Hi. For a while I have been thinking of dying my dark brown hair red. I have used semi-permanent hair dye in the past (years ago, all grown out now) but this time I have listened to my inner hippy and bought some Lush Caca Rouge. How long should I keep it on for? The instructions just say at least an hour, trouble is, I don't want to go to all the hassle of doing it and end up with just a slight hint of red.
I would also be grateful for any other tips and hints you might have for henna-ing my mop.