Research Article
Extraction and Optimization of Natural Dye from Hambo Hambo (Cassia singueana) Plant Used for Coloration of Tanned Leather Materials
Table 4
Color fastness properties of dyed leather samples.
| | Method of mordanting | Mordant concentration | Rubbing fastness | Light fastness | Fastness
to perspiration | | Dry | Wet | 24 hr | Acidic | Basic |
| | Simultaneous mordanted with copper sulphate | 3% (owm) | 5 | 5 | 8 | 4/5 | 5 | | Dyed without mordant | Nil | 5 | 4/5 | 6 | 4 | 5 | | Premordanted with aloe vera | 40 g/l | 5 | 4/5 | 6 | 4/5 | 5 | | Premordanted with mango bark | 40 g/l | 4/5 | 3/4 | 5-6 | 4 | 3 |
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