Take note of the other answers!!! Black is incredibly difficult to remove and to want to go blond after it is a pretty tall order. It will take some bleaching and may only lift to a dirty yellow.Because black is obviously the darkest colour, no amount of lighter colours are going to lift it . Bleach is your only answer. Good luck to your hair though, its not going to be in very good condition afterwards. If i were you, i'd just grow it out. Is it long or short?