How to make my hair black

There are natural hair tint/dye products like herbavita/herbatint & henna in the health/supplement/cosmetic stores; they have no ammonia/peroxide etc. Given that dark brown to black is not a huge color difference it should be easy to get the result you want. You might check GNC, Heritage, Trader Joes to name a few. If they con't have these products they can tell who does, or you can google natural hair dyes & get info on stores in your area.

Why not? I died my hair from golden blonde to light brown using only the sun and a bit of Brilliant Brunette shampoo. I have noticed that natural dye looks better than a salon treatment.