Prepare the fabric. Prewash the fabric according to the directions on the commercial dye product. Most will recommend that you do not dry the fabric, as wet cloth generally takes to dye better than dry fabric.
Mix the dye liquid or tablets in your measuring cup before adding to the bucket with enough water to cover the garments you are dying, closely follow the dye manufacturer directions. Continue mixing until the dye is fully dissolved into the water.
Heat the dye mixture to boiling and then completely turn off the heat. When the mixture is at the ideal dying temperature, add the clothing or fabric and stir it around gently according to the directions on the dye box.
Add 1/2 cup of vinegar to the dye water to intensify the color and continue stirring the fabric for the amount of time specified in your directions.
Follow the dye instructions to set they dye and allow your clothes to dry. Carefully discard the dye without getting dye color on your floor or kitchen counters.