Q&A for How to Dye Brown Hair Black

Going darker doesn't really damage the hair. You can use a really gentle catalyst when you're dyeing hair a darker color, which is why it isn't as damaging as going lighter.

Yes. Any hair that grows in after you dye your hair will be the original color.

You can just dye it without bleaching.

It is a bit harder, because you have to bleach it first, and then dye it back to a brown close to your original color.

Once the dye has been thoroughly washed out of your hair, it shouldn't stain any articles of clothing you may be wearing after the fact.

Without bleaching or hair damage, any hair dye will fade to your natural color.

You don't have to do anything differently if your hair short, you will just require less dye.

It is always good to have another person to make sure you got your roots, and make sure there aren't any missed spots. Doing it with a mirror is hard and you can miss areas still.

No it won't, as it should be applied to darker hair colours as the deposition process will be way easier for the dye. Just apply the black dye, absolutely no need to bleach beforehand.

There are specialist beard dyes available in most stores that sell hair dye and this would be better as they are made to be safe to use on your face.

Yes, but the highlighted areas may come out lighter. But if you dye it twice, it should be a fairly consistent colour. It will be dependent on how light the highlights are.

If it is already a dark black, then dying it again would likely not make it significantly darker, alternatively you could just dye the strands that were not dyed.

It will just fade eventually to your regular hair color. Or you could dye it brown.