I use half and half Majirel 6.32 and 7.31 with 20 vol developer. I like the colour but it's no longer sticking to my greys very well. I think I need to add a base colour (either 6.3 or 7.3) but I'm not sure how to go about this. If I mix a base with another colour I'm not sure if it will still be as effective on greys? I'm thinking 7.3 + 6.32 or 6.3 + 7.31, at 50/50 but not sure...
Also, the ends especially are quite light, so I wondered if dropping to 10 vol developer would help with that, so going for deposit only with no chance of further lifting. Would that still work on the greys though?
Any advice would be really appreciated 