浅谈对签名笔迹的检验

1 签名笔迹的特点 签名笔迹与其它笔迹相比较,有其独自的特点:1.签名笔迹的案由都是涉及到经济问题;2.签名笔迹字数少(两、三个字);3.签名笔迹的相同字、同名部首及同名笔画少;4.签名笔迹重复出现的笔迹特征少;5.签名笔迹可比性强的特征少。 2 对签名笔迹检验的方法 对签名笔迹检验的方法,是遵循同一认定的基本原理,对送检文字材料的笔迹特征同嫌疑人     

浅析摹仿签名笔迹鉴定

摹仿签名笔迹检验是笔迹检验的难点,认定签名摹仿人更是难中之难;笔者通过正确确定签名笔迹的真伪,从签名笔迹的概貌特征和细节特征之中运用辩证的观点正确认定摹仿人。     

从摹彷签名笔迹造特征探究检验及鉴定

对摹仿签名笔迹的检验是文检鉴定工作中常见的工作之一,不少文检工作者对此均有各自的见解.本文结合十余年文检工作经验和体会,从摹仿签名笔迹的主、客观特征、识别要点、检验原则等几个方面对摹仿签名笔迹进行识别和检验,提出了从摹仿签名笔迹受主、客观因素影响而形成的主、客观特征出发,运用综合评断原则对其进行检验及鉴定的观点.     

浅谈签名笔迹检验的若干特点及基本方法

本文结合检察机关办案实际，通过分析签名笔迹形成与演变；签名笔迹检验的主要特点以及签名笔迹检验的基本方法，为办案人员在侦查过程中提供明确的侦查方向。     

伪造签名笔迹检验的研究

对伪造签名笔迹的研究,揭示窃取、复制他人亲笔签名伪造文件的手法及其特点,是检验伪造签名笔迹的有效方法。     

伪装签名检验初探

伪装签名是一种签名造假手段,其目的是通过否认签名是自己所写,非法占有他人财物或逃避责任。伪装签名笔迹貌似正常,但受不同伪装手段的影响,笔迹会发生各种变化,因而检验难度较大。检验伪装签名时,鉴定人要解放思想,客观看待笔迹发生的变化,选用正确的检验方法,客观全面地选择笔迹特征,适时补充笔迹样本,条件具备时还应充分利用案情。     

签名笔迹量化检验研究用实验样本的设计与收集

本文在全面说明签名笔迹特点的基础上，阐述了签名笔迹特征层次结构模型的核心内容，重点探讨开展签名笔迹量化检验研究用实验样本的方案设计，收集方法与范围。同时，提出实验样本的设计与搜集应本着“贴近实战，服务办案”的原则，并具体设计了签名笔迹量化检验研究用实验样本的设计方案与具体内容，提出广泛收集具有代表性实验样本的具体要求。另外，提出了研究用实验样本筛选方法和扫描输入计算机具体要求。科学合理的设计与收集签名笔迹量化检验研究用实验样本，才能确保签名笔迹量化检验研究具体分析与统计结果的科学性和实用性。     

横式行草书设计签名笔迹检验探析

随着社会的发展,在各类经济、刑事及民事纠纷案件中涉及对设计签名进行鉴定的案件呈逐年上升趋势。横式行草书设计签名作为一种常见的特殊形式的签名,具有其独特的特点,对此类设计签名笔迹的检验方法还有待充实和完善,为成功地完成对设计签名的检验鉴定任务,总结横式行草书设计签名笔迹的特点,并对其检验依据及检验方法等问题进行分析阐述,以供广大同行共同研究探讨。     

英文书写笔迹特点

随着国际交流和商务往来活动的逐渐增多，涉及英文笔迹检验的案件数也逐年上升。英文笔迹客观反映书写人的书写习惯，对其的检验遵循汉字笔迹的检验方法。笔者结合已受理的英文笔迹检验案例，包括英语试卷、英语书信、英文签名等等笔迹检验，探究英文书写笔迹的特殊性和规律性。     

不同人群签名笔迹特征的研究

笔迹特征差异的形成原因是多方面的。在笔迹多样性的特征中,签名笔迹的特征又有其特殊性。为了在今后的文件检验工作中更好地解决由于签名笔迹带来的问题,本论文通过对人群进行划分,对不同人群的不同书写习惯和笔迹特征进行归纳汇总,为文件检验工作提供一定的判断依据。     

Sequencing of intersecting lines by combined lifting process and scanning electron microscopy

The chronological order in which two intersecting writing or typed strokes were made can be determined for several combinations of writing media by scanning electron microscope (SEM) examination, a lifting and transfer technique using Kromekote paper, or a combination of the transfer technique followed by SEM examination of the remaining material in the intersection. When non-destructive examination cannot provide unambiguous determination of sequence, judicious choice by the document examiner of which technique to use for a given combination of writing media and paper type can be made using known characteristics of the materials involved. The range of line-crossings which can be reliably sequenced is greater using a combined transfer and SEM technique than when the examination is limited to either technique alone.     

Investigation of death through body writing: a case study

Various surfaces or substrates are often encountered in the examination of questioned writing; however, no writing is more interesting than that found on the human body nor more challenging when the writing in question is linked to a death investigation. The body of an 18-year-old male was brought to the State Crime Laboratory, Little Rock, Arkansas, with a gunshot wound to the head and several messages written on his arms and chest. This paper will discuss the examination of evidence used to determine the manner of death through a cooperative effort between the Medical Examiner's Section and the Questioned Document Section of the Crime Laboratory.     

Gelatine lifting, a novel technique for the examination of indented writing

The limitations of the examination of indented writing impressions using electrostatic detection are often paper related. Paper types such as glossy paper, paper of high basis weight, and lithography or gravure-printed papers often give rise to problems resulting in a decrease in sensitivity or a lack of detection altogether. In this paper, a novel technique for the examination of indented writing is presented, which is in a sense complimentary to the technique of electrostatic detection as it is especially suitable for glossy-coated and printed paper types and can in some instances also deal with paper types of higher basis weight. Indented writing grooves will normally contain more particles than the surrounding nonindented areas due to damage of the surface layer resulting in a build-up of filler powder. The method presented uses black gelatine lifter slabs to lift the paper dust image off the surface of the paper. This image can quite easily be photographed using near-to-coaxial lighting. The gelatine lifting method outperforms oblique lighting for the detection of indented writing and is almost as sensitive as electrostatic detection if compared on the types of paper where both perform well. The main advantage of this new technique is, however, that it is especially suitable for those types of paper where electrostatic detection fails and is therefore a welcome addition to the range of methods available to a forensic document examiner for the examination of indented writing.     

论汉字笔迹字群结构习惯及特征

目的字群结构是汉字书写动作系统中高频率书写词汇而形成的特殊单字整体结构。其书写动作的习惯特性不同于单字书写动作系统，具有超出单字书写动作习惯的特性和特殊表现形式。因此对字群结构及其特征的研究有利于完善笔迹鉴定的特征体系，尤其是对签名字迹和具有职业习惯者书写的少量字迹的同一认定有一定价值。     

Sequencing the intersections of printed strokes with writing instrument strokes using DocuCentre expert (PIA 6000-EDF)

Introduction of the digital techniques in document examination has encouraged the Forensic Document Examiners to work with better accuracy in non-destructive ways. In this study, the examination of sequence of intersecting strokes of printers (inkjet printer, laser printer, dot-matrix printer) and typewriters with writing instruments (gel ink pen, ballpoint pen and fountain pen) of different colors was carried out by using Docucenter Expert via PIA-6000 software utilizing extended depth of focus. The continuity of the stroke is the only characteristic which has been observed at the point of intersection.     

正确把握朱墨时序鉴定的几个基本环节

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。     

VSC文检仪在文件鉴定中的应用研究

VSC文件检验仪具有不破坏被检验材料、高效、直观等优点,是目前文件技术检验中普遍使用的检验方法。本文利用该仪器较系统地对文件鉴定中常见的书写材料的光学特性,及其在文件鉴定实践中的应用作了较全面的研究,并对如何获得最佳检验结果和对检验结果如何作出科学的评价等方面进行了探讨,希望能为文件鉴定的实践及制定有关的技术检验规范时提供参考。     

An esoteric technique useful in the identification of unidentified remains from the examination of faded,illegible hospital identification wristbands

A technique routinely used in the examination of questioned documents has been found to be of assistance when employed in the examination of faded and/or partially legible hospital identification wristbands found with unidentified remains (UIDs). A non-destructive test used predominately by forensic document examiners in the analysis of writing inks, handwritten alterations, and obliterations has proven useful throughout the years when confronted with this unusual type of documentary evidence. This discussion paper was prompted by the Tri-State Crematory disaster, Walker County, Georgia, from a request by investigators as to whether or not any information could be obtained from the examination of faded hospital identification wristbands where no information was readily discernable. Subsequent analysis by non-destructive infrared inspection, a standard technique used in the examination of questioned documents, proved useful in assisting with the identification of unidentified skeletal remains.     

Potentiality of 3D laser profilometry to determine the sequence of homogenous crossing lines on questioned documents

The determination of the sequence of line crossings is still a current problem in the field of forensic documents examination. Optical examination, lifting technique, ESDA technique, and electron microscopy are the most widely used methods for the determination of the writing order of crossing texts. However, at present many examinations of intersecting lines result in an inconclusive opinion, particularly if the same type and colour of ink is involved. This paper presents the potentiality of the 3D laser profilometry, which has been to determine the chronological sequence of homogenous "crossing lines". The laser profilometry, illustrated in this paper, has been developed on a conoscopic holography based system. It is a non-contact three-dimensional measuring system that allows producing holograms, even with incoherent light, with fringe periods that can be measured precisely to determine the exact distance to the point measured. This technique is suitable to obtain a 3D micro-topography with high resolution also on surfaces with unevenness reflectivity (usual for the paper surface). The proposed technique is able to obtained 3D profile in non-invading way. Therefore, the original draft are not physically or chemically modified, allowing a multi-analysis in different times. The experiments performed with line crossings database show that the proposed method is able of "positive identification" of writing sequence in the majority of the tests. In absence of a positive identification, the result has been "inconclusive" (no false determination did occur in this work).     

书写习惯未定型成年人笔迹检验

目的研究书写习惯未定型成年人笔迹的检验方法。方法通过实例研究分析成年人笔迹变化的特点和原因,确定笔迹性质和检验方法。结果书写习惯未定型也是成年人笔迹变化的重要原因。书写习惯未定型成年人笔迹是成年人正常笔迹的例外,适用正常笔迹检验方法。结论本研究确立了检材笔迹与样本笔迹非本质差异的判断标准,适用于短时间内变化较大的成年人笔迹的同一认定。