Ecosol- Pre-Reduced Liquid Sulphur Dyes

Ecosol are pre-reduced, stabilized sulphur liquid dyes, containing carefully controlled amounts of reducing agent in order to obtain best stability in storage and colour yield in use. Since these dyes are reduced, they have substantivity for cellulose and are therefore ready for dyeing, although an addition of extra reducing agents maybe required.

After application of the fibre, the dyestuff is converted back into water-insoluble form by oxidation, similar to vat dyes, which result in dyeing with very good fastness to wet treatments.

Salient Features

• No dissolution required.
• Room Temperature dyeing.
• Higher productivity due to short dyeing time.
• Good all round fastness properties.
• Compatibility of dyes for combination shades in all proportions with each other.
• Free from banned amines and comply with Euro Norms
• No Sodium Sulphide, Low salt addition, therefore lesser load on effluent treatment.
• Easier washing off when compared to reactive dyeing.
• Good coverage of dead cotton.

Scope of Application

The good fastness standards of Ecosols make them especially suitable for following cotton rich textiles.

• Warp denim
• Corduroys
• Apron fabrics
• Linings
• Outerwear poplins
• Sewing thread
• Yarn
• Garments

The dyestuffs are equally suitable for dyeing the cotton component of blends with polyster fibres.

General Application methods

Ecosol are applicable by Exhaust dyeing & Continuous / semi- continuous dyeing Application is followed by oxidation, rinsing and soaping

A. Exhaust Methods. 1. Jigger 2. Soft-flow / Jet 3. Winch 4. HTHP cheese 5. Cabinet 6. Tank dyeing 7. Drum Dyeing

B. Continuous / Semi – continuous Methods 1. Pad-Steam 2. Pad-Dry /Pad- Steam 3. Pad – Jig 4. Pad – Batch 5. Pad-Roll

Ecosol (Tub-Dip & Tank Dyeing )

Tub-Dip Dyeing

Calculate the weight of the yarn according to your dyeing requirements Normally 1 bundle weights 5 Kgs)

Standard Dye Solution Prepartion

• Take 5 to 10 ltrs. of water and add
  • Sulfaid Sequestrant IS 25 gms. per bundle.
  • Sulfaid Antioxidant IY 100 gms. per bundle.
  • Sulfaid Levellant IL 10 gms. per bundle.>
• Weigh the required quantity of dyes according to shade, and add  to the solution.
• Dilute the dye bath solution with minimum water.

Dyeing

• Take 75 to 100 ltrs. of water in a small cement or wooden tank and add
  
• Sulfaid Sequestrant IS 2g/l.
• Sulfaid Antioxidant IY 5g/l / Common Salt 10 g/l.
• The required volume of standard dye solution.

And start dyeing continuously (similar to “ACID-BASE” Napthol Dyeing method).

Oxidation

• Wash thoroughly with cold water followed by chemical oxidation.
• Sulfaid Oxidant IO 2g/l
• cetic Acid 2g/l

Notes
1. The increased rotation of yam knots in tanks will give level dyeing (i.e uniform     dye uptake)
2. This method is simplest and quickest but is not advisable for darker shades.

Tank Dyeing

• Take four bundles of yarn. Ensure proper scouring and wetting of yarn.
  
• Take 400 ltrs. Water in an Open Steel, Cement or wooden tank.
• Add Sequestrant IS – 500 gms in the tank and mix thoroughly
• Add Common salt (free from impurities) 2- 10 Kgs
  (5-20Kgs (5-20 gpl in the tank and mix thoroughly.
• Add Ecosol dyes according to the shade requirement.
• Mix the solution thoroughly and immerse the pre-wetted yarn and
  continue dyeing for 30 minutes. At room temperature ensure
  proper rotation of hanks followed by thorough washing with cold water.

Oxidation

• Wash thoroughly with cold water followed by chemical oxidation.
  
• Sulfaid Oxidation 2g/l
• Acetic Acid 2g/l

Standing Bath

• 20 -25 % of the dyeing cost can be ECONOMISED.
• Dyes and chemicals need to be standardized as per localized conditions.
• Accurate weighing of dyes and chemicals, and uniform
  pretreatment of yarn hanks is essential for consistent results.

Ecosol Technical Services
Material Handling Care
Oxidation Methods on Continuous Dyeing
Process Notes on Continuous Dyeing
Procedure Continuous Dye Range
Yarn Dyeing – Package
Shelf Life
Oxidation Responses

The information and recommendations presented here were compiled with the
utmost care, but cannot be extended to cover every possible case.
They are intended to serve as non binding guidlines and must be adapted to
the prevailing conditions.