Role of Radiation Treatment as a Cost-Effective Tool for Cotton …
335
Table 12 Fastness properties of fabrics dyed with dispersed Red 153 under microwave treatment
at optimal conditions
Shade (%)
Light fastness
Wash fastness
Rubbing fastness
c.c
c.s
Dry
Wet
Control
4/5
3/4
5
4
4
0.1
4/5
3/4
4
5
4/5
0.5
4/5
3/4
4/5
5
5
1
4/5
3
5
4/5
5
2
4
3/4
4/5
5
4/5
3
4/5
3
5
4/5
4/5
4
4/5
3/4
4/5
5
4/5
Here control is un−irradiated fabric, c.c color change, c.s color stain
0
1
2
3
4
5
6
7
1
2
3
4
5
6
K/S
Microwave Radiation Time (min.)
NRS/RP
RS/RP
RS/NRP
SIM
Fig. 17 Effect of Radiation time on color strength of polyester fabric using Disperse Yellow 79
(DY 79)
of size and more is the even penetration of molecule but an aggregation of small
molecules to great extent may cause desorption upon washing with hot and cold
water, the unfixed dye is removed and low K/S is observed. Good color strength was
obtained by dyeing un-irradiated fabric (NRP) at 65 °C for 55 min. using irradiated
dye bath of pH 11 heating 3 g/100 mL of dispersant under optimum irradiation and
dyeing conditions (Fig. 18). The colorfastness properties of shades were assessed,
which found good to excellent (Table 13). Hence microwave radiation has improved
the substantive behavior of disperse dyeing of polyester fabric using Disperse Yellow
79.
335
Table 12 Fastness properties of fabrics dyed with dispersed Red 153 under microwave treatment
at optimal conditions
Shade (%)
Light fastness
Wash fastness
Rubbing fastness
c.c
c.s
Dry
Wet
Control
4/5
3/4
5
4
4
0.1
4/5
3/4
4
5
4/5
0.5
4/5
3/4
4/5
5
5
1
4/5
3
5
4/5
5
2
4
3/4
4/5
5
4/5
3
4/5
3
5
4/5
4/5
4
4/5
3/4
4/5
5
4/5
Here control is un−irradiated fabric, c.c color change, c.s color stain
0
1
2
3
4
5
6
7
1
2
3
4
5
6
K/S
Microwave Radiation Time (min.)
NRS/RP
RS/RP
RS/NRP
SIM
Fig. 17 Effect of Radiation time on color strength of polyester fabric using Disperse Yellow 79
(DY 79)
of size and more is the even penetration of molecule but an aggregation of small
molecules to great extent may cause desorption upon washing with hot and cold
water, the unfixed dye is removed and low K/S is observed. Good color strength was
obtained by dyeing un-irradiated fabric (NRP) at 65 °C for 55 min. using irradiated
dye bath of pH 11 heating 3 g/100 mL of dispersant under optimum irradiation and
dyeing conditions (Fig. 18). The colorfastness properties of shades were assessed,
which found good to excellent (Table 13). Hence microwave radiation has improved
the substantive behavior of disperse dyeing of polyester fabric using Disperse Yellow
79.