Natural henna comes out brown and can take around 2 hours to set. "Black henna" contains PPD, a chemical that is very dangerous for your skin.
inkbox is 100% natural and safe for the skin, has a blue / black result, and applies / sets in only 15 minutes.
inkbox is neither henna or jagua, it is not a dye or a stain but a formula that seeps into the skin, creating a semi-permanent tattoo.
Read more: http://blog.getinkbox.com/inkboxvshenna