Table 6.

Antioxidant activity of wool fabrics dyed with spent coffee extract at 90 °C as a function of dyeing time (all dying samples were mordanted with 1 wt % tannic acid aqueous solution except 90* sample).

Dyeing Time (min)	DPPH Scavenging Activity (%)
Pristine Wool	59.65
30	94.28
60	94.46
90	94.83
90 *	59.65
120	94.68

* Wool fabrics dyed with spent coffee extract but not mordanted.