Application

'VS' based Reactive Dyes

Dye Solution
ICHOZOL^® Dyes are dissolved by pasting it with a little water and pouring boiling hot water over it under stirring. The water used should be neutral. (If alkaline, it should be made neutral by addition of acid prior to use.) Further, if the water is hard, one gram per liter of Sodium Hexa Meta Phosphate may be added.

As far as possible prepare the dye solution just prior to use.

Fabric :

The fabric to be dyed should be thoroughly boiled, desized, bleached and made highly absorbent and neutral in pH to get good results. For deeper shades in cotton, the material is to be either mercerised or causticised with 28°Be' caustic solution. For Viscose, caustic treatment may be made with 6 to 8°Be' caustic solution. The treated material, in all cases should be made neutral prior to use.

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 Dyeing

Exhaust Dyeing

Jig Dyeing
In this method the dyebath is heated to about 5°C above the recommended temperature to get the desired temperature on the material. Dye solution and additives are added as under.

• 1st End —Half amount of dye + half amount of salt
  
• 2nd End —Remaining quantity of Dyestuff and salt
  
• 3rd End —Half amount of Alkali
  
• 4th End —Balance amount of Alkali

Dyeing at 40°C — Dyeing time 90 minutes :

Liquor Ratio		1:2 to 1:3	1:4 to 1:6
Glauber’s Salt	gms/litre	50	50
30% Caustic Solution & Soda Ash or Trisodium Phosphate	ml/litre gms/litre gms/litre	4-6 5 -	3-4 5 30

Dyeing at 40°C — Dyeing time 90 minutes :

Liquor Ratio		1:2 to 1:3	1:4 to 1:6
Glauber’s Salt	gms/litre	50	50
30% Caustic Solution & Soda Ash or Trisodium Phosphate	ml/litre gms/litre gms/litre	3-6 5 30	2-3 5 20-25

Notes :

• For ICHOZOL^® Turquoise Blue G dyeing is carried out at 80°C using 50 gms/liter Glauber's Salt and 15-20 gms/litre Soda Ash alongwith 3-5 gms/litre Caustic Soda (72°Tw) in last 2 ends at temperature.
  
• For ICHOZOL^® Yellow FG. Red C2G and Red 5B using 80 gms/litre Glauber's Salt gives better color yield.
  
• In case of ICHOZOL^® Brilliant Blue R (Spl.) only 1 qtr. of required salt is added over 1st & 2nd ends. The remaining salt is added only after the addition of alkali.

After-treatments :

Following after-treatments are :

Cold rinse with overflow	1 End
at 40°C with 2-3 ml/l 60% Acetic Acid	2 Ends
Hot rinsing (60-70°C)	1 Ends
Soaping at boil with neutral detergent	2 Ends
Hot rinsing (80°C or more) with change of bath water	2-4 Ends
Cold rinse	1-2 Ends

Winch Dyeing :

Dyestuff and Salt are added to the dyebath (25-30°C) Alkali is then added. Bath is heated to the recommended temperature within 20-30 minutes, Dyeing is carried out at 40°C for 90 minutes or at 60°C for 60 minutes.

Dyeing at 60°C — Dyeing time 90 minutes :

Liquor Ratio		1:5 to 1:3
Glauber’s Salt	gms/litre	50
30% Caustic Solution & Soda Ash or Trisodium Phosphate	ml/litre gms/litre gms/litre	1-2 5 10-15

The after-treatment is similar to that given under Jig Dyeing,

Notes :

• For ICHOZOL^® Turquoise Blue G 80°C and 60 minutes dyeing gives better results.
• ICHOZOL^® Red 5B and Turquoise Blue G gives high color yield by using 80 gms/litre Glauber's Salt.
• ICHOZOL^® Yellow FG exhausts poorly and therefore is not recommended for higher liquor ratios