To dye polyester, scrub the fabrics, immerse them in a hot dye solution and rinse them. You need the dye, a washing machine, clear water, heating pots, Synthrapol detergent, a wooden stirrer and fabrics.
- Scrub the fabrics
For every pound of fabric, add 1/2 teaspoon of soda ash and 1/2 teaspoon of Synthrapol to the washing machine. Load the machine with the polyester fabrics, and let it complete a hot-water cycle. Don't dry the fabrics.
- Mix the dye
Heat some water in a big pot, add the dye and stir. If dying bright or dark colors, add dye carrier to the mix.
- Dye the fabrics
Immerse the fabrics in the dye solution. While stirring, continue to heat the pot at a medium temperature, and let the dye simmer for half an hour. Dark colors need to simmer longer.
- Rinse the fabrics
Heat a pot of clear water to 180 F. Remove the fabrics from the dye, and immerse them in the hot water. Stir for a few minutes, and transfer the fabrics into another pot of clear water heated to 180 F. Continue rinsing until the rinse water is clear and odorless.
- Launder the fabrics
Launder the fabrics, and dry them in a dryer.