Package Dyeing of Unmercerised Cotton yarn with High Exhaust Reactive Dyes

· Start Dyeing @50°C; ensure the starting bath pH be 6; adjust with Acetic Acid if necessary.

· Add salt (vacuum or Glauber’s salt) and hold for 15 minutes

· Add ½ the volume of dissolved and filtered dyestuff and hold 10 minutes.

· Add ½ the volume of dissolved and filtered dyestuff and hold 10 minutes.

· Raise the temperature @2°C/minute to 80°C and hold for 20 minutes.

· Add ½ alkali (Soda ash) and hold 25 minutes.

· Add ½ alkali (Soda ash) and hold for 30 minutes.

· Check sample

· Drain

· Cold wash (10 + 10 minutes)

· Neutralize @ 40°C with adequate qty of Acetic acid.

· Cold wash – 10 minutes

· Hot Wash @ 70°C (2°C/minute) – 10 minutes

· Soap @ 95°C – 15 minutes (1^st soap)

· Soap @ 95°C – 15 minutes (2^nd soap)

· Soap @ 95°C – 15 minutes (3^rd soap)

· Hot Wash

· Sample check for shade and wash fastness

· Cold wash (10 + 10) minutes

· Acid wash with 1 gpl of acetic acid

· In the same acid bath – cationic softener treatment – 20 minutes

· Check pH – 6

· Unload.