共查询到17条相似文献,搜索用时 703 毫秒
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运用高倍显微镜判断朱墨时序的方法 总被引:4,自引:1,他引:3
作者通过对手写文字与印章印文的朱墨时序的大量实验研究,并结合司法鉴定实践,总结了一套行之有效的运用高倍显微镜判断朱墨时序的检验方法,具有较大的应用价值。 相似文献
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无碳复写字迹与印文的朱墨时序检验 总被引:2,自引:0,他引:2
依据无碳复写纸的制造工艺、结构特点和复写原理,对无碳复写字迹与印文的形成时序特征进行探索,寻求判断两者形成次序的规律性特征以及检验依据和方法,以较为直观的显微检验,分析朱墨交叉点的微观形态,并提出利用微囊壳颜色分析、谷底显色及转印痕迹分析等方法对无碳复写字迹与印文的形成时序进行准确的认定。 相似文献
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目的建立朱墨时序的傅里叶显微红外成像检验方法。方法根据印文及油墨的红外光谱特征峰,使用傅立叶变换红外(FTIR)成像系统直接对纸张上印文及文字油墨进行化学成像,根据成像特征从而判断朱墨时序。结果先打印后盖章的红外成像中油墨字迹的红外成像不完整,有被印章所覆盖的痕迹,而印章的红外成像完整,在字迹中可见印章成像斑点。先盖章后打印的红外成像中油墨字迹的红外成像完整,没有被印章所覆盖,而印章的红外成像不完整,被字迹的油墨所覆盖。结论该方法较传统的鉴定方法更加快速、简单,可以更加直观的反映行文顺序,并且具有不破坏检验样本的特点。 相似文献
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文件朱墨时序的检验方法及其比较分析 总被引:2,自引:0,他引:2
文件朱墨时序的判定是文件检验领域的难题之一。本文以38篇文献为基础,综述了目前常用的解决朱墨时序问题的十一种方法。并对各种方法的适用范围、优点和局限进行比较分析,以期为文检工作者视检材的具体情况采用合适的检验方法,提供一些参考。 相似文献
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目的考察在运用拉曼光谱阵列面扫描检验朱墨时序的方法中书写笔油墨种类对检验结果的影响。方法根据拉曼谱图的不同对搜集的188种书写笔(包括22种黑色圆珠笔,62种蓝色圆珠笔,62种黑色签字笔,42种蓝色签字笔)进行扫描并分类,采用拉曼光谱阵列面扫描技术对书写笔与同一印泥和印油形成的朱墨时序样本进行检验。结果 188种书写笔被分为4大类23小类,4类书写笔与印泥或印油形成的朱墨时序样本都得到了较好的检验结果。结论在本实验条件下,书写笔油墨种类对拉曼光谱阵列面扫描检验朱墨时序的检验结果没有影响。 相似文献
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朱墨时序的检验在文件检验领域中较为常见。本文主要是在许多文献的基础上以及本人从事文检工作中取得的一点经验,对现如今经常使用的解决朱墨时序问题的几方法的优点、适用范围以及其局限性进行深入的比较分析。 相似文献
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光谱成像检验法在朱墨时序鉴定中的应用 总被引:4,自引:0,他引:4
光敏印文色料与签字笔书写色料交叉重叠后,因互溶渗透不易形成层状结构而使判定朱墨时序的难度较大。光谱成像检验法是通过比较交叉点、纯印文色料、纯墨迹色料处的反射曲线位置来判定交叉时序关系。 相似文献
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在文书检验中,朱墨交叉顺序的判定一直是一个常见、重要的内容,对于鉴别文书的真伪具有决定性的重要意义。近年来,在科研和检案实践中发现,正确区分印章印文与书写文字的先后顺序,应掌握以下几个基本环节:有统一的技术规范作指导;检验设备应当满足技术规范要求;对字迹和印文色料与纸张结合方式进行检验;检验方法不能单一,应用多种方法相互对照应证;客观评价阳性反应的出现率和排除假阳性反应的干扰。 相似文献
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Organizing a Proficiency Testing Program on Stamp Impressions Examination in Accordance with ISO/IEC 17043 Requirements 下载免费PDF全文
Chi‐keung Li Ph.D. Janesse Wing‐sze Hui Ph.D. Chi‐Ming Pang Ph.D. 《Journal of forensic sciences》2018,63(5):1556-1560
Stamps and stamp impressions examinations are based on matching defects and design details on the questioned and control samples. These examinations are routinely carried out by document examiners around the world. International proficiency tests for questioned documents examination have been available for decades while similar programs specifically focusing on stamp impressions examination are rare. This study reported a recent proficiency testing program on stamp impressions examination organized by an accredited provider in accordance with ISO/IEC 17043 requirements. Twenty‐four forensic laboratories registered for the program. Apart from giving details on the design and operation of the program, this study also aimed to provide the limitations and difficulties encountered in sample preparations, homogeneity, and stability tests of the testing materials. Various comments and feedbacks received from the participants, particularly in respect of examination approaches, challenges faced by the participants in forming conclusions and their suggestions for further improvement would be evaluated. 相似文献
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The examination of stamp impressions has been an integral part of questioned document examination since its inception. Matching in design details and unique defects has proven to be essential factors for rubber stamps and stamp impression examination. In this study, several duplicate stamps were made from various rubber stamp manufacturers in Hong Kong, from the same original stamp impression(s). The objective was to examine the stamp impressions prepared from these duplicated stamp products and compared with each other and to determine whether they could be distinguished from the source stamp impression(s); by comparison of the size and defects deliberated introduced onto the latter. Further consideration of this study was an attempt to create a perfect duplicate stamp from an original stamp impression. The results of the analysis showed that the quality of source stamp impression(s) and scanner device of the stamp manufacturing process, and the knowledge of the stamp manufacturer were critical to the quality and outcome of the duplicated stamp products. It is concluded that although a perfect duplicate stamp could only be made under several essential control conditions, it was still possible to create a duplicate stamp that replicated the features of the original when a high-quality source stamp impression was available. 相似文献