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Rinse your dress in warm water, then switch to cool. Hang your dress up to dry. Run old towels through your washing machine if you used it.
Starting with warm water will help remove excess dye from your garment initially. However, switching to cool water will help the dye to finish setting. When the water runs clear, you have rinsed out most of the excess dye. If you are dyeing your garment in the washing machine, turn it to a warm-cool cycle. Once you have rinsed the dye, it's time to dry your dress! Satin is a delicate fabric, so it's best to let it air dry. If you can't wait for your dress to air dry before you try it on, tumble dry it on low heat. If you washed your dress in the washing machine, most of the dye should have rinsed out in the first cycle. To make sure there's no dye remaining to stain your garments, however, you should run a load of old rags or towels through the wash before you do a regular load of laundry.