How Essential Oils are Produced

" The extraction of oils is a highly complex and expensive business. Most oils are collected by distillation (steaming) or enfleurage ( in grease). Both methods are time consuming and labor intensive, and require experrt use of complicated equipement and top quality materials. Huge amounts ofplantstock are needed to distill minute quantities of oil: it takes about 250 pounds of rose petals to produce one fluid ounce of essential oil." The Complete Book of Herbs. Apractical guide to growing and usingherbs. by Lesley Bremness DK Books 1988
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