Cover the bowl with plastic wrap and let the paste sit until dye release is achieved. You’ll know the dye has been released when the surface of the paste turns brownish (as opposed to the original greenish color when you started).Add your “terp.” Terpines are hydrocarbon solvents that release and darken the henna. Tea Tree, Cajeput and Ravensara are the most common terp choices. Aromatherapy grade oils are safest for the skin.Re-cover the henna paste and refrigerate until ready to use (or freeze if you won’t be using it within a few days).
Prep the Henna Paste