Working the Bench II by Crane Justine

Author:Crane, Justine [Crane, Justine]
Language: eng
Format: epub
Publisher: Unknown
Published: 2016-02-08T16:00:00+00:00

CHAPTER 9

“More and more people are curious about the art behind perfume and scent.”— Tammy Violet Frazer

The Chemistry of Natural Raw Materials . . .

Essential Oils

Essential oils are aromatic isolates of steam or hydro distillation, or in the case of citrus oils, they are the result of cold-pressing citrus peel. Each essential oil is composed of hundreds of molecules, some contributing to the scent of the oil, some not. The same process of steam or hydro distillation can be applied to isolate certain naturally occurring molecules from previously distilled oils or raw plant materials creating natural isolates. The nature of steam and hydro distillation are processes of molecular isolation of volatile components of plant material, however, instead of fractioning off the molecules by weight, all molecules, from the lightest to the heaviest, are included in the final result – a whole essential oil. Redistilled essential oils are the result of a re-distillation of the oil from a primary distillation, and not the re-distillation of the same plant material. A chemist will redistill an essential oil in order to remove certain unwanted chemicals through fractional vacuum re-distillation, such as terpenes and furanocoumarins , which render the redistilled oil safer or more desirable in terms of flavor and/or fragrance. Some ‘natural isolates’ are the result of fractional vacuum re-distillation of the oil from a primary distillation of plant material .

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