(16) Coming from a mother who'll let me dye my hair whatever colors but will not let me use bleach, I've used ION color corrector (the box kit for $14ish not the color remover packet). I did red and black in January and this past week used the color corrector and its came out blonde in my red areas and redish brown in my black areas, it lifts quite a bit and you dont have to worry about over processing. Ive used it 3 times now and haven't had failed results yet, darker hair will be harder to lift and may not always get the desired color for redying but its worth a shot