Forensic Analysis of Inkjet Printings by Pyrolysis GC/MS
Abstract:There is a great number of forensic applications in which it is useful to compare black inks of inkjet printings, for example anonymous letters. Usually, forensic document examiners study dyes of inkjet printings using Raman spectrometry, Thin Layer Chromatography or High Performance Liquid Chromatography. These methods are ineffective when the examiner must study a pigmented ink. Most of black pigmented inkjet inks are based on carbon black.
Using our protocol, PY/GC/MS allows to study the solvents of an inkjet printing. For different inks, we find different solvents in different proportions. Thus, we have found 2-pyrrolidinone, glycerin… For this study, we have used 16 printings coming from 16 different inkjet cartridges (11 inks based on pigment, 5 inks based on dyes) and we have finally identified 13 different groups.
Document Type: Research Article
Publication date: 2005-01-01
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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