Using this True Lust hair dye is easy. First, if you want the most vibrant color, bleach your hair to a pale yellow to platinum shade. Make sure the bleaching is even as the pre - dye hair color will impact the final result. Before applying the dye all over, do a strand test because the color in the bottle looks different from how it appears on your hair. When you're ready, apply the dye following the normal hair - dyeing process. Since it's semi - permanent and non - damaging, you don't need a developer. After dyeing, take care of your colored hair by using color - safe shampoos and conditioners. Avoid excessive sun exposure as it can fade the color. If you have dark or previously dyed hair and are bleaching for the first time, remember to lift it to the right color for the best results.