You spray on a perfume and it smells fresh, citrusy, light. Two hours later it is a completely different scent, warm, woody, almost heavy. That is not a flaw in the formula, it is the fragrance pyramid at work.
What is a fragrance pyramid?
The fragrance pyramid describes how a perfume changes over time. Not all fragrance materials evaporate at the same speed. Some molecules are light and volatile, others heavy and slow. Perfumers use this on purpose and build a scent in three layers that become noticeable one after another.
Top note → Heart note → Base note
The result is a perfume that unfolds over hours instead of smelling the same the whole time.
The three layers in detail
1. Top note, the first 5 to 15 minutes
This is the first impression, right when you spray. Top notes consist of small, light molecules that evaporate quickly. That is why you smell them immediately, but only briefly.
Typical top notes
Citrus fruits such as bergamot, lemon and grapefruit, light herbs such as mint and basil, some spices such as ginger and pink pepper.
Role
The top note is the "selling moment" in the shop. During the first test it often decides whether you keep smelling or put the bottle back. That is exactly why it is built to be especially striking in many mass market perfumes.
2. Heart note, from minute 15 to around hour 3
As soon as the top note fades, the heart note takes over. It forms the actual character of the scent. It is what people notice most of the time and usually defines the fragrance family.
Typical heart notes
Flowers such as rose, jasmine and iris, spices such as cinnamon and cardamom, fruity notes such as peach and berries.
Role
The heart note is the "soul" of the perfume. This is where it is decided whether a scent comes across as floral, fruity, spicy or green.
3. Base note, from around hour 3 until it fades
These are the heaviest, slowest molecules. They build up slowly but last the longest. This is the scent still lingering on your skin or clothes in the evening.
Typical base notes
Woods such as sandalwood, cedarwood and vetiver, plus musk, vanilla, amber and patchouli.
Role
The base note gives the perfume depth and longevity. Without it, a scent would simply disappear after the heart note instead of fading out gently.
Example: the fragrance pyramid of The Flow from Züri
Our two eaux de parfum show what this looks like in practice. They start similarly fresh and then develop in different directions.
- Top note: bergamot and lemon, clear and invigorating
- Heart note: magnolia and floral notes, soft and elegant
- Base note: sandalwood, cedarwood and musk, warm and sensual
- Top note: bergamot, grapefruit and black pepper, fresh and lightly spicy
- Heart note: patchouli, magnolia and woody accords, modern and urban
- Base note: sandalwood, cedarwood, amber and moss, deep and warm
Both open with citrus, the volatile top note. After about a quarter of an hour, magnolia takes over in Pour Femme, while patchouli and woods become more present in Pour Homme. In the evening, mainly sandalwood and cedarwood remain on the skin, usually for 6 to 8 hours.
Why you hardly notice your own scent after a while even though it is still there is explained in How long does an eau de parfum really last? And how to find out which scent direction suits you is covered in How do I find my signature scent?
Why this matters for your purchase
The most common mistake when buying perfume happens in the shop. You only smell the top note, you buy, and at home you realise the scent develops in a direction you do not like at all.
That is why the rule of thumb is
- Spray the perfume on your skin, not on paper. Skin temperature affects how the pyramid unfolds.
- Wait at least 30 minutes before you decide.
- Even better, wear it for half a day to really experience top, heart and base notes.
Deciding after 10 seconds in the shop is one of the main reasons people later regret a perfume.
The safest way is to wear a scent for a few days in everyday life. For The Flow from Züri there is the 2 ml sample for CHF 5, fully credited when you buy the bottle.
Not every note is equally present
Some scents are deliberately top heavy, for example light summer fragrances. Others put the focus clearly on the base note, such as heavy oriental scents. There is no "right" balance, only the question of which structure suits your occasion and your personality.
Frequently asked questions
Why does my perfume smell different in the morning than in the evening?
In the morning you probably notice the top or heart note, in the evening only the base note is left. By then the light, volatile molecules have long evaporated.
How long does it take to experience the full fragrance pyramid?
Usually a few hours. Exactly how long depends on the perfume's concentration, your skin and the environment.
Can I tell the fragrance pyramid from smelling the bottle?
Only to a limited extent. The bottle usually shows a mix of all three layers at once. On the skin they only separate because the molecules evaporate at different speeds.
Why does the same perfume smell different on me than on someone else?
Skin temperature, pH and even diet affect how quickly the individual notes unfold. That is why a scent never smells exactly the same on two people.
What are the top, heart and base notes of The Flow from Züri?
Pour Femme opens with bergamot and lemon, has magnolia at its heart and sandalwood, cedarwood and musk in the base. Pour Homme opens with bergamot, grapefruit and black pepper, has patchouli, magnolia and woody accords at its heart and sandalwood, cedarwood, amber and moss in the base.
