Mehndi, the outer epidermal layers of the wet work, permanently. Why the reason for your stain is impermanent, magical, mystical, because it is the mystery. Or not. Exfoliates your skin off, right? The deeper your mehndi stains, and the longer the duration of your design. Therefore, it is very important to be aware of henna design latency. Strong soap and henna stains the hands of a washing shortens the life of your skin exfoliates.
Darker skinned to avoid misconception that prevents you from being able to have a dark mehndi. In the case of no doubt. Only people with very dark skin, even though it uses the best henna pastes, skin color, very small, there is a hue to dye. Dark-skinned Indian like myself, I can tell you from my mehndi on my hands as a dark brown on both sides, and a nice, dark Sienna I can not my legs.
Perhaps, be sure to design a small, but very fair-skinned people also can not be assured that the mehndi stain is good. And remember, an art that is used throughout the world, people of all skin color is different.