摘要
目的解决金属铜表面油潜手印显现技术难题,进一步丰富手印显现的技术方法和理论体系。方法通过电化学方法,利用金属离子在阴极表面的还原反应,研究了瓦特镀镍体系中金属铜表面油潜手印的显现工艺。结果利用金属铜基体与金属镍镀层存在的明显色差可以清晰显出金属铜表面的油潜手印,显出的手印细节特征清晰,符合检验鉴定工作的需要。结论在瓦特镀镍体系中,控制阴极电流密度为2.5 A/dm^2,电解时间为300 s是比较适宜的显现工艺参数,可应用于实际工作中金属铜表面油潜手印显现。
Objective To solve the problem of visualizing latent oil fingerprints on copper,and enrich the technical methods and theory of latent fingerprint development. Method The watt nickel plating was studied utilizing the reduction reaction of metal ion on cathode. Results The latent oil fingerprints could be developed clearly, as there was obvious color contrast between copper and nickel. The quality of developed fingerprints meets the requirements of inspection and identification. Conclusion Electrolysis with cathode current density of 2.5A/dm2 for 300s was proved to be suitable in watt nickel plating. The method can be applied in forensic practice.
出处
《中国司法鉴定》
2018年第1期87-89,共3页
Chinese Journal of Forensic Sciences
基金
上海市刑事科学技术研究院现场物证重点实验室开放课题(2014XCWZK10)
关键词
镀镍
油质潜手印
电流密度
电解时间
nickel plating
latent oil fingerprint
current density
electrolysis time
