I spoke too soon when I said henna covered my grays well, once dry i could see it didnt. I decided to do a complete head henna for the first time in a year. Usually I just touch up gray roots in front. For my dark hair you cant see where henna stops and natural color starts because my hair is reddish brown. Anyway left it in two hours and still not a lot on color deposited in grays. Took the cream henna and slept in it last night. Better but still light. As my grays get longer the repeated henna darkens ends to color I like but nott roots. Is this because Im lopo. Tips for color absorb improvement.?