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Prime School BD (PSBD24) is popular blog site about technology, merchandising, textile & accounting rules in Bangladesh. Also the post that are publishing about Accounting tutorial, Textile, RMG, Merchandising, Knit Merchandising, Woven Merchandising, Apparel Merchandising, Garments, Dyeing, Spinning, Washing, Buying House, else many things with tips & tricks. বদিউজ্জামান ( রুবেল )
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Flow Chart of CVC Fabric Dyeing Process

Flow Chart of CVC Fabric Dyeing Process

In this process, at first the polyester part is dyeing at high temperature e.g. 130-135oC. After completing the polyester part dyeing then cotton part is dyeing by using requires chemicals and control require temperature.


Flow Chart of CVC Fabric Dyeing Process

The sequence of dyeing process with disperse dyes is as follows (Polyester Part + Cotton part Dyeing) by using one bath dyeing method: 

Take water in the machine bath at required level. 
 
Then add Detergent, Sequestering agent, Anti-creasing agent, Dispersing agent. --Circulate the fabric for 5 mins at 50
oC
 
Add acetic acid and circulate for 5 mins at 50
oC
↓ 
Add Glauber’s salt and circulate for 5 mins at 50
oC
↓ 
Check PH of the dye bath. 
 
Add Polyester dye solution by linear dosing and circulate the fabrics for 10 mins at 50
oC
 
Add Cotton dye solution by linear dosing and circulate the fabrics for 10 mins at 50
oC
↓ 
Circulate the fabric and raise the temperature at 130
oC
 
Continuing Circulate the fabric for 30 – 40 mins at a constant temperature at 130
oC
 
Circulate the fabric and decrease the temperature at 70
oC
 
Then Check the shade of Polyester Part with approved shade. 
 
Circulate the fabric and raise the temperature at 82
oC
 
Continuing Circulate the fabric for 30 – 40 mins at a constant temperature at 82
oC
 
Add Soda ash by Curve dosing and continue circulating the fabric for 30 – 40 mins at 82
oC
 
Circulate the fabric and decrease the temperature at 70
oC
↓ 
Then Check the shade of Cotton Part with approved shade. 
↓ 
Rinse and Drain. 
↓ 
Add acetic acid and circulate for 10 mins at 60
oC
 
Drain. 
 
Add Soaping Chemical and circulate for 10 mins at 95
oC
↓ 
Drain. 
 
Circulate the fabric for 10 mins at 70
oC
↓ 
Drain. 
↓ 
Unload.

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