。由于镀镍弹壳具有更强的耐化学性和更光滑的表面，因此发现其作为潜在印记的基材不如黄铜弹壳令人满意。文中还描述了一种用于显影和永久保存弹壳上潜在指纹印记的有趣技术。
