Text graphic labeled 'PERFORMANCE/001' with the bold text 'PERSON TO PERSON' written below.

What Longevity Actually Measures — and Why It Varies Person to Person

Longevity is one of the most complained-about aspects of fragrance — and one of the least understood. The formula does not determine longevity on its own. Your skin does. The same formula applied to two people can last four hours on one and ten on the other, and both results are correct.

Longevity is the product of the interaction between a formula's evaporation rate and the skin surface it is applied to. A formula's evaporation rate is set by its concentration of aromatic materials and by the volatility profile of the base note tier — the low-volatility, high-molecular-weight compounds that remain on skin after the top and heart tiers have departed. But the skin surface itself is a major variable. Skin pH affects the evaporation chemistry: slightly acidic skin — the natural state for most people — allows certain aromatic compounds to bind more effectively to the skin surface, slowing their departure. Dry skin offers less surface lipid for the aromatic compounds to anchor to and accelerates evaporation. Warm skin accelerates all evaporation rates — the temperature differential between body surface and ambient air drives aromatic molecules off the skin faster. None of these variables are controlled by the formula. They are properties of the person wearing it.

A minimalist line-art graph on a white background. The vertical axis is labeled 'PERFUME APPLICATION' and the horizontal axis is labeled 'LONGEVITY/TOTAL DURATION SCENT REMAINS.' A curved line originating from the top of the vertical axis slopes downward toward the right, representing the decline of scent over time. At the bottom right, the text reads 'THE LONDON BATCH PERFUMERY,' and a small chemical molecule icon is located at the top right.

THE INSIGHT

The most significant skin variable affecting longevity is surface moisture and lipid content — not pH, and not temperature, both of which are relatively consistent across people. A well-moisturised skin surface, particularly one that has been treated with an unscented emollient before application, provides a lipid layer that aromatic compounds can bind to and release from slowly. An unmoistened dry skin surface has no such anchor layer — the formula evaporates directly from the skin surface into the air with no retardation. The difference in longevity between dry skin and moisturised skin for the same formula on the same person can be as large as 2–3 hours.

TAKEAWAY

If your fragrance is not lasting as long as expected, the formula is rarely the problem. Apply an unscented moisturiser to the application points before spraying — not scented, which will conflict with the formula, but unscented. Allow the moisturiser to absorb for 2–3 minutes before applying the fragrance. The lipid layer provides an anchor substrate for the aromatic compounds and materially extends the wear time. This is the most effective single intervention for longevity.

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