yeah were talking bleached up hair that is as clean as possible, any hint of dark yellow or orange tone you will need to get rid of that first, I like 10.19 in essensity to get rid of yellow or 1,5.1 and 1,5.22 equal parts to get rid of anything darker/more orange. the Grey series don't lift or level out or cover, they are very translucent shimmering toners, clean base/slate in crucial. they come out quite mucky looking otherwise. alot of the shades are very dark too, Ive stuck with grey lilac and very diluted dove grey, diluters are the silver (get loads of silver in with this range as you may want to add it with most greys in this range) or you can mix them with BC treatment. hope this helps