For small projects, spraying the fixative directly on the fabric works best. Attach a spray trigger or pour it into a spray bottle. Spray the dyed item liberally with the fixative.
Let it sit for 20 minutes before rinsing with cool water. This is also the best method for tie dyed items or other dyeing techniques where you don’t want the colors bleeding too much before rinsing out the dye.
For larger, solidly dyed items, use the sink or bucket method. Add 8 tablespoons of fixative for every pound of dry fabric to 3 gallons of hot water. Add the dyed item to the bath and stir occasionally for 20 minutes.
Rinse with cool water. After rinsing, the item can be washed with warm water and with a mild detergent.