The data given in Fig. 5 revealed that less colour strength was
produced when cotton fabrics were dyed for shorter time (less than
50 min). Maximum colour strength was obtained at 60 C, when
dyed for 50 min. Initially in the start, dye rate was low, while after
increasing dyeing time, surface modified fabric showed better uptake
of dye. Dyeing for longer time might have shifted more colourant
from irradiated cotton fabric to dye bath. So the rate of
desorption became high and low strength was observed. The study
also indicated that gamma ray treatment of fabric as well as dye
powder was time effective.