Solubol, an emulsifier from France, lets essential oils mix into water as a stable emulsion: blend one part oil with four parts Solubol, then dilute at least twenty times, as for a nebulizer.
At a glance
Oil and water keep to themselves, as every apothecary knows: a few drops of essential oil on water simply float. Solubol is the go-between. Stirred in first, it lets the oil disperse into water as a stable emulsion.