通过辨别、对比和检验材料中的变化测定文件日期

对一份文件最早制成时间的检验一直以来都是全世界文检界的难题之一。核实可疑文件的制成时间没有统一的方法,目前主要通过对纸张、墨迹、打字机、复印机、打印机、传真机、印刷品,以及笔迹和签名等因素的检验来确定一份文件的制成时间。文件检验人员需要充分利用他们手中的文件的内容及文件周边信息所反映出来的条件和材料,进而得出结论。

Dating by Materials: Identification, Comparison, and Examination of Changes

How to establish an earliest possible date of a questioned document is one of international puzzles.There is no universal approach to verify the date of a disputed document.At present,the document examiner dates a document mainly through paper,writing inks,typewriters,photocopiers,printers,fax machines,printed matter as well as handwriting and signatures.It is such evidence that the document examiner strives to elicit from the conditions and materials that surround and make up the document at hand.