International Journal of Interdisciplinary Research
Table 9 Colour fastness value of the fabric dyed with crude indigo dye and synthetic indigo dye
From: Extraction of Indigo dye from Couroupita guianensisand its application on cotton fabric
Samples | K/S | Rubbing fastness | Washing fastness | Light fastness | ||||
|---|---|---|---|---|---|---|---|---|
CCa | CSb | |||||||
Dry | Wet | Cotton | Wool | |||||
Crude indigo dye | 50% | 0.909 | 4 – 5 | 4 – 5 | 4 | 4 – 5 | 4 – 5 | 6 – 7 |
100% | 1.9941 | 4 – 5 | 4 – 5 | 4 | 4 – 5 | 4 – 5 | 7/7 – 8 | |
150% | 4.0122 | 4 – 5 | 4 | 3 – 4 | 4 – 5 | 4 – 5 | 6 – 7 | |
Synthetic indigo dye | 2% | 4.1921 | 4 – 5/5 | 4 – 5 | 4 – 5 | 4 | 4 – 5 | 7/7 – 8 |
4% | 4.4034 | 4 – 5/5 | 4 – 5 | 3 – 4 | 4 – 5 | 4 | 7 – 8 | |