Medium Crystal Wash Quantum Scrunch Tie Dye Leggings on Royal Apparel Cotton/Spandex Leggings Dye was applied to the shirt without soaking in soda ash and sat for two hours. I then dumped in 3 cups of soda ash water and allowed to soak another two hours before rinsing and washing. Feel free to ask me any questions you may have. Wash with like colors in cold water for first few washes.