Understanding an olfactory pyramid lets you anticipate a perfume's evolution and longevity before you even try it. Here's how to read one technically.
The three tiers and their role
- Top notes (0 to 15 minutes): light, volatile molecules (citrus, aromatic herbs) that evaporate quickly. They create the first impression but don't define the perfume's final character.
- Heart notes (15 minutes to 2 hours): the body of the perfume, typically floral, spicy, or fruity. This phase best reflects the composition's identity.
- Base notes (2+ hours): heavy, low-volatility molecules (woods, musk, amber, resins) that anchor the perfume on skin and determine its overall longevity.
What the 2% reveals
A perfume is roughly 80% alcohol, 2% fragrance oils, and the rest water. Within that 2%, rare natural raw materials (rose absolute, genuine oud) sit alongside synthetic molecules (woody accords, white musks) that structure and extend the effect of natural materials, which are often too fleeting on their own.
Predicting longevity before you buy
A pyramid rich in resinous or woody base notes (labdanum, patchouli, vetiver) signals long wear, over 6 hours. A pyramid dominated by citrus or green notes in the base will fade faster, typically under 3 to 4 hours, regardless of the stated concentration (EDT, EDP).
The technical test
To evaluate a perfume objectively, test it on skin (never on a paper strip alone) and let it evolve for at least two hours before judging: it's the shift from heart note to base note that reveals a composition's true personality.