How to After-Fix Dye on Spandex® & Blends

For Cellulosic/Spandex Blends


Orcofix F-NF™

Orcofix F-NF™ is a non-formaldehyde fixing agent for direct dyes on cellulosics and blends offering excellent wet fastness at an economical price. Orcofix F-NF™ offers better lightfastness than conventional dicey (formaldehyde) fixes, improves wet fastness with minimum or no effect on hand, and produces minimum or no shade change attributed to after-treatment.


  • 2.0 % owg             Orcofix F-NF™
  • 0.7 – 1.0 % owg    Acetic Acid 56%
  • Run at 120°F (49°C) for 20 minutes.
  • Drop bath and dry.
  • Do not rinse.


Fix Removal

  • 3.0% owg         Soda Ash or 1.5% owg Caustic Soda
  • 10.0% owg       Glauber’s Salt
  • Run at 200°F(93°C) for 30 minutes.
  • Drop bath and rinse.
  • Before dyeing, re-acidify.


For Nylon/Spandex® Blends

  1. Set a new bath after dyeing, to 100-110°F(38-43°C) and add 1.0-1.5 % owg Orcofix MN™/MN-1™ for light shades and 1.5-3.0 % owg Orcofix MN™/MN-1™ for medium to dark shades.
  2. Adjust pH to 4.0-4.5 with acetic or formic acid and slowly raise the temperature to 160°F(71°C) and hold for 20 minutes.
  3. Rinse cold and dry.

Download This Information