I mix henna, and my own clay mixes for washing/ conditioning my hair.
It's usually consists of; 2 or 3 scoops calcium bentonite, 2 or 3 scoops of rhassoul, 1tsp silk amino acids, either steeped hibiscus and marshmallow root or a half tsp of ACV, and water to fill a 16oz applicator bottle.
Sometimes I'll add milk (only to mix without the hibiscus tea) . I also mix up the occasional flaxseed gel for my friend.