White Dyeing | Dyeing Flow Chart of Scouring and Bleaching With Optical Brightening Agent (OBA)

Dyeing is carried out for changing the appearance of the grey yarn or fabric. Generally dyeing is done with the help of dyes and chemical. Most of the time raw materials become colorful by the application of dyes. But if we want to get a white fabric we need to pass through the wet processing methods. The methods by which we can get white materials that method are called white dyeing. Generally white dyeing is carried out with the optical brightening agent during scouring and bleaching process.

I have given a flow chart of white dyeing by which we can get a white dyed yarn. The process is as bellow:

Carrier and vessel washed by hydrose and caustic at 1000 C for 20 min

Load the package in the carrier and feed in the vessel

Add wetting agent, anti foaming agent, sequestering agent and run at 600 C for 10 min

Water solution drain

Add wetting agent, sequestering agent, caustic soda, hydrogen peroxide, optical brightening agent and run at 1100 C for single yarn and 1150 C for double yarn for 40 min


Add peroxide killer and run at 900 C for 10 min

Peroxide check in the package


Add acetic acid for neutralization and run for 20 min at 500 C


So, it is the most practical procedure of white dyeing. If you have better idea about this process let me know.

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