Table 5.

Trichromatic coordinates of the cotton knit treated with TiO₂-1% Fe-N (Samples 1 and 2), stained with 0.01 g/L MB and coffee, exposed to UV light.

Sample	L*	a*	b*	dL*	da*	db*	dE*	dC*	dH*	Grades
Control cotton knit stained with MB	87.38	−5.06	−2.61	3.2	5.68	6.58	9.26	−8.44	−2.07	1.5
Cotton knit ITO-MB	77.67	−18.76	−15.15	−2.36	−0.61	−0.19	2.44	0.59	−0.24	3.50
HT1-MB	81.7	−8.01	−3.02	1.7	7.09	8.03	10.84	−10.15	−3.42	1.5
HT1 ITO-MB	−8.47	−1.55	2.12	9.41	11.52	15.03	14.46	−13.54	−6.17	1
HT2-MB	82.13	−6.05	−5.68	2.07	11.82	7.59	14.2	−13.96	1.57	1
HT2 ITO-MB	87.76	−7.04	2.31	2.93	7.46	10.02	12.83	−9.02	−8.65	1
Control cotton knit stained with coffee	73.19	5.96	21.56	−5.72	1.71	5.22	7.93	5.49	−0.29	2
Cotton knit ITO-coffee	67.97	7.91	27.01	1.41	−0.68	−1.58	2.22	−1.71	0.20	4.00
HT1-coffee	74.76	5.13	21.55	0.4	−0.01	2.18	2.22	2.11	0.55	4
HT1 ITO-coffee	75.47	7.31	24.87	3.06	−1.12	−0.30	3.27	−0.63	0.98	3
HT2-coffee	76.05	5.28	24.39	1.97	−0.45	3.18	3.77	2.99	1.18	3
HT2 ITO-coffee	74.83	6.01	24.71	2.07	−0.77	2.26	2.97	1.98	1.34	3.5