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 5

TLC plate developed for (a) blue fountain pen inks, (b) black fountain pen inks, (c) green fountain pen inks, and (d) red fountain pen inks.

(a)

(b)

(c)

(d)