Compositional analysis of fiber dyes, printing inks, and writing
inks is a key issue of interest to forensic scientists. Existing
techniques include chromatographic and spectroscopic methods
with literature reports of gas chromatography and gas chromatography-
mass spectrometry to analyze the solvent composition of
writing inks and printing inks [2–8]. Related techniques include
Raman spectroscopy and surface enhanced Raman spectroscopy
[9–11], hyperspectral imaging [12], and fluorescence lifetime [13]