How to apply perfume?

Perfumes are composed of an alcohol base and odorous molecules. They release a pleasant scent for several hours. Their longevity and intensity depend directly on their concentration in aromatic raw materials. The higher this proportion, the richer the fragrance is in base notes, which are the heaviest molecules and evaporate the most slowly, and the more its trail persists over time. Several categories are thus distinguished according to their dosage:

• Fresh water : With a light concentration, generally around 3%, fresh water emphasises volatile top notes. Its gentle scent dissipates after two to four hours. It is an ideal option for sensitive skin or during periods of intense heat, as it provides an immediate sensation of freshness without being overpowering.

• Eau de Cologne : Containing between 3 and 8% fragrant molecules, it also has a short-lasting effect. Historically, it is characterised by a strong presence of citrus notes (bergamot, lemon, neroli), providing a fresh, invigorating scent that fades quickly.

• Eau de toilette : With a concentration of 5 to 15%, it offers a moderate longevity of around four hours. More complex than fresh waters, it allows greater expression of the heart notes (flowers, spices) and is perfectly suited to daily use, particularly during the spring and summer seasons.

• Eau de parfum : With an average aromatic concentration of 15–20%, this is a highly concentrated and long‑lasting formulation. The scent, carried by more powerful base notes (woods, resins, amber), can persist for around eight hours, or even longer depending on the acidity of the skin.

• Perfume : This is the most refined and most intense form, with a concentration that can reach 20 to 40%. Just a few drops are enough to create a deep trail that can last for several days on clothing and more than 24 hours on the skin.

The application of a perfume is a subtle interaction between a chemical composition and the body’s biological heat.

To maximise the diffusion of the notes and ensure the longevity of the trail, the application technique must be precise. When applying your fragrance, target the pulse points where blood circulation is closest to the surface. The neck, nape, hollow of the chest, wrists, and the inner elbows and knees are strategic zones. By releasing continuous warmth, these areas act as natural diffusers that allow the fragrant molecules to unfold progressively throughout the day. For an even distribution, hold the bottle approximately 15 centimetres away from your skin when spraying, in order to avoid an excessive concentration on a single spot.

There is a widespread belief that rubbing your wrists together after spraying perfume helps to distribute the scent more effectively. This gesture should in fact be avoided, as it alters the structure of the fragrance.

Friction generates mechanical heat that breaks apart the most volatile molecules, particularly the top notes, thereby hastening their evaporation to the detriment of the original olfactory structure. To preserve the integrity of your eau de parfum, simply allow the liquid to air-dry on your skin.

The dosage must also be correlated with the concentration of your fragrance. For light formulations, several sprays distributed over the body may be necessary, with the option of reapplying two to three times a day. Conversely, for perfume extracts or highly concentrated eau de parfum, two to three individual sprays are generally sufficient to ensure long-lasting performance. It is also important to remain alert to olfactory habituation : no longer being able to smell your own scent trail does not mean it has disappeared, but simply that your brain has become accustomed to it. If in doubt, seek an external opinion before adding another dose, which could prove overpowering.

Lastly, the surface chemistry of the skin plays a decisive role in how well fragrances adhere. Odorant molecules evaporate much more rapidly on a dry epidermis. To optimise longevity, first moisturise your skin with a neutral treatment. Indeed, lipids, particularly those found in vegetable oils, capture and retain aromatic molecules more effectively. If you prefer to avoid direct contact with the epidermis, scenting clothing is an interesting alternative, as natural textile fibres such as wool or cotton are known to capture odours over the long term. However, be cautious with delicate materials such as silk, as the alcohol contained in the perfume could stain them irreversibly.

Popular belief : Spraying perfume on your hair is a bad idea, because alcohol is harmful to the health of both the hair and the scalp due to its drying effects.

• BOELENS R. & al. Classification of perfumes and fragrances. Perfumer & Flavorist (2001).

• MILINSKI M. Perfumes. Evolutionary Aesthetics (2003).

• MOZDZEN K. & al. Fleeting beauty—The world of plant fragrances and their application. Molecules (2021).