Image of types of dyes and structures

Different Types of Dyes and Structures

 

Dyes can be classified in different manners; based on application class, chemical constitution, end usage and so on.

 

The blog discusses different types of dyes and their structures.

 

Types and structures of different dyes

 

1. Acidic dyes

  • Class: They are anionic compounds soluble in water.
  • Suitable fabric: Wool, Nylon
  • Application method: Beck, exhaust, continuous
  • Color Fixation in percentage: 80 to 93 percent
  • Pollutants associated with the dye: Color, unfixed dye, organic acids

 

2. Basic dyes

  • Class: They are soluble in water. Found in bright colors. Applied in a weak acidic dyebath.
  • Suitable fabric: Wool, Nylon
  • Application method: Beck, exhaust
  • Color Fixation in percentage: 97 to 98 percent
  • Pollutants associated with the dye: Color, unfixed dye, organic acids

 

3. Direct dyes

  • Class: They are anionic compounds soluble in water. They can be applied to cellulosics directly without using any mordant or metals, e.g., copper or chromium
  • Suitable fabric: Cotton, Rayon, Other cellulosics
  • Application method: Beck, exhaust, continuous
  • Color Fixation in percentage: 70 to 95 percent
  • Pollutants associated with the dye: Color, unfixed dye, salt, surfactants, diluents, finish, cationic fixing agents, retarding and levelling agents

 

4. Disperse dyes

  • Class: They are not soluble in water.
  • Suitable fabric: Polyester, acetate, other synthetic fibers
  • Application method: High temperature, exhaust, continuous
  • Color Fixation in percentage: 80 to 92 percent
  • Pollutants associated with the dye: Color, carriers, organic acids, levelling agents, defoamers, phosphates, dispersant, delustrants, lubricants

 

5. Reactive dyes

  • Class: They are anionic compounds soluble in water. The largest class of dyes.
  • Suitable fabric: Cotton, wool, other cellulosics
  • Application method: Beck, exhaust, continuous, cold pad batch
  • Color Fixation in percentage: 80 to 92 percent
  • Pollutants associated with the dye: Color, unfixed dyes, salt, alkali, defoamer, surfactant, finish, diluent

 

6. Sulfur dyes

  • Class: They are organic compounds that contain sodium sulfide or sodium
  • Suitable fabric: Cotton, other cellulosics
  • Application method: Continuous
  • Color Fixation in percentage: 60 to 70 percent
  • Pollutants associated with the dye: Color, alkali, reducing agent, oxidizing agent, unfixed dyes

 

7. Vat dyes

  • Class: They are the oldest dyes. Not soluble in water. Complex chemical structure.
  • Suitable fabric: Cotton, other cellulosics
  • Application method: Continuous, package, exhaust
  • Color Fixation in percentage: 80 to 95 percent
  • Pollutants associated with the dye: Color, alkali, reducing agent, oxidizing agent

 

In the modern era, direct and reactive types are used in cotton dying and the disperse type is used in polyester dying.

 

Which type of dye is suitable depends on the application requirement. Dying experts recomment it after checking the specs.

 

If you are looking for dyes and chemicals manufacturers in india then Sagar Colour Co. is one of the foremost acrylic dyes, cationic dyes and textile chemicals manufacturers in Gujarat as well as other parts of India.

 

Also Read:

 

What are the Requirements of a Substance to Act as a Dye?

 

 

What Are The Multiple Uses Of Textile Auxiliary Chemicals?