Presented at the 60th Annual Meeting of the American Academy of Forensic Sciences, February 18–23, 2008, in Washington, DC.
Analysis of Pigmented Inkjet Printer Inks and Printed Documents by Laser Desorption/Mass Spectrometry
Article first published online: 10 DEC 2009
© 2009 American Academy of Forensic Sciences
Journal of Forensic Sciences
Volume 55, Issue 1, pages 129–135, January 2010
How to Cite
Donnelly, S., Marrero, J. E., Cornell, T., Fowler, K. and Allison, J. (2010), Analysis of Pigmented Inkjet Printer Inks and Printed Documents by Laser Desorption/Mass Spectrometry. Journal of Forensic Sciences, 55: 129–135. doi: 10.1111/j.1556-4029.2009.01244.x
Points of view in this document are those of the authors and do not necessarily represent the official position of the U.S. Department of Justice.
- Issue published online: 4 JAN 2010
- Article first published online: 10 DEC 2009
- Received 23 Sep. 2008; and in revised form 9 Dec. 2008; accepted 14 Dec. 2008.
- forensic science;
- questioned document examination;
- inkjet printing;
- mass spectrometry;
Abstract: Anyone with a computer, scanner, and color printer has the capability for creating documents such as identification cards, passports, and counterfeit currency. Laser desorption mass spectrometry (LDMS) has been demonstrated as a powerful tool for colorant analysis. Inkjet printers are now moving largely toward the use of pigments as colorants; their insolubility makes analysis by simpler methods such as thin-layer chromatography no longer an option. Recent developments in pigmented inkjet printer inks, such as gloss optimizers that coat pigment particles, may prohibit colorant analysis by LDMS. We demonstrate here that pigments used in inks from two Epson printers can be detected and analyzed by LDMS. Also, LDMS spectra of various colors created using a 4-cartridge (cyan/magenta/yellow/black, CMYK) inkset are evaluated, to begin to develop an approach for unraveling LDMS data from real samples, to determine the number of inks used by a printer, and the chemical composition of the colorants.