Happy New Year everyone . I’m after some more advice with this colour formula. I was advised a couple of shades in KP but after speaking with my client some more she likes to change her hair regularly so I’m now thinking to use something in Colour Touch. I put a CT 6/47 on the strand test but it’s not touched the roots. Queried this with my client and she thinks it was previously colour melted with a permanent. Also explains why when I did a strand test with KP 6/43 it was really dull on the root area. Any help appreciated please