Sulphur dyeing is used for dyeing of cotton and in market it is available inpowder and liquid form also. In exhaust dyeing maximum powder form is used indyeing of cotton material.
In sulphur black dye main advantages it can cover immaturecotton available in fabric portion and get lot of fashion shade. Even in FabricDyeing general fashion is there if shade wise any major problem is thereconvert it sulphur black shade.
Here in this article we are going to show the sulphur dyeused in different machinery.
Drumming machine: For garment micro garment quality was used (50% polyesterand 50% cotton blend quality) one trail was observed in 50 kg lot.
Quality:-micro garment quality (50% polyester and 50% cottonblend quality)
Quantity:-50 kg
M; L:-1/15
M/c used:-Drumming m/c
Order:-For local quality.
Process used:
I) Desizing agent (Enzyme) = 200 gram
(Run at 55 degree Celsius, 20 minute holding time.)--------Washing---------
II) Lubricant = 500 gram
Sulphur Black =4.500 kg
Sodium Sulphide=4.500 kg
Common Salt =10 kg
Soda ash =700 gram
(65-70 degree Celsius, holding time 30 minute)----Washing----
III) Hydrogen peroxide=700 gram
Acetic Acid=400 gram
(10 minute holding, cold)
IV) Bio-polishing:-
Bio-SL (Enzyme) =400 gram
Lubricant=500 gram
Acetic Acid=800 gram
(Holding time 30 minute, at 50 degree Celsius)----Washing---washing----unloadingfor finishing section.
Note: Acetic Acid quantity was taken more because water PH is alkaline comingrange 8.0-8.5.
From above it was observed three processes was involved.Desize----sulphur dyeing---oxidation---bio-polishingwashing---washing .Theabove lot within 2 hours was taken out. Result was satisfactory for localquality within short time getting result.
Continuous Dyeing machine:
For Cotton Twill quality (Drill quality)
Order:-Export Quality.
I) Sulphur Black dye=95 gpl
Crypto-anionic wetting agent=2 gpl
Antimigrating agent=10 gpl
Padding----drying-----Chemical padding
II) Chemical Padding:-
Soda ash=20 gpl
Sodium Sulphide=95 gpl
Paddingsteamingcold wash-oxidation
III) Oxidation:-
Potassium dichromate=5 gpl
Acetic acid=2 gpl
(50-55 Degree Celsius)
IV) Soaping;-
Soap=0.5 gpl
Soda ash=0.5 gpl
(85-90 Degree Celsius)--------hot washhot washcold washdrying.
Final process:-Dye Paddingdrying in hot flue drier---chemical padding---steamingcold washoxidationsoapinghot wash-hot wash cold washdrying and batching for finishing.
(For Fabric neutral PH if required slight acetic acid can be taken in last washing tank)
Jigger Dyeing machine:-
For Drill cotton Quality (For 100 kg lot).
Order:-Local Quality
I) Sulphur Black dye (Powder) =6-8%
Sodium Sulphide=1.5 part of dye quantity.
Common salt=10 kg
Soda ash=2 kg
First Dye-2 Turn (Room Temp)
Sodium sulphide=2Turn (Room Temp) +4Turn (Boil)
+
Common salt=4Turn (Boil) (Salt Addition in two installment)
+
Soda ash=4Turn (Boil) (Soda Addition in two installment)
II) Oxidation:-
Hydrogen Peroxide=2 gpl
Acetic acid=1 gpl
(50-55 degree Celsius, 4Turn running drain)
III) Soaping:-
Soap:-0.5 gpl
Soda ash=0.5 gpl
(80-85 degree Celsius, 4turn running drain)
Hot wash2Turn---Hot wash=2Turn (Fresh water) ---cold washunloaded.
Final process: - Dye drain---cold wash---oxidation---soapinghot washhot washcold washUnload.
Soft Flow Machine sulphur black recipe:-
For Knitting Single Jersey Cotton Fabric (GSM=100):-
For 150 Kg lot
I) Dyeing Recipe:-
Sulphur Dye=14.700 kg
Sodium Sulphide=14.700 kg
Common salt=7.5 kg
Soda ash=1.5 Kg
(Dyeing at boil)
II) Oxidation Recipe:-
Hydrogen Perioxide:-1 liter
Acetic acid:-2.5 Kg
(55-60 Degree Celsius)
III) Soaping
Soap =0.5 gpl
Soda ash=0.5 gpl
(Boil)
IV) Hot washhot washcold washhydro exacterdrying.
Final Process:-Dyeing---cold wash---oxidationsoaping---hot wash---hot washcold washhydro exactor---drying. (Washing can be increased if color bleeding is observed)
First lab trail has to taken then go for bulk trail.
This article has been written in good faith just sharing our experience in production area in different machinery section.
About the Author:
The author is the Product Manager (Reactive Dyes) in Colourtex. Ind. Ltd having 12 years production experience in cotton, polyester and its blend quality in India and overseas reputed company.
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