Welcome to Gaya's Mehendi

.Henna is shrub which grows in the desert regions of Africa, the Middle East, and India.  The leaves of this plant contain a powerful staining molecule called lawsone.  This naturally occurring dye binds with the keratin in skin and hair, creating a reddish brown stain that has been used for centuries for beautification.  The staining process begins with the application of a paste made from the powdered plant, lemon juice, specific essential oils, and sugar.  This paste is applied to skin, allowed to remain for several hours as the plant's dye penetrates the top layers of skin. The dried paste is then removed to reveal an orange stain.  This orange stain will darken over the next 2 to 4 days as the lawsone molecules oxidize from contact with oxygen... just as a sliced apple turns from white to brown if left in the open air.  If high quality henna is used and proper aftercare is followed, a henna stain should last approximately 2 weeks, depending on where on the body the henna is applied.  While a henna stain is technically permanent, your skin is not.  As your skin naturally exfoliates, it takes the stain with it, which is why henna is considered a temporary body art. 

It depends upon the body temperature..the more the warmth of your body, you get more darker stain.