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 8

Normalized FTIR absorption spectra for green fountain pen inks. 1, 2, 3, and 4 represent samples no. GN1, GN2, GN3, and GN4, respectively.