How to Dye Nylon/Cellulosic Blends Using Acid & Direct Dyes in a One-Bath/One-Step Process
This procedure is sometimes used when a union dyeing(fibers are same shade) is desired. Orcolan Neutral™ dyes are recommended for the nylon as they are applied at a pH near neutral. If the substrate being processed is rayon, do not exceed a pH of 9 as it will cause saponification of the fiber.
- Prepare goods as necessary.
- In a bath at 105°F(41°C), add:
- 1.0 % owg Orconol CHSA Conc™
- X % owg Orco Nylon Resist P™ as necessary
- Set pH to 9 using ammonium hydroxide and run for 10 minutes.
- Add Orco™ Acid dye properly prepared
- Circulate for 5 minutes.
- Add Orco™ Direct dye properly prepared
- Circulate for 5 minutes.
- Add 20 % owg Common or Glauber’s salt and raise temperature to 160°F(71°C) over 20 minutes.
- Adjust pH to 6.0-6.5 and increase temperature to 200°F(93°C) over 30 minutes and continue for one hour.
- Drop bath and rinse well.
- Finish goods as necessary.