Can I dye my blond hair black?
In a word, yes. You can dye your blond hair black. But it's not as simple as just putting a black dye on blond hair. You have to re-pigmentate the hair. In other words, you've got to add red into the blond hair. Otherwise, you're going to have to have an adverse effect. Then you put the dark color on top of that. So you have to have a base for the black dye to sit on, otherwise your hair could turn that green color we always hear about. So yes, you can dye blond hair dark, but there is a process and I would strongly advise nobody to attempt that at home. There is a professional way of doing it, a process, and it has to be watched carefully, so it should only be done by professional hairdressers.
