This is not something I`d bother with [but that`s just me] as it seems like a lot of work/hassle/expense ..... have a look at this link http://forum.toplace.com/showthread.php?...+hair+to1b and also I`ve narrowed the search down to a few pages [first page is not too interesting] here http://forum.toplace.com/search.php?acti...d=0&page=1 I just couldn`t be bothered with it.... normally dark hair is dyed blond which is harsh enough on the hair and to darken it again involves more harsh chemicals.... I mean it`s your choice, but look before you leap...... Paul.