Use of mehndi is a part of several cultures. It is more common in Middle-East and South-Asia. Mehndi or henna is prepared from leaves of a plant called henna. To prepare henna powder the leaves are first dried and then ground. Grinding leaves ensures release of a substance called “lawsone”. Lawsone has the ability to form bonds with skin and stay there for a considerable time. Crushed leaves are then dried to eliminate the moisture so that it is preserved for a longer time. Leftover substance is the “henna powder”.