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

Table 2

Different absorption bands for blue, black, green and red fountain pen inks using UV/Visible spectroscopy.

Blue						Black						Green				Red
BL1	BL2	BL3	BL4	BL5	BL6	BK1	BK2	BK3	BK4	BK5	BK6	GN1	GN2	GN3	GN4	RD1	RD2
(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)	(nm)
280	280	-	280	-	280	-	235	-	-	-	235	255	-	255	235	-	250
315	315	315	315	315	315	335	315	320	310	305	302	-	-	-	265	-	270
385	-	385	385	-	385	415	-	415	-	-	-	310	305	310	-	330	335
595	605	595	595	601	585	-	-	-	500	510	507	410	385	410	430	505	505
-	-	-	-	-	-	575	590	570	610	595	605	630	640	630	640	-	-