蔡立红, 袁兆锋. 仿生指纹膜及印章膜的印痕检验[J]. 刑事技术,2016,41(1): 62-64
CAI Lihong, YUAN Zhaofeng. Impression Examination of Bionic Fingerprint Membrane and Seal Membrane[J]. Forensic Science and Technology,2016,41(1): 62-64
Impression Examination of Bionic Fingerprint Membrane and Seal Membrane
CAI Lihong, YUAN Zhaofeng
Guangdong Police College, Guangzhou 510230,China
Abstract
Objective To study the characteristics of impressions produced with bionic fingerprint membrane and seal membrane and to discuss the examination techniques.Methods Experiments on the bionic fingerprint membrane and seal membrane, both made from silicone material, were designed with red inkpad as the medium and the receipt paper as the displaying object. The fingermarks and seal marks were made along with the obtainment of impressions of fingerprint membrane and seal membrane through the subjects being pressed on displaying objects. The characteristics of the impressions from relevant membrane were observed and compared with the real ones.Results The impression of fingerprint membrane could be identified by comparison of its feature with that of fingermark because fingerprint membrane had shown rough lines, irregular edges, bubbles, inkpad accumulation and no obvious sweat-pore imprints. As for seal membrane impression, it appears rough lines, font details deformation, revealing matrix specifics of the seal membrane itself, inkpad accumulation, bubbles, and relatively wide impression lines.Conclusions For the examination of impressions of fingerprint membrane and seal membrane, it can be carried out based on the following three aspects: their essential features, fabrication traits and distinctions caused from use.
Keyword:
fingerprint membrane; seal membrane; inkpad accumulation
图 1 收据纸上的指印(左)和膜印(右)。A和B:指印和膜印; C:皱纹及汗孔特征放大60倍比较; D:脱皮特征放大60倍比较; E和F:小犁沟痕迹放大60倍比较。)Fig.1 Impressions of fingerprint (left) and fingerprint membrane (right) on receipt paper. A& B: Impressions of fingerprint and fingerprint membrane; C: Characteristic comparison on the 60x-magnified impression of wrinkle and sweat pore; D: Characteristic comparison on the 60x-magnified impression of decortication; E& F: Characteristic comparison on the 60x-magnified impression of small furrow.
This paper presents the preparation methods of the biomimic membranes,which include the self-assembled approach,LB (Langmuir-Blodgett) technique,graft-modification technique,in-situ polymerization method,cast method,chemical vapor deposition method,and molecular deposition method. The research results of the cellular biomimic membranes,inorganic biomimic membranes,and hydrophobic biomimic membranes are given in this review; the practical application is also discussed. In the end,the latest trends in the study of biomimic membranes are predicted.