In yarn dyeing floor; process for cotton yarn can be vary depending on the individual procedure of a textile engineer or a dyeing master. I have given a process flow chart for 100% cotton dyeing. This sequence is applicable for producing light shade (less than 1%).
Dyeing sequence for 100% cotton for light shade:
Carrier and vessel washed by hydrose and caustic at 1000 C for 20 min
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Load the package in the carrier and feed in the vessel
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Add wetting agent, anti foaming agent, sequestering agent and run at 600 C for 10 min
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Water solution drain
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Add wetting agent, sequestering agent, caustic soda and hydrogen peroxide and run at 1100 C for single yarn and 1150 C for double yarn for 20 min
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Drain
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Add peroxide killer and run at 900 C for 10 min
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Peroxide check in the package
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Drain
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Add acetic acid for neutralization and run for 20 min at 500 C
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Drain
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Ok
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Dyeing period
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Add wetting agent, anti foaming agent, sequestering agent and run at 600 C for 10 min
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Color dosing at 600 C for 20 min
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Color migration at 600 C for 30 min
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Salt dosing at 600 C for 20 min
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Run the machine for 20 min at 600 C with color and salt
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Soda dosing at 600 C for 40 min
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Cotton dyeing at 600 C for 50 min
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Check sample
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Ok
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Drain
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Rinse for 10 min
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Add acetic acid for neutralization and run for 10 min at 500 C
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Drain
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Add washing chemical and run at 900 C for 20 min
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Wash sample check
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Ok
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Drain
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Rinse for 10 min
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Add fixing chemical and half acetic acid, run at 500 C for 20 min
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Add softening agent and rest half acid, run at 600 C for 20 min
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Check finished sample
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Ok
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Drain
Oh, my friends this is my own observation if you have better one let me know the sequence of cotton dyeing for light shade. I think this will give you a better way to get better dyeing performance.
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