Research Article
Application of Purified Lawsone as Natural Dye on Cotton and Silk Fabric
Table 2
Fastness properties of cotton and silk fabrics dyed with lawsone dye.
| | Dyeing technique | Shade% (o.w.f) | Fastness rating | | Wash fastness | Rubbing fastness | Light fastness (40 hours) | | Color change | Staining (cotton) | Dry rubbing | Wet rubbing |
Cotton |
Silk | | Cotton | Silk | Cotton | Silk | Cotton | Silk | Cotton | Silk |
| | Without mordant | 2 | 3 | 3-4 | 3 | 3 | 3-4 | 3-4 | 3-4 | 3-4 | 3-4 | 3-4 | | 6 | 3-4 | 3-4 | 3 | 3-4 | 3 | 3-4 | 3-4 | 3 | 3 | 3 |
| | With tartaric acid | 2 | 4-5 | 4-5 | 4 | 4-5 | 4 | 4-5 | 3-4 | 3-4 | 4 | 4 | | 6 | 4 | 4 | 3-4 | 3-4 | 3-4 | 4 | 3-4 | 3-4 | 3-4 | 3-4 |
| | With alum | 2 | 4-5 | 4-5 | 4-5 | 4 | 4-5 | 4-5 | 3-4 | 3-4 | 4 | 4-5 | | 6 | 4 | 4 | 4-5 | 4 | 4 | 3-4 | 3 | 3 | 3-4 | 3-4 |
| | With copper sulphate | 2 | 4-5 | 4-5 | 4-5 | 4-5 | 4-5 | 4-5 | 3-4 | 3-4 | 4-5 | 4-5 | | 6 | 4-5 | 4-5 | 4-5 | 4-5 | 4-5 | 4-5 | 3 | 4 | 4-5 | 4 |
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