Vibrational spectroscopic methods are nowadays widely used in the analysis of materials both in xy- and z-directions. Needs to understand durability, especially light fastness, mechanisms in ink jet and toner adhesion mechanisms in electrophotography call for analytical techniques.Sample sets to study applicability of various FTIR and Raman techniques to ink-paper interaction analysis included ink jet prints exposed to different amounts of light energy, and electrophotographic prints fixed in different conditions. FTIR-ATR and Raman measurements in xy- and z-directions were found to be the most promising techniques, since the differences between the samples were revealed most distinctly. The confocal Raman technique proved to be applicable to depth profiling of colorant and toner. Stepscan PAS can be used for depth profiling of electrophotographic prints.
Katri Vikman, Katja Sipi, Pirkko Oittinen, "Applicability of FTIR and Raman Spectroscopic Methods to the Study of Ink Jet and Electrophotographic Prints" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP16), 2000, pp 408 - 413, https://doi.org/10.2352/ISSN.2169-4451.2000.16.1.art00106_1