Dye or dyestuff or pigment chemical properties & classification of dyes

  Dye or dyestuff or pigment description:

Dyes are most important of dyeing & printing . Dyes are those chemicals that has below criteria . 

1. Soluble in water & in dyeing process when they react with fabric dye-bath then they add with fabric & leave water . 

2.Sometimes we make some insoluble dye to soluble state by by using some chemical then the dye should have the ability to fix up in fabric in dyeing process . 

3.Should  have the capability to leave the solution & fix up in fabric .

4. It should be as a part & parcel of the fibre after dyeing .

Chemical properties of dyes :   

In which material has chromophore group & after reaction with textile fibre it changes the chemical & physical properties of that fibre that after light reflection it show in human eyes in different color that are dye . 

You may ask me that why dyes are having affinity to textile fibre . The real cause is that the dye stuff has the below two group .

1. Chromogen &      2. Oxochrome

We divide dyes into two different ways based on its solubility in water . 

1. Water soluble dye

2. Insoluble dye . 

1. Water soluble dye : 

The dyes that are soluble in water are called as water soluble dye . For example : 

a) Reactive dye,

b)Direct dye ,

c) Acid dye ,

d) Basic dye .

2. Water insoluble dye : The dyes that are not soluble in water but after using catalyst they are being soluble in water is called as insoluble dye . For example : 

a) Vat dye 

b)Sulphur dye 

c) Disperse dye 

All water insoluble dyes are soluble state after using catalyst like reducing agents . So viewers stay with my blog to get next blog about direct dye , acid dye , basic dye , vat dye , sulphur dye & disperse dye .