刑事技术
刑事技術
형사기술
FORENSIC SCIENCE AND TECHNOLOGY
2015年
4期
296-299
,共4页
邹积鑫%于健%齐凤亮%秦达%孙林
鄒積鑫%于健%齊鳳亮%秦達%孫林
추적흠%우건%제봉량%진체%손림
假币%印刷版%激光打印版%喷墨打印版%墨点%跟踪暗码
假幣%印刷版%激光打印版%噴墨打印版%墨點%跟蹤暗碼
가폐%인쇄판%격광타인판%분묵타인판%묵점%근종암마
counterfeit currency%printing press%laser jet printing%inkjet printing%ink dots%tracking code
认定假币形成方式是鉴别假币的首要任务。本文基于大量实际案件中收缴的假币票样,探究印刷版、打印版和复印版假币的区分方法,进一步通过比对喷墨、激光打印机打印样本,对相应假币的打印机品牌予以推断。采用 VSC6000文检仪和立体显微镜观察,从图文特征、细节差异、墨点形成特征等,解析印刷、彩色打印、彩色复印这三类假币形成方式的差异;通过图文规则程度、色彩搭配等,区分单色印刷和四色印刷;通过墨点大小、堆积形态、墨点间距等特征,区分三类主要彩色喷墨打印机品牌(佳能、惠普、爱普生)的喷墨打印特征,进而推断喷墨打印版假币的具体品牌;通过对彩色激光打印机的跟踪暗码形状分析,区分不同品牌激光打印机,进而推断彩色激光打印版假币的品牌。通过比较,找到了区分印刷、打印、复印版假币的标志性特征,进而区分了单色印刷和四色印刷特征。应用该方法,分别认定了一起假币案件所缴获的假币票样具有爱普生彩色喷墨打印特征;另一起假币案件缴获的假币则具有富士施乐彩色激光打印特征。
認定假幣形成方式是鑒彆假幣的首要任務。本文基于大量實際案件中收繳的假幣票樣,探究印刷版、打印版和複印版假幣的區分方法,進一步通過比對噴墨、激光打印機打印樣本,對相應假幣的打印機品牌予以推斷。採用 VSC6000文檢儀和立體顯微鏡觀察,從圖文特徵、細節差異、墨點形成特徵等,解析印刷、綵色打印、綵色複印這三類假幣形成方式的差異;通過圖文規則程度、色綵搭配等,區分單色印刷和四色印刷;通過墨點大小、堆積形態、墨點間距等特徵,區分三類主要綵色噴墨打印機品牌(佳能、惠普、愛普生)的噴墨打印特徵,進而推斷噴墨打印版假幣的具體品牌;通過對綵色激光打印機的跟蹤暗碼形狀分析,區分不同品牌激光打印機,進而推斷綵色激光打印版假幣的品牌。通過比較,找到瞭區分印刷、打印、複印版假幣的標誌性特徵,進而區分瞭單色印刷和四色印刷特徵。應用該方法,分彆認定瞭一起假幣案件所繳穫的假幣票樣具有愛普生綵色噴墨打印特徵;另一起假幣案件繳穫的假幣則具有富士施樂綵色激光打印特徵。
인정가폐형성방식시감별가폐적수요임무。본문기우대량실제안건중수격적가폐표양,탐구인쇄판、타인판화복인판가폐적구분방법,진일보통과비대분묵、격광타인궤타인양본,대상응가폐적타인궤품패여이추단。채용 VSC6000문검의화입체현미경관찰,종도문특정、세절차이、묵점형성특정등,해석인쇄、채색타인、채색복인저삼류가폐형성방식적차이;통과도문규칙정도、색채탑배등,구분단색인쇄화사색인쇄;통과묵점대소、퇴적형태、묵점간거등특정,구분삼류주요채색분묵타인궤품패(가능、혜보、애보생)적분묵타인특정,진이추단분묵타인판가폐적구체품패;통과대채색격광타인궤적근종암마형상분석,구분불동품패격광타인궤,진이추단채색격광타인판가폐적품패。통과비교,조도료구분인쇄、타인、복인판가폐적표지성특정,진이구분료단색인쇄화사색인쇄특정。응용해방법,분별인정료일기가폐안건소격획적가폐표양구유애보생채색분묵타인특정;령일기가폐안건격획적가폐칙구유부사시악채색격광타인특정。
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.