Doing the 48 patch test as we speak - tomorrow is the day.
I've never dyed my hair at home before - normally get a full head of highlights.
I'm going grey, existing highlights are half way down by head, so have bought loreal age perfect - a light blonde colour.
Is there anything I should know? My main issue is how do I know it is ready- box says 30 mins but i know my hair is normally quite resistant- will anything go wrong if I leave it, say 40 mins - does it get to a certain colour and then just stop?