In areas of natural habitat was henna been used for centuries to decorate the body and on special o

Going on a summer vacation to the beach or to exotic countries, where street performers commonly offered temporary tattoo "black" henna? Then do not miss the temporary tattoo "black" henna can cause health problems - serious allergic reactions. Their symptoms appear after 3-12 days and in many cases, require medical attention, even hospitalization. Permanent damage to the skin, allergic contact dermatitis and poly-sensitization have a lifelong character. What is henna? Do you know her?
Henna (Lawsonia inermis L. syn) is 2-6 m tall shrub or small tree that grows in hot, dry climates. It originated in tropical and subtropical regions of North Africa, the Middle East and South Asia. The plant comprises a red-orange swallow tattoo dye, lawsone (2-hydroxy-1 4naftochinón, CI 75480), which consists mainly of paper and its red color is visible in the central veins of young leaves. The dye is capable swallow tattoo of reacting with the protein and its content in the leaves is 1.4 to 4% - it depends a lot on the climatic and edaphic conditions. swallow tattoo Using henna
Henna leaves are harvested, dried and ground. In conjunction with a medium strong acid solution henna dye skin, hair and nails. Lawson can react with the keratin of the skin and changes to orange-brown color. This capability is used to dye skin, hair, nails, fabrics, silk, leather and wool. Primarily used in henna oblastixch occurrence hair dye. There is evidence swallow tattoo that he was in Egypt henna regularly swallow tattoo used for cosmetic purposes - hair dye and dyeing leather art - "body art". This use was later spread to Europe, so henna has become the preferred commodity trade between North Africa, the Middle East and Europe, but even in the new countries never achieved such wide application.
To America and got a henna rare and exotic plants at the beginning of the 20th century. Until recently, henna exported mostly from Egypt. Currently, swallow tattoo it is grown mainly for commercial purposes in western India, Pakistan, swallow tattoo Morocco, Yemen, Iran, Somalia, Sudan and Libya and the largest amount grown in Rajasthan in India. Henna has the ability to stain for one type of color, but in combination with other agents, and synthetic paints, metal salts and other vegetable dyes produces a wide color gamut, is offered under the names "henna red", "black henna," "neutral henna" etc. Added substances in the composition of the final product do not, because the laws of third countries to allow them, but a high incidence of allergies has recently become a reason to regulate her "secret ingredients".
In areas of natural habitat was henna been used for centuries to decorate the body and on special occasions such as festivals and celebrations hire weddings. Decorated body is considered beautiful and happy, had and continue to have cultural and regional character. Usually swallow tattoo it is applied to the hands and feet, where the darker color, swallow tattoo because these parts of the body have a higher content of keratin. I staining of the skin with henna spread to Europe, and in recent years has become very popular. Like in hair dyes and paints to decorate the body, called "black henna tattoo" (temporary tattoos) in addition to other unknown substances. What is a "black" henna?
It is this mixture in the form of a paste obtained by adding other substances to natural henna to achieve a dark color hair coloring and faster and darker effect in leather decoration. What is "black" henna darker the henna has a lower share, or it does not at all. The ingredients may be natural character as indigo, but may also be synthetic and mineral colors. The best known and most widely used synthetic paint paraphenylene diamine (PPD), but is also used carmine (or azo component picric acid), 2,5-toluene diamine, toluene-2, 5 diamínosulfát, silver nitrate, silver and chromid below. Within the meaning of Council Directive no. 76/768 / EEC PPD is allowed only in cosmetics to hair dye concentration max. 6%. Do products to decorate the skin is not allowed.
"Black henna tattoo" is not a tattoo in the truest sense. swallow tattoo In fact it is just the surface of the skin decoration, real tattoo is done by injection - color brings a needle under the skin and is permanent. "Black henna tattoo" has only a temporary effect in recent years in Europe summer phenomenon. Street performers who are constantly moving from place to place, visiting open space such as shops, markets and tourist centers and offer temporary tattoo.
Black henna tattoo is particularly popular on the beaches, especially among young people who are buying it as a souvenir or memory of a summer holiday abroad. Constant change of residence artists, tourists swallow tattoo return home and have an allergic reaction several days after application, create obstacles for local application of sanctions and the artist in question can continue working without being aware of it, ž