Henna also imparts a temporary resin, which can easily be removed with a clarifying baking soda rinse (which is followed by a diluted vinegar rinse of 2tsp vinegar to 2.5 cups of water and a deep moisturising treatment), or sulfate-based shampoo followed by a deep moisturising treatment.

Before You Purchase: The Beginner
Originally Posted by juanab
This will not remove the henna itself--henna bonds to the keratin, which is why it's so difficult or impossible to remove. It just removes the resin coating. The lawsone (dye) is not removed.
3a/b, fine, normal porosity, high density

Wash: CJ Daily Fix, As I Am, TJs TTT
RO: YTB
LI: Suave TC + CJ CCCC, brushed through with Denman
Styling: Smooth in LAL Wet Look gel, scrunch, and plop 10 minutes, then add a little more gel, cover with silk cap, and sleep on it
Refresh: 3:1 water/Suave mix as needed