Dyeing studies and fastness properties of brown naphtoquinone colorant extracted from Juglans regia L on natural protein fiber using different metal salt mordants

Textiles and Clothing Sustainability

Table 1 Colorimetric properties of unmordanted and mordanted dyed wool samples

Mordant	L*	a*	b*	K/S
1% walnut
Unmordanted	62.46	3.04	11.27	1.12
1% SnCl₂	65.13	2.45	12.3	1.38
5% FeSO₄	54.97	2.82	4.88	2.17
10% alum	69.43	3.56	14.93	1.13
5% walnut
Unmordanted	49.20	5.77	9.21	1.51
1% SnCl₂	56.3	5.66	11.08	1.66
5% FeSO₄	51.28	4.75	8.42	2.50
10% alum	58.3	6.17	12.24	1.51
10% walnut
Unmordanted	50.71	7.09	10.59	2.60
1% SnCl₂	43.61	8.44	11.83	4.23
5% FeSO₄	64.25	6.60	16.42	5.80
10% alum	48.36	6.81	10.96	2.80
15% walnut
Unmordanted	41.38	6.13	8.35	3.76
1% SnCl₂	33.05	5.28	9.63	7.68
5% FeSO₄	35.86	7.43	10.7	9.27
10% alum	41.48	5.68	9.61	4.22
20% walnut
Unmordanted	41.12	5.86	7.73	4.27
1% SnCl₂	34.97	7.54	10.48	7.95
5% FeSO₄	27.50	4.98	6.92	11.51
10% alum	38.62	7.14	10.54	6.14