Sulphur black dyeing in cotton and quality in different dyeing machine

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:

1. I) Desizing agent (Enzyme)  = 200 gram

<spanstyle='font-size:12px;font-family:georgia' style="box-sizing: border-box;">Lubricant    = 500 gram</spanstyle='font-size:12px;font-family:georgia'>

<spanstyle='font-size:12px;font-family:georgia' style="box-sizing: border-box;">OT             = 200 gram</spanstyle='font-size:12px;font-family:georgia'>

(Run at 55 degree Celsius, 20 minute holding time.)--------Washing---------

1. 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)

1. 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.

1. I)   Sulphur Black dye=95 gpl

    Crypto-anionic wetting agent=2 gpl

    Antimigrating agent=10 gpl

    Padding----drying-----Chemical padding

1. 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)

1. 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

1. 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)

1. 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

1. 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)

1. 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)

1. 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.