Enfleurage
Enfleurage is the old Grasse method of pressing flower scent into odorless fat, then washing it out with alcohol. How it works, and why solvents replaced it.
Updated
Enfleurage is the method of capturing a flower's scent by pressing it into odorless fat. There is no heat and no solvent: fresh blossoms are laid against a layer of purified animal fat, and over hours the fat draws the aroma molecules out of the petals and holds them. Spent flowers are picked off and replaced with fresh ones, again and again, until the fat is saturated with scent — at which point it is called a pommade. The aroma is later washed out of that pommade with alcohol to make a finished perfume material. The whole point of the technique is patience in place of force: it captures flowers that heat would destroy.
That is the reason it existed at all. Jasmine and tuberose — the two flowers most associated with enfleurage — keep producing scent for hours after picking, and their aroma is too fragile to survive distillation; steam cooks the delicate top off and leaves something duller and hay-like. Fat extraction sidesteps the heat entirely and keeps absorbing as the flower keeps breathing, which is why a tuberose absolute made this way can read truer to the living bloom than a distilled oil. The classic apparatus was the chassis: a wooden frame holding a pane of glass, with fat (the corps) spread on both sides by spatula. Stacked into airtight columns, thousands of these frames filled an enfleurage workshop during harvest. The daily ritual of clearing off the exhausted flowers before re-charging the fat with new ones has its own name — défleurage.
Enfleurage was refined into an industry in Grasse, the Provençal town that became the centre of French perfumery partly because its fields grew exactly the fragile jasmine and tuberose the method suited. It had been practiced in some form since antiquity and was routine by the eighteenth century, but it was always brutally inefficient — a single charge of fat needs to be refreshed dozens of times over weeks, and the labour and flower count are enormous for a small return. So it collapsed almost completely in the 1930s, once volatile solvent extraction became reliable: solvents pull the same scent from the same flowers faster, cheaper, and at far higher yield. Today enfleurage survives mostly as a near-extinct craft, with a few artisanal revivals in Grasse — tuberose among them — and as the historical answer to a problem that headspace capture and CO2 extraction now solve by other means.
- Enfleurage
- A fragrance-extraction method in which fresh flowers are placed against odorless fat that slowly absorbs their scent. The scented fat is then washed with alcohol to recover the aroma as a perfume material. It was used for delicate flowers, mainly jasmine and tuberose, whose scent is destroyed by the heat of distillation.
- Cold enfleurage
- The classic, heat-free form. Flowers are laid on fat spread across glass plates at room temperature and replaced with fresh blooms repeatedly — often thirty or more cycles over several weeks — until the fat is saturated. This is what "enfleurage" usually refers to.
- Hot enfleurage
- A faster variant in which the fat is gently warmed so it absorbs scent more quickly, also called enfleurage à chaud. Note that the unqualified term maceration more often means the alcohol-aging step of a finished perfume, not this — they are different processes that share a name.
- Pommade (corps de pommade)
- The fat once it has absorbed all the flower scent it can hold. The fat body is the corps; saturated with aroma it becomes the pommade — the intermediate product of enfleurage, before the scent is extracted from it with alcohol.
- Défleurage
- The step of removing the spent flowers from the fat after they have given up their scent, so fresh blooms can be charged onto the same fat. In cold enfleurage this is repeated daily through the harvest until the fat is saturated.
- Chassis
- The apparatus: a rectangular wooden frame holding a glass plate, with fat applied to both sides. Stacked into airtight columns, the frames let the fat absorb scent from flowers laid on every surface. A working enfleurage house held thousands of them.
- Absolute (extrait d'enfleurage)
- The finished material. Washing the pommade with alcohol pulls the aroma out of the fat into an extrait, which is refined into an absolute. Solvent extraction also yields an "absolute" from the same flowers, so the two are distinct materials despite the shared name.
- Solvent extraction
- The method that replaced enfleurage in the 1930s. A volatile solvent dissolves the aroma from the flowers into a waxy concrete, refined into an absolute — the same kind of fragile jasmine and tuberose, captured faster and at far higher yield.