Dyeing time (min) K/S Basic Red 18 Treated fabric Untreated fabric 5 1.6 0.09 10 1.9 0.1 15 2.4 0.2 30 3.3 0.3 45 3.9 0.5 60 4.3 0.8 120 4.6 0.9 180 4.6 1.1 240 4.6 1.1

Table 4: Effect of dyeing time on the colour strength of enzyme-treated as well as untreated polyester fabrics dyed with basic dye (Treatment condition: L.R. 1:40, enzyme concentration 1% (o.w.f.), treatment time 60 min at 40°C, and pH 8). Dyeing conditions: 3% shade, pH 5 at the boiling; the liquor ratio is 1:100.