Assamese Khar

1. Let dry banana peel.
2. Burn the dry banana peel.
3. Put the ashes in a bowl
4. Pour 1 cup of water in the bowl and mix with the ashes and let it rest for about 12 hours.
5. After 12 hours Filter the clear water carefully with a clean cloth.
6. The filtered water is called kola khar.

Whenever khar is required, a small amount of this ash is soaked in water, kept overnight and allowed to settle. The next morning this mixture is filtered through a fine cloth and used.