DYEING PROCEDURE

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Technique No. v : Isothermal Method (Dyeing Heavy Shades Garment), procedure is recommended for machines with microprocessor controlled addition systems for medium to heavy depths ( > 0.5% depth) on cotton.



Dyeing Procedure for Jigger Machines

Due to high temperature dyeing the problems of off-shade selvedges of too pale selvedges are often encountered in dyeing with these machines. The precautions to be taken with such problems.

1. Use closed jiggers so that a uniform temperature is possible across the width of fabric.
2. Batch the fabric evenly.
3. Maintain the dye bath at least Minimum of 85⁰ to 90⁰C during salt stage.
4. Adjust the dye bath temperature 85⁰ to 90⁰C to ensure that fabric is maintained at minimum 80⁰C during alkali addition stage.

Procedure

Set the dye bath at 90⁰C with resist salt 2 gms/l. Now add 1/2 amt. of dye and run one end. Then add remaining 1/2 amt. & run another one end. Add 1/2 amt. of salt & run one end. Add remaining 1/2 amt. Of salt and run another end. Maintain 80⁰C temperature continue to run for 2 ends. Now add 1/2 amt. of soda ash & run for one end. Then add remaining 1/2 amt. Soda ash & run for another one end. Then add remaining 1/2 amt. soda ash & run for another one end. Then run for 4 ends or more if required & wash. (1 end =10 minutes)

Dyeing method for cotton / polyester blend

The one bath two stage dyeing method for polyester / cotton blend is applicable on jet, beam or package dyeing machines.

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