Low Temperature dyeing of T.Blue dyes.

 

Question:

Is there any method to dye Turquoise Blue shades to dye at 60°C or less?

Answer:
Yes you may dye Reactive Turquoise Blue G and H2GP combinations with VS or Bifunctional dyes at a lower temperature using the preconditioning method of dyeing.

In fact this method of dyeing yields unprectable higher depth and fastness proeperties. You will surly get at least 20% extra yield in dyeing depth.

Please see the table below for procedure and recipe: (Let us consider that the total combination % is more tha 4% o.w.f.)
Fabric (Knit/woven) or yarn preparation: (Unmercerised)

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

Soda Ash = 3.0 g/l

Stabilizer = 0.5 g/l  

Soap (Anionic) = 0.5 g/l

Hydrogen Peroxide = 2.0 g/l

For 45 minutes @ 85°C
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:

First 1/2 Salt Addition

Resist Salt = 1 g/l

Sod.Hexametaphosphate = 1 g/l

Glauber's Salt = 40 grams/liter

For 10 minutes room temperature.
Second 1/2 Salt add. Glauber's Salt = 40 grams/liter For 10 minutes room temperature.
First 1/2 Soda add. Soda Ash = 5 grams/liter For 10 minutes room temperature.
Second 1/2 soda add Soda Ash = 5 grams/liter For 10 minutes room temperature.
First 1/4 caustic add Caustic Soda = 1.5 grams/liter For 10 minutes room temperature.

 

 

Second 1/4 caustic add Caustic Soda = 1.5 grams/liter For 10 minutes room temperature.
1st 1/2 dyestuff Add 1/2 of total dissolved dye Run for 10 minutes at room temperature For dissolving use 1:15 LR @ 70°C
2nd 1/2 dyestuff Add 1/2 of balance dissolved dyestuff. Run for 10 minutes at room tempetature.
Temperaure setting

Raise temperature to 40°C if the combination contain any VS or Bifunctional dye else

raise the temperature to 60°C . Run for 10 minutes

Third 1/4 caustic add Caustic Soda = 1.5 grams/liter Run 10 minutes at the above temp.
Fourth 1/4 caustic add Caustic Soda = 1.5 grams/liter Run 10 minutes at the above temp.
1st dyeing Time Temperature 40°C If your combination contain VS or Bifunctional dyestuffs, then continue dyeing for 30 minutes. This is for allowing VS and Bifuntional dyes to get fixed to the fiber.
2nd dyeing time Temperature 60°C Continue dyeing for 60 to 90 minutes at this temperaue.
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.