Brown to dark natural hair colouring with Henna

You'll need : 

-One cup of Natural Henna powder
-Black tea ( enough to make a dough with )
-Few drops of olive oil
-Few drops of lemon juice ( or vinegar, or grapefruit )
-A bowl

Make some strong tea, and leave to infuse until very dark. Strain out the leaves, or remove the teabag.
Irrigate the Henna in a bowl with the warm black tea you've prepared, until it becomes a soft paste.
( try not using your hand )
Let the Henna paste rest for 2 hours before using.
Then it will be ready to use.
( Put gloves when applying )
Don't forget to cover up your hair with plastic cover after applying.
Leave it for 30 to 45 minutes.
Wash it with a gentle shampoo.

*Your color will be darker every time you repeat the process.
*Henna is very efficient for hair loss and scalp diseases. And it gives a natural shine to the hair.