I am pretty much grey all over, so have a salon tint (20 minutes on roots, last ten minutes taken through the length) every 6-8 weeks. I have a jaw length bob, very fine, dark brown. Wash my hair every 3 days.
My colour always fades a lot by the time I next get it done, multiple shades lighter.
It doesn't seem to matter what shampoo and conditioner I use. At the moment, I'm using Aveda Shampure, but I've used everything from Joico to Pantene in the past. Any suggestions for me and my hair type please?