Herbal Henna is a mixture of herbs like amla, shikakai, hibiscus, bringraj etc and does not have any artificial chemicals or oils.
Two steps involved for getting black hair with natural herbs. First applying henna for the hair and and then Indigo powder.Indigo should be applied on red hair only to get dark black in color.
Mix necessary quantity of Indigo powder with hot water. Apply this mixture immediately to your hair.Wear shower cap after applying the paste.
Wash it off after 1hr or 130hr and dry your hair.Please make sure not to apply shampoo on the day of application.Oil your hair after drying.Next day wash with shampoo.