The henna is never black. It is a plant that Africa, South Asia, is native to tropical regions of Australia announced, and its leaves produce a Lawson called dye, a red, orange, adheres well to the protein and therefore to have Skin, hair, nails and used to dye silk. Pure henna is not irritating to the skin, although some people may develop allergies, rosemary should be a really good skin conditioner. Traditional henna tattoos, caramel color, red or brown, are not black.
Henna tattoo on real leaves are dried to a powder and the lemon juice, strong tea or other slightly acidic to form a paste that is mixed with liquids in the ground. 6-12 hours for this to dissolve the cellulose in the leaves and lawsone can continue to "rest" is left. Once the skin surface of the skin layer lawsone molecules migrate from the henna paste. Dough cracks and falls, but the sugar paste or dried lemon mixture over the inside when you seal it to remove the paste darkens dabbing the stain will be orange, but may have a reddish brown. It's still vapor, which can be obscured by the use of heating or alkaline solution, but soap and chlorinated water can ruin the stain. As your skin exfoliates stains disappear and the outer layer of skin cells, should throw stain.
"Black Henna" concept seen with tribal black henna tattoos can come from the alkaline or other source may be. Indigo plants are partially fermented and dried, then mixed with henna and hair black is used, but it can dye your skin.
do. "Black Henna" unlisted dyes generally, the 1.4 phenylenediamine or para-phenylenediamine (PPD) is a being. This chemical is used in hair dyes, but can be 6% or less, do not come in direct contact with the scalp and can be rinsed away. However, "black" henna tattoo is usually 10% -60% and a half hours left on the skin.
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