How to Dye Polyester/Spandex Blends with Orcolan Neutral™ Acid Dyes using a Two-Bath Process
- Prepare goods as necessary.
- In any procedure involving Spandex®, the temperature should not exceed 200°F(93°C) as it may degrade the integrity of the fiber.
- Enter goods into a bath at 120°F(49°C) containing:
- 2 % owg Acetic Acid 56%
- 2 % owg Anionic Wetting Agent
- 6 % owg Orco Dye Carrier LLRS-2™
- Run for 10 minutes and add:
- X % owg Orcocilacron™ disperse dyes properly prepared.
- Raise temperature to 195-200°F(90-93°C) being careful not to exceed 200°F, and run for 1 ½ hours.
- Cool back to 120°F(49°C) and overflow rinse until clear.
- Perform a reduction scour to remove unfixed disperse dye from the Spandex®
- Enter the goods into a bath at 100°F(38°C) and add:
- 0.30 oz/gal(2.25g/L ) Orcoterge ALK-N Conc™
- 0.40 oz/gal(3.00g/L) sodium carbonate
- 0.50 oz/gal(3.75g/L) Sodium Hydrosulfite
- Raise temperature to 180°F(82°C) and run for 20 minutes.
- Overflow rinse until clear.
- Add 0.16 oz/gal(1.2 g/L) of hydrogen peroxide 35% to a fresh bath at 120°F(49°C) and run for 15 minutes.
- Overflow rinse until clear and drop bath.
- Now dye the Spandex®portion of the fabric using Orcolan Neutral™ premetallized dyes.
In a bath at 100°F(38°C) add:
- 0.5 % owg Orco Salt O Solution™
- 1.0 % owg Orconol CHSA Conc™
- 1.0 % owg Ammonium Sulfate
- Adjust pH to 9.0 with ammonium hydroxide and run for 10 minutes.
- Add the properly prepared Orcolan Neutral™
- Circulate for 10 minutes.
- Slowly raise temperature to 190-195°F(88-90°C) and run for 1 ½-2 hours adding acetic acid to promote dye exhaustion if necessary.
- Overflow rinse well and drop bath.