Package dyeing of yarn with HE dyestuffs

Posted on January 17, 2010. Filed under: dyeing | Tags: , , , , , |

Cheese dyeing of HE 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 (1st soap)
  • Soap @ 95°C – 15 minutes (2nd soap)
  • Soap @ 95°C – 15 minutes (3rd 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.
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