Research Article
Forensic Discrimination Potential of Blue, Black, Green, and Red Colored Fountain Pen Inks Commercially Used in Pakistan, by UV/Visible Spectroscopy, Thin Layer Chromatography, and Fourier Transform Infrared Spectroscopy
Figure 9
Normalized FTIR absorption spectra for red fountain pen inks. 1 and 2 represent samples no. RD1 and RD2, respectively.