The color of the dye solution can be tested when using the sink or bucket method and the stovetop method. You can also check it when dyeing in a top-load washer but not a front-load washer. After mixing the dye with the water, test the color by dipping a scrap of white cotton fabric or a paper towel into the dye solution. If the color is too light, add more dye. If the color is too dark, add more water.
Posted in: Dyeing Specifics