Dyeing of cotton fabric with sulphur dyes.

Experiment name: Dyeing of cotton fabric with sulphur dyes.

Introduction: 

Sulpher dye is a popular dyes for dyeing of black shade and its advantage is cost effective. Its water insoluble and converted to a water soluble from having affinity for cellulose.

Objective:

1. To learn about dyeing process of cotton fabric with sulpher dye.
2. To dye cotton fabric by sulpher dye.

Machine & Materials:

1. Sample dyeing machine.
2. Oven dryer.
3. Biker.
4. sample fabric cotton.
5. Measuring Cylinder.
6. Pipette.

 Recipe:

Wetting agent           =0.5 g/l (1% s.s)
Sequestering agent   =1 g/l (1% s.s)
Sulpher dye              =2% (2% s.s)
Sodium sulphide      =3 g/l(1% s.s)
Glauber salt              =10 g/l (2% s.s)
Soda ash                   =1 g/l (1% s.s)
Time                         =1 hour
Temperature                 = 90 degree
M:L                           =1:20
Sample Weight          =5 gm

Calculation:

Total liquor =5*20=100 ml
Require dye =Shad % weight of fabric in gm / stock solution
=2%*5 gm/2%
=5 gm

wetting agent=(0.5*5*20*100/1000*1)
                      =5 ml

sequestering agent=10 ml

sodium sulphide=30 ml

glauber salt= 10 gm

soda ash=10 ml

process sequence:

1. Collection of cotton fabric .
2. Reduction at 80 degree for 10 min.
3. Dyeing with sulpher dye.
4. Physical oxidation.
5. Cold rinsing .
6. Hot wash.
7. Cold rinsing.
8. Drying.

Conclusion:

In this experiment we get knowledge about sulpher dyes and how to a cotton fabric dyeing with sulpher dyes .