How long will Permanent black hair come out?

Okay so I got black permanent hair dye


But I like to dye my hair alot so I might want to dye it again in a month or so, so how long will it come out for?How long will Permanent black hair come out?
i know b/c i have black dye in my hair,......it comes out in like 2 months....i kinda depends on how fast your hair grows and how much you wash it and alot on how much you style it . hope i helped.How long will Permanent black hair come out?
i just dyed my hair black and i tried to dye it back to blonde and it turned ORANGE BRIGHT ORANGE! because it takes several processes to dye your hair lighter again. which means extra time extra damage :-O gah and extra money because you need to use toners and dyes. and i didn't follow those rules i just tried to do it in one clean bleach ha didn't happen.
OK first of all wait for the dye is completely off if not it will mix with you're new color %26amp; get a different color. Also Its not good for you're hair to receive so much Dye %26amp; chemicals. Keeping natural for a few moths.
Black hair color is actually the most horrible color you can put in your hair. Sometimes it fades a little and sometimes it doesn't. The ONLY way to get it out is bleach or stripping your hair.
you need to know that dying your hair black is a permanent sitsuation. until it grows out. no other color will dye over black. i made this mistake before.
Yeah no matter what color you start with once you get black permanent dye in your hair the only way it will come out is when you grow it out
its called permanent for a reason