Discover the invisible architecture of fragrances. From the first impressions to the lasting base, explore how the temporal olfactory experience that defines each fragrance is built and learn to identify the aromatic evolution that turns a simple scent into a complete sensory symphony.
Definition of Olfactory Notes
The olfactory notes are the different aromatic components perceived at different moments during the development of a fragrance on the skin. This fundamental concept of modern perfumery explains how a fragrance evolves temporally, revealing different aromatic facets according to its molecular volatility and creating a dynamic and complex olfactory experience.
The Olfactory Pyramid: Architecture of the Fragrance
The olfactory pyramid is the graphic and conceptual representation of how a fragrance is temporally structured, dividing the ingredients into three levels according to their volatility and moment of perception.
| Level | Notes | Duration | Volatility |
|---|---|---|---|
| Top | First impression (citrus, herbs) | 15–30 min | Very high |
| Heart | Main character (florals, spices) | 2–4 hours | Medium |
| Base | Structure and depth (woods, musks, resins) | 6–24 hours | Low |
1. Top Notes — The First Impressions
The top notes are the most volatile aromatic components of a fragrance, perceived immediately upon applying and creating the first olfactory impression. They are crucial for initial attraction.
Typical top note ingredients:
- Bergamot — Elegant citrus with floral and spicy facets
- Lemon — Acidic, fresh, energising, clean
- Grapefruit — Bitter, refreshing, slightly green
- Lavender — Aromatic, relaxing, clean
2. Heart Notes — The Soul of the Fragrance
Heart notes constitute the aromatic core of a fragrance, revealing themselves after the evaporation of the top notes and defining the main character of the fragrance.
Typical heart note ingredients:
- Rose — Velvety, romantic, with spicy facets
- Jasmine — Intense, narcotic, slightly sweet
- Cardamom — Fresh-spicy, slightly citrusy, elegant
3. Base Notes — The Lasting Foundation
Base notes constitute the structural foundation of a fragrance, providing depth, duration, and fixation power to the composition.
Typical base note ingredients:
- Sandalwood — Creamy, milky, soft, warm
- Cedar — Dry, clean, elegant
- Vetiver — Earthy, smoky, very long-lasting
- Oud — Complex, deep, resinous
- Synthetic Musk — Warm, sensual, clean
- Vanilla — Sweet, creamy, warm
- Patchouli — Earthy, humid, deep
Olfactory Chords: Aromatic Harmony
An olfactory chord is the harmonious combination of different aromatic ingredients that merge to create a new olfactory identity, greater than the sum of its individual parts. Classic examples:
- Rose Chord: Rose + Geranium + Synthetic Peony + Linalool
- Amber Chord: Labdanum + Benzoin + Vanilla + Musks
- Fougère Chord: Lavender + Geranium + Oakmoss + Coumarin
How Fragrances Develop Over Time
A fragrance tells a story over the course of the day:
- Opening (0-15 min): Maximum intensity of top notes. First olfactory impression.
- Transition (15-60 min): Gradual fading of top notes and emergence of heart notes.
- Heart (1-4 hours): Predominance of heart notes. True character of the fragrance.
- Base (4+ hours): Predominance of base notes. Final, lasting impression.
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