Flow Chart of Cotton Dyeing Process

Cotton is a soft, fluffy staple fiber. It is a natural and most popular fiber. Cotton is dyed with a range of dye types, including vat dyes, and modern synthetic reactive and direct dyes. The flow chart of cotton dyeing process of cotton is given below.

Flow Chart of Cotton Dyeing Process
Dyed cotton

Flow Chart of Cotton Dyeing Process

The required amount of water was taken into the machine

The fabric was loaded and run for 5-10 minutes at normal temperature

BOS, FE,CF,H-53 (Scouring Chemicals) were added at a time for 5 minutes

Caustic was added at normal temperature for 5 minutes

The temperature increased to 60 ºC

Hydrogen per Oxide(H2O2)was added for 5 minutes

The temperature increased at 95 ºC and continue for 1 hrs

Sample check

Cold wash at 40 ºC for 5-10 minutes

Hot wash at 95 ºC for 5-10 minutes

The required amount of water was loaded

Acetic acid was added

The temperature increased at 80 ºC for 15-20 minutes

Cold wash at 40 ºC and drain

Water filled and Acetic acid was added

PH check at 4.5

Leveling agent at 60 ºC for 5-10 minutes

Salt at 60 ºC for 5-10 minutes

Run time 10 minutes

Dyes at 60 ºC for 30 minutes

Run time 10 minutes

Check the sample

Soda ash at 60 ºC for 40 minutes

Run time 10 minute

check the sample

Colour steam

B D (Bathe Drain)

Wash

Hot wash

Acetic Acid

Run for 20 min

Then unload the garments

Dyes are used for coloring yarns and fabrics. Dyes are molecules is absorb and reflect light at specific wavelengths to give human eyes a sense of color. Basically, there are two major types of dyes. one is natural and another is synthetic dyes. The natural dyes are extracted from natural substances such as plants, animals, or minerals. Synthetic dyes are made in a laboratory. Chemicals are synthesized for making synthetic dyes. Some of the synthetic dyes contain metals too. In the garments industry, the artificial dye used most.

Author of this Article:
Rana Sohel
 Executive Engineer
 Sunman Textile Mills Ltd. Chittagong
 Cell: +8801912-420118
 Email: rsohel07tex@gmail.com

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