Right procedure for Reactive Turq Blue Dyeing

 

Question:

What is the right procedure for dyeing cotton fabric/yarn in to a Turquoise Blue Shade? I faced with too much of bleeding even after cationic fixing !

Answer:

Process Recipe conditions Remarks

Pretreatment:

Demineralization:

Lufibrol MSD -0.5 g/l

Kierlon JET B con - 0.5 g/l

For 20 minutes @ 50°C
Hot Wash For 10 minutes @ 50°C
Scouring & Bleaching

Caustic Soda = 0.7% or 1.0 g/p (for softflow)

Soda Ash = 3.0 g/l (only for yarn in HT/HP)

Stabilizer = 0.5 g/l  

Soap (Anionic) = 0.5 g/l

Hydrogen Peroxide = 2.0 g/l

For 45 minutes @ 85°C
  • Do not use soda ash for fabric bleaching. Core neutalization is a problem if we use more alkali. The optimum qty is only 0.7%.
  • Do not use Caustic soda for yarn bleaching - the yarn package will shrink too much and penetration will be affected.
Hot Wash For 10 minutes @ 50°C
Residual Peroxide Removal:

Peroxide Killer(enzyme) = 0.25 g/l

Acetic Acid = 1.5 g/l

For 10 minutes @ 50°C Check pH = 6
Cold Wash
Dye Bath Setup:

Resist Salt = 1 g/l

Sod.Hexametaphosphate = 1 g/l

Soda Ash = 2 g/l

For 10 minutes at 50°C Sharpening treatment
Dyestuff Addition Add predissolved & filtered dyestuff in 2 portions Raise Temperature to 85°C and run 10 minutes
1st Salt addition Add 1/10 of total Glaubers Salt Run 10 minutes @ 85°C
2nd Salt Addition Add 2/10 of total Glaubers Salt Run 10 minutes @ 85°C
3rd Salt Addition Add 7/10 of total Glaubers Salt Run 20 minutes @ 85°C
Note: (if the dyestuff combination contain V.S or Bi-functional dyes   reduce temperature to 60°C)
1st Soda Addition Add 9 gms/liter of Soda Ash Run for 10 minutes
2nd Soda Addition Add 9 gms/liter of Soda Ash Run for 10 minutes
Note: (if the dyestuff combination contain V.S or Bi-functional dyes   continue dyeing at 60°C for 30 minutes) Raise temperature to 85°C and run for 30 to 45 minutes. Do tonal corrections if necessary at this stage.
Drain - overflow cold wash
Neutralization Acetic Acid = 1 g/l at cold for 10 minutes
Hot Wash at 75°C for 2 cycles
1st Soaping Lissopol D paste or Dekol SN or Sandopur RSK liquid = 2 g/l at 95°C for 20 minutes Drain
2nd Soaping Lissopol D paste or Dekol SN or Sandopur RSK liquid = 1 g/l at 95°C for 20 minutes Drain
Hot Wash at 50°C for 10 minutes
Cold Wash overflow
Final pH setup Acetic Acid = 1 g/l at cold for 10 minutes drain and unload.