This stuff works!!! i dyed half my hair black and bleached the other half it went pale yellow and i didnt wanna dye it again so i tryed this i left it on for 45mins with bout 15mins heated, it didnt go white after this but just very, very light blonde which looked good since it took out that yellow colour, after a few days i reapplyed it for 20mins no heat and after i rinsed it off it was WHITE. will deff buy again soon :) -Johnny-