Wella Blondie lightning this isn't a single pack but it is the same stuff; works like a dream. You just pour some of the bleaching powder into developer 40 proof and then you mix and add to your hair. Make sure you start at your roots and make your way down. Lathering all your hair evenly so that it bleaches evenly . Wait 20 to 40 mins depending on the blonde you are going for and rinse out completely. This product leaves your hair feeling so silky smooth and bleaches it the perfect tone. It's a must try and it won't fry, kill, break or damage your hair like a box bleach.