|
Parts/1000 parts
|
Dye |
Caustic Soda Flakes |
Common salt |
|
Up to 30 |
10 |
300 |
|
45 |
15 |
300 |
|
60 |
20 |
300 |
|
75 |
25 |
300 |
|
90 |
30 |
300 |
Pad - Batch -
Wash - Dry
|
Padding Liquor |
Dye + 2-5 gm/l wetting agent |
|
|
+10-30 gm/l common salt |
|
|
+15 gm/l caustic soda 100% |
Fabric should
Padded in the above padding liquor and covered with a plastic sheet.
Wash it after Keeping it for maximum 24 hours.
Washing Off
Procedure,
to optimize wet-fastness properties,
brightness and purity of shades with consistent dyeing results; give a
through 'Soaping' to clear off unreached hydrolyzed dye.
The dyed fabric is rinsed in cold water to remove the alkali, salt and
unfixed dye and then rinsed in warm water (up to 60oC) then
run in a bath containing.
Anionic detergent - 1/2 gms/liter for 15 minutes at the boil. Rinse in
warm water (up to 60oC) and finally in cold water. The best
for the piece goods is achieved by using open soap or perforated
washing machine. When it is not feasible regular Jig / which is used.
Open-vat and package Dyeing are used for yarn hank and package for
respectively.
Printing Procedure
Low reactivity offered good containing alkali. Also Low Substantively
the hydrolyzed dyes have the least tendency to stain adjacent white
materials and hence are most used by printing applications. The
printing Procedure are :-
Print - Dry - Steam - Wash - Dry ('H' dye with alkali) Printing
recipe
|
|
|
Reduction |
|
'H' dye |
5-70 |
- |
|
Urea |
50-100 |
100 |
|
Water |
505-420 |
475 |
|
Sod. Alginate 4% to 6% |
400 |
400 |
|
Resist Salt |
10 |
10 |
|
Soda bi carb. |
15-30 |
15 |
|
Total |
1000 |
1000 |
Method
Mix dye with urea and pour hot water (800-85oC)
Stir fine. Add this to sodium alginate thickening paste containing
resist salt stir till mixed prior printing add sodium bicarbonate.
Print the cloth with the print paste and dry. Avoid over-drying and
protect printed goods from acid or reducing fumes. Then steam dried
goods for 5-8 minutes on rapid agar or 15-20 minutes on star agar.
Contd. on Page
4
|
