Factors considered for selection of dyes

Dye selection depends upon the following factors:

1. Selection of dying method: 

dye selection depends on dyeing method, which may be -

          1. Batch wise/ discontinuous method

2. Semi-continuous method i.e.

                              a) Pad – batch method

                              b) Pad - jig method

                              c) Pad – roll method

3. Continuous method i.e.

                              a) Pad - steam method

.                             b) Pad – dry method

                              c) Pad – thermo fix method

     

         This dyeing method selection depends on:

1.    Speed of dye diffusion on the fibre.

2.    Affinity of dye to fibre

3.    Reactivity to dye stuff.

2. Selection of brand: Brand selection is important. It may be

1.    Hot brand – Less reactive dye (temp 72-93)

2.    Medium brand – Medium reactive dye.

3.    Cold brand – Most reactive dye.

3. Economy of production

4. Availability of dyes

5. Storage of dyes.

6. Bond stability i.e. kind of bonding           

7. Fastness of dye i.e. washes, light, rubbing fastness       

8. Re – producibility