手印相纸转印显现法的研发与应用

Research and Application of the Development Method of Transfer Fingerprint to Photographic Paper

目的在现有手印转印显现法研究基础上进行改进创新,找到一种操作简便快捷、适用手印种类和客体更广泛、更方便于在勘查现场实施的新型方法。方法选择滤纸、胶带、相纸分别作为转印载体针对非渗透性客体上手印进行转印显现提取,对比选择出效果较好的转印载体,并检验其应用条件和效果。结果研究出新型手印转印显现方法——相纸转印显现法。结论将3%的茚三酮丙酮溶液浸润的相纸贴附于客体之上,静置5~30 min后可实现对潜在手印的转印显现提取。该方法对透明硬塑料、漆面、锡箔纸、铝合金、不锈钢、瓷砖、玻璃等非渗透性光滑客体上多种遗留条件的多种物质手印均有较好的转印显现效果。

Objective To improve the existing fingerprint transfer development method and find a new method that is more convenient to operate on the survey site.Methods Filter paper,tape and photographic paper are respectively used as the carrier for transfer printing.Selecting the best effect and testing the application result.Results A new type of method to transfer fingerprint is discovered-the development method of transfer fingerprint to photographic paper.Conclusions The photographic paper adsorbed with 3%solution of ninhydrin acetone is attached to the object,and after standing for 5-30 minutes,transferable and extraction of the latent fingerprint was achieved.This method has a better transfer impression effect on fingerprints on impermeable objects.