盖印条件对光敏印章印文特征的影响探究  

The Characteristics of Photosensitive Seals Under Different Stamping Conditions

作　　者：陆延 吕晨[1] 王长亮[1] 周光磊 李彪[3] LU Yan;LÜChen;WANG Changliang;ZHOU Guanglei;LI Biao(The Evidence Identification Center,Shanghai Public Security Bureau,Shanghai Research Institute of Criminal Science and Technology,Shanghai 200083,China;Shanghai Forensic Service Platform,Key Laboratory of Forensic Science,Ministry of Justic,Academy of Forensic Science,Shanghai 200063,China;Criminal Investigation Police University of China,Shenyang 110035,China)

机构地区：[1]上海市公安局物证鉴定中心上海市刑事科学技术研究院,上海200083 [2]司法鉴定科学研究院/上海市司法鉴定专业技术服务平台、司法部司法鉴定重点实验室,上海200063 [3]中国刑事警察学院,辽宁沈阳110035

出　　处：《中国司法鉴定》2023年第1期81-85,共5页Chinese Journal of Forensic Sciences

基　　金：国家自然科学基金(61605132、U1736102);上海市领军人才计划(202079);财政部公益专项(GY2019D-1);中央科研院所公益专项(GY2020G-5);上海市司法鉴定专业技术服务平台资助项目。

摘　　要：目的研究不同盖印条件对光敏印文特征造成的具体影响及其程度,总结印文特征变化规律和特点。方法以盖印压力、印油量、印面与纸张接触时间长短、连续多次盖印这四个盖印条件作为研究因素,采用控制变量法进行实验。结果在盖印压力大、印油浓重、印面与纸张接触时间长的情况下,章面上的固定特征能较好地反映在印文上,可变性特征较为明显;在盖印压力小、印油浅淡、印面与纸张接触时间短的情况下,印文上曝光疵点、缺陷磨损等章面固定特征反映程度相对较差,且变化性特征较少。结论印油量减少是影响连续盖印印文特征的主要因素,缺陷特征及附着物特征保持相对稳定。Objective Studying the specific influence of different stamping conditions on the characteristics of photosensitive seal impressions,to summarize the changing extent and laws.Methods Four stamping conditions,i.e.stamping pressure,ink density,stamping contact time,and continuous stamping,were studied as research factors.The characteristics of stamping impressions made with these four controlled variables were analyzed.Results With higher stamping pressure,thicker oil ink,and longer stamping contact time,the fixed features such as exposure flaws,defects and wear on the stamp surface were better reflected in the stamp impressions,and the variable characteristics were more obvious.On the contrary,the fixed features of the seal surface were less reflected,and fewer variable features were observed.Conclusion The reduction of stamping ink is the main factor affecting the characteristics of continuously stamped impressions,and the characteristics of defects and attachments are relatively stable.

关 键 词：光敏印章 盖印条件 固定特征 可变性特征 

分 类 号：DF794.2[政治法律—诉讼法学]