Top, Heart and Base Notes in Perfume, explained

Why a perfume smells different after ten minutes, and how perfumers build a scent in three layers.

Pim · Cira Group

Spray a perfume and smell it straight away, then again an hour later. It has changed. That isn’t the perfume fading unevenly; it was designed that way. Perfumers build a fragrance in three layers, called notes, that evaporate at different speeds.

Top notes: the first impression

Top notes are the lightest, most volatile materials. They hit you first and usually fade within 15 to 30 minutes. Citrus such as bergamot and lemon, fresh herbs and light spices like pink pepper are classic top notes. Their job is to make the scent inviting from the first second.

Heart notes: the character

Once the top notes lift, the heart appears. These middle notes last a few hours and define what the perfume is really about. Florals such as rose, jasmine and lavender live here, along with softer spices. If someone asks what your perfume smells like, they are usually describing its heart.

Base notes: what lingers

Base notes are the heaviest molecules. They anchor the blend, slow down the lighter notes and stay on skin for many hours. Woods like sandalwood, amber, vanilla and musk are typical base notes. They are what people still notice on your scarf the next day.

A good rule for beginners: roughly 30% top, 50% heart and 20% base, then adjust by the drop.

How we use this in workshops

In every Cira workshop, guests smell each layer on blotters before blending. Starting with the heart, then adding a base and finishing with a top note makes it much easier to build a balanced scent, even if it’s your first time.

Try it yourself

You can feel the difference in a single session. Join a Full Workshop with your team, or try the at-home Perfume Kit and record your own ratios in the Scent Journal.