Or else, if you wish to have black locks, you should first use henna on your hair and then the next day treat it with indigo. Indigo powder helps cleanse the scalp thoroughly and prevent itchiness.
It depends on the type of henna - brown is safe, while black 'henna' is definitely not safe. Semi-permanent vegetable dyes such as henna are recommended by the NHS as a safe alternative if you do not ...
Two boys have been treated for chemical burns after having "black henna" tattoos on holiday. Nathaniel, 13, and seven-year-old Kane, from Ryhope, Sunderland, had the tattoos done on the last day ...