Essential Oils in Henna Paste
Are essential oils needed to mix henna? Technically, no, they aren't required, but if you want great henna stains, the right essential oils are necessary.
Essential oils (EOs) can make henna stains substantially darker, but only the right EOs will help your henna paste. Essential oils need monoterpene alcohols to create darker henna stains. These terpenes are hydrocarbon solvents that work on the lawsone (the dye molecule in henna), and that is what releases more of the dye in henna. Safe terpenes include terpineol, geraniol, cineol, cedrol, and linalool, but not all oils containing these compounds are skin safe.