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Sulphur Dyes

Sulphur Dyes Manufacturers in India

Veeraco Colourants Private Limited is the leading Sulphur Dyes manufacturers in India. Sulphur dyes are in demand to dye cotton and regenerated cellulose/viscose in the form of Yarn, piece goods, or as an item in combinations.

Insoluble in water they are made soluble (leuco) by placing them in an alkaline reducing agent such as Sodium Sulphide (Na2s). Sulphur dyes can be singled out by their dark colors mostly black, blue, or brown required by different sectors.

Sulphur dyes are complex heterocyclic molecules or combinations that are made by melting or boiling organic compounds having amino or nitro groups with sodium polysulphide and sulphur. Sulphur dyes get their name from the fact that all of their molecules contain a sulphur bond.

Features of Sulphur Dyes:

  1. Sulphur dyes contain a Sulphur bond inside their molecules
  2. Sulphur dyes are water-insoluble dyes with high coloured content. Some colours are only partially water-soluble.
  3. They have no direct attraction to cellulosic fibres. They must be transformed into soluble lucoform using reducing agents to become substantial (Like dilute Na2S solution).
  4. Sulphur dyes have a lightfastness grade of approximately four. An after-treatment with metallic salt may help to increase lightfastness.
  5. These dyes have a wash fastness value of 3-4, which is outstanding. Because of its higher molecular size and insolubility in water, it has a good wash fastness.
  6. Due to the severe alkaline condition, they are not suitable for wool.
  7. They are all amorphous, with only a few showing crystallinities.
  8. Essential for producing a wide range of colours on various cotton and rayon fabrics.
  9. Sulphur dyes are good for dark, long-lasting colours.
  10. Powder and soluble forms are both available
  11. Sulphur dyes are inexpensive and simple to make.
  12. Sulphur dyes have moderate to good heat and chemical resistance. They are not used on objects that have been bleached with hypochlorite because of their weak chlorine fastness.

Characteristics of Sulphur Dyes:

  1. Amorphous Colloidal Materials.
  2. Molecules have a high molecular weight and a variety of compositions.
  3. Heterocyclic compounds with Sulphur linkage have a complex chemical structure.
  4. Acids decompose it, releasing hydrogen sulphide (H2S).
  5. The thiozine ring, which contains a Sulphur atom, is a distinguishing feature.

Sulphur Yellow GC

Sulphur Yellow 2

Sulphur Brilliant Yellow

Sulphur Yellow 9

Sulphur Orange R

Sulphur Orange 1

Sulphur Bordeaux 3B

Sulphur Red 6

Sulphur Red LGF

Sulphur Red 14

Sulphur Dark Brown

Sulphur Brown 4

Sulphur Yellow Brown 5G

Sulphur Brown 10

Sulphur Brilliant Green G

Sulphur Green 3

Sulphur Green F

Sulphur Green 14

Sulphur Dark Blue 3R

Sulphur Blue 5

Sulphur Blue BRN

Sulphur Blue 7

Sulphur Blue BBF

Sulphur Blue 13

Sulphur Green Blue CV

Sulphur Blue 15

Sulphur Black BR - Powder

Sulphur Black 1

Sulphur Black BR - Liquid

Sulphur Black 1

Sulphur Black BR - Crystals

Sulphur Black 1

Disclaimer : The Colour tone furnished herein is considered reliable but without guarantee. As Actual dye samples must be evaluated in a laboratory on medium to be dyed in production for accurate shade and physical property results. Shades shown on print material and monitors/paper are for general reference only as they are inherently inaccurate due to calibration variations and technical limitations of monitors and printers.