45 C for 3 h. For the range of conditions used in the dyeing experiments,
the optimum dyeing effect was achieved at EFCS concentration
of 16 g/L, salt addition of 25 g/L, 50 min dyeing time and
pH of 4 at 95 C. Cellulase treatment can improve the fabric softness
and pigment uptake in all cases compared with the corresponding
untreated samples. Further improvement in color yield was
observed with additional mordanting. Each mordant give different
color shades from brow to light brown and dark browfor aluminum
potassium sulfate and stannous chloride, and to significantly darker
gray for ferrous chloride. All EFCS dyed flax fabric exhibited fair to
good color fastness to crocking, light and washing exception samples
mordanted with ferrous chloride, whose washing fastness was
poor. Cellulase treatment has no obvious effect color fastness before
or after mordanting. It can be concluded that the combination of
enzymatic treatment and EFCS dyeing has a good potential to
produce environmental friendly textile material for safe use in
many fields.