I decided to go back to B red today but its not as red as I used to be, I did use B. Red, red violet so I know that's darker but I thought it would show up more, I used 10 vol and my hair was fairly dark so I'm thinking I should have used 20 or 30...? How long should I leave it before re doing it? I'll most likely use the bright red next time but don't wanna fry my hair in the process... 🙄🙄
anything with peroxide damages your hair so you really want to wait at least one month before re doing your color. Personally i would use a direct dye for color top up as it will keep your hair healthy. As for the peroxide strength, I never recommend using anything about 20vol for these sort of colors.