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Yarn Dyeing Process Flowchart

Yarn Dyeing Process

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 Soft Winding: Yarn is transferred to perforated Plastic or Spring Bobbins from paper cone packages.
 Then packages are weighed as per the capacity of yarn dyeing carriers.
 Packages are loaded onto carrier.
 Carrier is then loaded inside yarn dyeing vessel with the help of crane.
Pre-TreatmentMain vessel is filled with water of room temperature and run for 10 minutes
Demineralization50°C20 min
Bleaching & Scouring: H2O2 (Universal Bleaching Agent) and other chemicals are added in the bath. Optimum pH 10-11100°C45 min
Cooled to 60°C
Peroxide Killer: To deactivate the bleaching agent.80°C20 min
Neutralization: Hot Wash with Acid50°C20 min
Salt (Glauber Salt) & Dyeing Chemicals are added into the vessel.60°C20 min
DyeingCheck pH
Color Dosing60°C20 min
Run Time10 min
Color Migration80°C20 min
Cooling to 60C
Level Checked
Soda Dosing50°C30 min
Dyeing Run60°C50-60 min
Dyeing Sample is taken, if sample shade matches with required shade, after treatment process can be done. If not, dyes addition is given to match the shade.
Rinsed with normal water
After TreatmentNeutralization50°C20 min
Soaping: Needs to be done 1-3 times depending on the amount of dyes used.80°-90°C20 min
Rinse with cold water
Wash Sample is checked
Treatment with Fixing chemicals (If needed)50°C20 min
Softener60°C20 min
 Hydro Extraction6 min
 Drying with RF Dryer / Steam Dryer: To remove excess water.
 Yarn Conditioning24 hours
 Hard Winding


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