Absolute

An absolute is the most concentrated aromatic extract perfumery gets out of a plant — a dense, oily liquid that can run 80 to 90 percent aromatic material. It is defined by how it is made, not by how strong it smells. An essential oil is distilled or pressed; an absolute is solvent-extracted. That single difference in method is the whole point of the word, and it is what separates an absolute from the essential oil people assume it is just a richer version of.

The production runs in two stages, and the absolute is the second of them. Fresh flowers or other plant material are washed with a hydrocarbon solvent — historically hexane, increasingly supercritical CO2 — which dissolves the aromatic molecules along with the plant's waxes and pigments. Evaporate the solvent and you are left with a fragrant, waxy, semi-solid mass: the concrete. To make the absolute, that concrete is then washed with high-proof ethanol, which takes up the aromatics but leaves most of the wax behind. Chill the ethanol to around minus fifteen Celsius so the last waxes drop out, cold-filter it, evaporate the alcohol, and the fully aromatic oil left in the flask is the absolute.

This pathway exists because some of perfumery's most valuable smells cannot survive a still. Jasmine, tuberose, narcissus, and mimosa yield no usable steam-distilled oil — the heat destroys the fragile esters and lactones that make them smell the way they do — so the only way to capture them is solvent extraction, or the older fat-based method, enfleurage. That is why jasmine and rose absolute are workhorse naturals while a steam-distilled jasmine oil barely exists. It also makes them expensive: a single gram of jasmine absolute takes on the order of 8,000 hand-picked blossoms. One caution on the label: a release named something like "Absolu" or "Absolue" is using a marketing concentration name, not telling you the bottle is full of absolutes — that sense is unrelated to the raw material described here.