After the dyeing of nylon with acid dyes, it is possible to increase the washfastness of the dyeing by the addition of a fixative.
- Orcofix MN™
- Orcofix MN-1™ designed for high-shear stability as is necessary when used in machines such as jets.
- 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.
- 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.
- Rinse cold and dry.