Step 3: Oils are Extracted
Steam: Steam passes through the plant material (leaves, grass, roots, etc.), causing them to release their aromatic components. The steam is then condensed and the essential oil is extracted.
Water (hydro): The plant materials (normally bark, wood, or harder compounds) are submerged in water to make a “soup.” As they are heated, they release their aromatic components into the steam which is then condensed and the essential oil is extracted.
Steam/Water: Indirect steam is applied to the plant material (normally leaves) while water sits underneath the plant material.
Expression: Plant materials (generally citrus rinds) are pressed by machines to squeeze out oils. Also known as “cold-pressed.”