any hairdressers out there please help!! i need to do my roots - dark brown hair to a blonde - 12.1 koleston with a 12% 40% liquid peroxide = what are the mixing ratios peroxide to cream and how long...
My natural hair colour is dark brown and for years have used koleston perfect 12/1 with a 12% 40 vol liquid peroxide. I only colour the root regrowth about every 6 weeks could you let me know the...
