Henna, (Lawsonia inermis) is leaves of henna plant that are dried and
powdered.
The greenish powder, is mixed with an acidic liquid (lemon juice + tea + essential oil ) to make henna paste.
This paste is filled in a plastic cone to make designs. This paste is applied like icing a cake. Henna is painless and temporary.
Depending on the skills, artist can make unique designs.