Hi
I recently bought a Redken EQ shade of Ebay (walnut). Turned out pretty good,even had a couple of people comment on it which i dont usually get

My question is - how often can i use it? Is every 6 to 8 weeks ok? Most colours dont last on me long unfortunately.
Also anyone who uses this - how do you find they fade out? Most colours as they fade turn my hair so brassy! seems to bring out the red in my hair even more.
Thanks