Pouring about a cup of salt in the washing machine along with the dye helps to set the color. Allow the agitator to mix the color in the hot water thoroughly and the salt to dissolve before adding your fabric. Rinse the fabric twice (or until water is clear) in cold water. Cold water also helps to set the color and rinse out any color that didn’t “take”. Rinsing will also prevent bleeding when in the future the fabric needs to be washed. Good luck.