基于拉曼光谱鉴定书写/打印文件的朱墨时序  

Identification of the Crossing Sequence of Seal Stamps and Ink of Handwriting/Printed Documents Based on Raman Spectroscopy

作　　者：万敬伟 陈蕾 柴威 孔维刚[4] 崔胜峰 WAN Jing-wei;CHEN Lei;CHAI Wei;KONG Wei-gang;CUI Sheng-feng(Department of Criminal Science and Technology,Zhengzhou Police University,Zhengzhou 450053,China;Department of Pharmacy,Henan Medical College,Zhengzhou 451191,China;College of Criminal Science and Technology,Shenyang 110854,China;Institute of Forensic Science,Zhengzhou Public Security Bureau,Zhengzhou 450016,China)

机构地区：[1]郑州警察学院刑事科学技术系,河南郑州450053 [2]河南医学高等专科学校药学系,河南郑州451191 [3]中国刑事警察学院,辽宁沈阳110854 [4]郑州市公安局物证鉴定中心,河南郑州450016

出　　处：《光谱学与光谱分析》2024年第9期2501-2505,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(21805208);河南省高等学校青年骨干教师培养计划项目(2021GGJS174);河南省高等学校重点科研项目计划(22A620003);中央高校基本科研业务经费项目(2022TJJBKY008)资助。

摘　　要：朱墨时序鉴定是司法鉴定文件检验研究与实践领域中的热点和难点问题。朱墨时序的鉴定可证明文件真伪,推断文件物证是否与案件事实相符,从而为司法机关的侦查破案和案件判定提供法律依据。常见的检验方法有显微镜法、荧光法、文检仪法、计算机软件辅助法等,其鉴定结论易受检验人员主观意识的影响,因不够客观而备受质疑。研究在制备3类签字笔和9种印油组合54个书写样本、激光打印和9种印油组合18个打印样本的基础上,运用共焦显微拉曼光谱仪对其进行检验。以10#百乐签字笔和1#印之秀印油为样本测试得到最佳实验条件,将制备的72个样本放入储存箱内避光保存1年,依次测定样本中先字后印、先印后字、印油和字迹4个位点的拉曼光谱,每个样本测试3次。实验结果基本不受储存环境、纸张本底等因素的干扰,无论是书写样本还是打印样本,先字后印交叉点显示出了印油的部分特征,先印后字交叉点显示出了字迹的部分特征,交叉位点的拉曼光谱图显示大部分为上层相应的字迹或印油的拉曼位移,这与20倍物镜观察的μView图显示结果相互印证。通过比对印文交叉部位的拉曼位移,进而鉴定出样本的朱墨时序。结果表明:相比常规检验方法,此新颖方法简便快捷、无损、灵敏度和准确率高,对文件的朱墨时序鉴定具有指导意义。The identification of the sequence of seal stamps and ink has always been a hot and difficult issue in the research and practice of forensic document examination,which could prove the authenticity of the documents and infer whether the documents are consistent with the facts of the case,thus providing a legal basis for the judicial department to investigate and judge the case.The common identification methods include optical microscopes,fluorescence,document inspection,and computer softwareassisted methods.The identification conclusion is easily influenced by subjective experience and is questioned due to its lack of objectivity.In this study,based on the preparation of 54handwriting samples of 3types of signature pens and 9types of seal stamp combinations,18printed samples of laser printed,and 9types of seal stamp combinations,the samples were tested by Confocal Microscope Raman Spectrometer.The optimal condition was obtained from the handwriting samples(10#Pilotg-1)and seal stamps(1#Print show).The 72prepared samples were placed in a dark storage box for one year.Under this optimal condition,the Raman spectrum of four measuring sites in the sample,followed by ink before seal stamps,seal stamps before ink,seal stamps,and ink,were measured,and each sample was tested three times.The experimental results were unaffected by storage environment or paper background factors.Whether handwriting or printed samples,the intersection of ink before seal stamps displayed some of the characteristics of the seal stamps.At the same time,the intersection of seal stamps before ink displayed some of the characteristics of the ink.The Raman spectra of the intersection showed most of the Raman shifts of the corresponding seal stamps or ink on the upper layers,consistent with the observation ofμView under a 20×objective lens.Raman shift of the sample was compared to identify the crossing sequence of seal stamps and ink of handwriting/printed.The results show that the novel method is convenient,quick,non-destructive,highly sensitive,

关 键 词：拉曼光谱 朱墨时序 书写/打印文件 无损检验 

分 类 号：O657.37[理学—分析化学]