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After the dyeing of nylon with acid dyes, it is possible to increase the washfastness of the dyeing by the addition of a fixative.

 

  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.

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