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Antioxidant ability of wool fabrics dyed with spent coffee extract for 60 min as a function of dyeing temperature (all dying samples were mordanted with 1 wt % tannic acid aqueous solution).
| Dyeing Temperature (°C) | DPPH Scavenging Activity (%) |
|---|---|
| Pristine wool | 59.65 |
| 60 | 93.59 |
| 90 | 94.30 |
| 120 | 95.13 |
