Last updated on June 22nd, 2023 at 06:30 pm
The main object of dyeing process is to give woven or knitted fabric its intended color, crucial to its ultimate use. The process can be carried out at different stages of fibre processing, i.e. in different forms: staple, yarn, fabric (rope or open-width), and piece. It is done in a special type of solution containing dyes and other required chemicals. As a result of dyeing, dye molecules make uncut chemical bond with fibre molecules.
The Process Flowchart of Knit dyeing
Tank filling with water
↓
Fabric loading
↓
Addition of Anti-creasing + Sequestering agent (600 c, inject)
↓
Detergent (inject)
↓
Soda + Caustic (dosing 10′)
↓
H2O2 (700c, inject)
↓
Temperature rise (1100c for 60 minutes)
↓
Temperature is decreased for sample check
↓
Hot wash
↓
P.K.K (980c for 10 minutes)
↓
Rinse & Drain
↓
Acid (550c for 10 minutes, PH check-4.5)
↓
Enzyme (600c for 60 minutes and then sample checked)
↓
Rinse & Drain
↓
Tank again filled with water
↓
Temperature raised to 600c and PH checked 5.5)
↓
Leveling agent (inject, run time 5min)
↓
Salt 1/3 (run time 10 minutes)
↓
Dye (dosing, 600c for 30 minutes)
↓
Salt 2/3 (run time 15 minutes)
↓
Steam down (600c, sample check)
↓
Soda (dosing, 600c for 60 minutes)
↓
Hot wash (900c for 10 minutes)
↓
Rinse (3 times)
↓
Acid (400c for 10 minutes, sample check)
↓
Soaping
↓
Acid
↓
Rinse (1 time)
↓
Softener (450c for 10 minutes, sample check)
↓
Cold wash
↓
Unload fabric
