You’ll still want to check on your hair periodically, but the longer you leave it in, the more color it will remove. Knowing how many colors you want to lift from your hair will also help you determine how long to leave the solution in your hair. If your hair dye color is more intense and you want to remove more color in one treatment, we recommend using 20 volume rather than 30-volume developer. We also recommend using 10 volume developer if this is your first time bleach bathing, as you can always repeat the process as necessary to remove more color. If you just want your color to be a bit lighter or your hair color is already faded, you just need a 10 or 20-volume developer. In order to select the correct developer volume, you’ll need to know how much of the hair dye you want to be removed. Step 2: Understand Your Hair Type and Hair Needs Hydrogen peroxide developer (10 volume for gentle lift, 30 volume for intense lightening).
