DYEING PROCEDURE
Procedure Of Dyeing
(Exhaust Dyeing)
|
|
Jigger
Dyeing |
Circulating
M/C |
Winch
Dyeing |
Jigger
Dyeing |
Circulat-
Ing M/C |
Winch
Dyeing |
|
Material:Liquor Ratio
Glauber's Salt |
1:2-1:3 |
1:4-1:6 |
1:8-1:12 |
1:15-1:30 |
1:2-1:3 |
1:4-1:6 |
1:8-1:12 |
1:15-1:30 |
|
Calcined G/L
or
Common Salt
Coustic Soda 72oTw
ML/L |
50-80
4-6 |
50-80
3-4 |
50-80
2-3 |
50-80
1-2 |
50-80
3-5 |
50-80
2-3 |
50-80
1-2 |
50-80
1 |
|
Soda Ash G/L
or
Trisodium Phosphate
G/L |
5
- |
5
30 |
5
15-20 |
5
10-15 |
5
30 |
5
20-25 |
5
10-15 |
5
5-10 |
|
Dyeing Temp. oC
Time Minutes |
-
- |
-
- |
40oC
60-90 |
-
- |
-
- |
-
- |
60oC
60 |
-
- |
In case of VS Turquoise Blue G, Soda Ash is used as an alkali and dyeing is
carried out at 80oC common salt should not be used.
|
Material:Liquor Ratio
|
1:2-1:3 |
1:4-1:6 |
1:8-1:12 |
1:15-1:30 |
|
Glauber's Salt Calcinated G/l
Soda Ash G/L |
80
25 |
80
15-20 |
80
10-15 |
80
5-10 |
|
Temperature oC |
- |
80 |
- |
- |
Padding Method
Any conventional padding equipment could be used for dyeing with this method. It
is preferable to have the size of the troughs as small as possible.
One bath pad batch using Sodium Silicate Sodium silicate and caustic soda
required are as follows:
|
Sodium Silicate |
Caustic Soda
32% m1/1 |
|
oBe |
Weight ratio
Na2O:SiO2oBe |
Gms/l |
Upto 25 gms/l
Dye Solution |
Above 25 gms/l
Dye Solution |
|
37-40
40-42
48-50
58-60 |
1:3.3
1:3.3
1:2.6
1:2.1 |
135
120
100
85 |
13
11
5
- |
18
16
10
4 |
Padding:
The well-prepared fabric is padded at 60-70% expression for cotton and 80-90%
expression for staple viscose fabric at 20-25oC. The lower
temperature is preferred for dye liquor stability.
Fixation:
On completion of Padding the batch is covered with polythene film to avoid
localized evaporation of water and kept as such for 24 hours.
Contd. on Page 2
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