Dyeing method | Colourimetric value | K/S | |||||
L* | a* | b* | C* | ΔE*a | at 400 nm | at 550 nm | |
(a) Undyed | 73.4 | 4.16 | 26.8 | 27.2 | ? | 3.26 | 0.318 |
(b) Redissolution with O2 | 62.5 | 6.30 | 38.1 | 38.7 | 15.8 | 18.1 | 0.756 |
(c) Sequential without O2 | 59.5 | 12.6 | 45.8 | 47.5 | 25.0 | 21.3 | 0.961 |
(d) Sequential with O2 | 59.6 | 16.1 | 50.7 | 53.2 | 30.1 | 19.7 | 0.966 |
(e) Simultaneous Oxidation without O2 | 59.7 | 9.85 | 37.7 | 38.6 | 18.1 | 14.2 | 0.953 |
(f) Simultaneous Oxidation with O2 | 58.4 | 16.9 | 53.9 | 56.5 | 33.4 | 22.9 | 1.06 |
(g) Post-Oxidation with O2 | 54.4 | 18.7 | 37.7 | 42.1 | 26.2 | 12.1 | 1.56 |