Zirconium Oxychloride as a Novel Mordant for Natural Dyeing of Wool Yarns

Table 1

Central composite design for mordanting of wool with HCl.

Run number	A: zirconium oxychloride; (wt%)	B: temperature; (°C)	C: citric acid; (o.w.w.%)	D: HCl (37%); (o.w.w.%)	Tenacity; (g/tex)
1	10.60	95.00	12.80	5.65	8.62
2	5.60	77.00	12.80	5.65	8.57
3	8.10	70.86	9.55	8.00	8.86
4	8.10	86.00	9.55	8.00	9.21
5	8.10	86.00	9.55	4.05	8.76
6	10.60	77.00	6.30	10.35	8.86
7	8.10	86.00	9.55	8.00	9.17
8	8.10	86.00	9.55	8.00	8.95
9	8.10	101.14	9.55	8.00	7.65
10	8.10	86.00	9.55	8.00	9.03
11	8.10	86.00	9.55	8.00	9.56
12	12.30	86.00	9.55	8.00	8.57
13	5.60	95.00	6.30	10.35	9.12
14	5.60	95.00	12.80	10.35	9.13
15	3.90	86.00	9.55	8.00	8.95
16	8.10	86.00	15.02	8.00	8.34
17	8.10	86.00	4.08	8.00	8.9
18	10.60	77.00	12.80	10.35	9.5
19	5.60	77.00	6.30	5.65	9.52
20	10.60	95.00	6.30	5.65	9.19
21	8.10	86.00	9.55	11.95	8.38