Enfleurage in perfumery | A practical guide to this method

Perfumery is a field rich in time-honored techniques and expertise aimed at extracting the very best from fragrant raw materials to create exceptional essences and fragrances. One of these techniques, little known to the general public, is called enfleurage. This involves placing the flowers between layers of animal or vegetable fat to absorb the fragrant molecules. In this article, we take a closer look at this method, and its use in perfume manufacture.

The enfleurage process: How does it work?

Enfleurage is an ancient technique that has been used since the 18th century, primarily in France and Italy. Its purpose is to capture the essence of flowers without altering their natural fragrance. The enfleurage process involves several steps:

Flower selection: Enfleurage can only be performed using fresh, unwilted flowers. The flowers must be carefully selected and harvested at the right time, usually early in the morning, when their concentration of aromatic compounds is at its highest.
Chassis preparation : The flowers are then arranged on frames coated with fat—either animal fat (lard) or vegetable fat (such as coconut oil). The flowers must not touch one another. This is to prevent the scents from mixing.
The absorption of scents: The frames are stacked and left to rest for several days (24 to 72 hours). This allows the fat to absorb the fragrance molecules from the flowers. This step is crucial and requires special attention, as this is when the fragrance is extracted.
Flower renewal: The flowers are replaced regularly until the fat is saturated with fragrance. This process can take several weeks or even several months. It requires a large number of flowers to obtain a sufficient amount of fragrance.
Perfume extraction: Once the fat is saturated with fragrance, the scent molecules are extracted using a solvent, usually alcohol. The resulting mixture is then filtered to recover the fragrant extract, called a «pommade» or «absolute» depending on the extraction method used.

The advantages and limitations of enfleurage

The enfleurage technique has several advantages:

It allows for the extraction of the delicate scents of fragile, short-lived flowers—such as jasmine or tuberose—which cannot withstand hot extraction techniques.
The method is entirely natural and gentle on the raw materials, since it uses neither heat nor harsh solvents to extract the fragrances.
Cold enfleurage best preserves the olfactory qualities of flowers—particularly their freshness and subtlety—unlike more modern methods, which can alter the original fragrance.

However, enfleurage also has certain limitations:

The technique is very time-consuming and labor-intensive. It requires a large number of flowers, regular replacement, and meticulous work to achieve satisfactory results.
The yield from enfleurage is low, which explains why this method is used primarily for niche perfumes or high-end creations.
The fats used in enfleurage can sometimes impart an undesirable scent to the final product.

Alternatives to enfleurage in perfume production

Although there are now extraction techniques that are more modern and less expensive than enfleurage, this method remains popular among perfumers and lovers of natural scents for its ability to preserve the olfactory quality of flowers. Among the alternatives to enfleurage are:

Steam distillation: This technique involves passing water vapor through aromatic raw materials, thereby releasing their fragrant molecules. The vapor is then cooled and condensed to produce a fragrant liquid called «essence» or «essential oil.».
Supercritical CO2 extraction: This innovative process uses carbon dioxide under specific temperature and pressure conditions to extract aromatic compounds from raw materials. It has the advantage of being highly selective and preserving the olfactory quality of the extracts, while also being faster and less expensive than enfleurage.
Volatile solvents : The use of chemical solvents such as hexane or ether also allows fragrances to be extracted from raw materials. This method has been criticized for its environmental impact and the health risks it poses.

Thus, although enfleurage is an ancient and costly technique, it remains the gold standard when it comes to’extraction of delicate, refined scents. Visit perfumers And lovers of authentic perfumes continue to appreciate this method for its ability to preserve the olfactory quality of flowers and respect the raw materials. Modern alternatives, while faster and less expensive, still struggle to match enfleurage in terms of the purity and subtlety of the scents produced.