colour b4 and bleach

I have used it after bleaching to remove staining and it has sometimes worked but sometimes it hasn't. I think it's pretty hit and miss. If you don't mind spending the money if it doesn't work I'd say go for it.

Bleaching prior to use doesn't affect the colour removers ability to take out colour, so it will definitely still take out permanent/demi colour and possibly semis, just the same as if you hadn't bleached. I find that colour removers work better on faded semis generally so bleaching first might actually help.

I have a box in the cupboard and was wondering about throwing it on to try to shift the last minty/mould tinge in my hair. Alrwady had it so no pennies wasted.