刑事技术Issue(4)：296-299,4.DOI:10.16467/j.1008-3650.2015.04.011
常见假币形成方式区分方法研究
Preliminary Research on Distinction of Common Counterfeit Currency
摘要
Abstract
Crimes of counterfeiting currency have been getting more complicated in recent years as there are more and more phony money printed by printing presses, laser printers, inkjet printer and the offset. The criminals have been improving the forging techniques by modifying their printing machines, printing ink, and paper in order to replicate the security features of RMB in great detail. Identification of the counterfeiting methods plays a significant role in providing clues for counterfeit crime investigation. In this paper, the counterfeit currency seized from the crime scene was studied together with samples printed by printing press, color printer and color copier. The research was also conducted to detect whether the counterfeits were printed by laser printer or inkjet printer and what brand of printer was used. A VSC6000 document examination workstation and stereo microscope were applied to observe the image-text characteristics, minor details of the counterfeits and to find how the ink dots were formed. With the differences detected, monochrome printing could be distinguished from four color printing in the aspects of the ordination of image-text, color matching, and the like. The major brands of color inkjet printer such as Canon, HP and Epson were identified by the size of dots, pattern of ink piled up, space between dots, and the others. By the shape and the tracking code of the color laser printers, the brand of the printer could be distinguished. Through a large amount of counterfeit currency, the characteristics of monochrome printing and four color printing were found, and therefore counterfeit currencies by printing presses, color printers and color copiers can be distinguished. The method has been applied in cases, where one counterfeit currency was identified to be printed by an Epson color inkjet printer and another counterfeit currency printed by a Fuji Xerox laser jet printer. There were other factors that might influence the analysis results, such as printer modification, the plug-in ink box used to improve the quality of the inkjet printing. The research needs to be further carried out to identify the brands of laser printer as its image-text is more complicated and the printer tracking code of laser printer is waiting to be understood clear on the counterfeited currency. The methods provided in this paper will be beneficial to people working on identification of counterfeit currency.关键词
假币/印刷版/激光打印版/喷墨打印版/墨点/跟踪暗码Key words
counterfeit currency/printing press/laser jet printing/inkjet printing/ink dots/tracking code分类
社会科学引用本文复制引用
邹积鑫,于健,齐凤亮,秦达,孙林..常见假币形成方式区分方法研究[J].刑事技术,2015,(4):296-299,4.基金项目
公安部应用创新计划项目 （）
