hi,
so this is probably a very simple question to hairdressers, but since christmas I have been topping up my grey roots [there is not many but I am self-concious] with Wella colour touch semi permanent with the 6vol developer, however there is also wella colour touch plus which is demi -permanent and lasts longer and uses a lower developer [i think a 4 instead of a 6].
Basically, long term I will go blonde when the grey becomes too much, but I dont think that will be for several years yet.
will it make a difference to the condition of my hair if I use the demi instead of semi permanent, will one be easier to bleach over? or is the difference minimal?