In short
A perfume's opening is its first few minutes: the most volatile materials, and the first impression. A good one introduces the composition and hands over to it. The usual beginner fault is a loud citrus with no connection to what follows, so that the perfume seems to change into a different one after twenty minutes.
What you will learn
- Design an opening that connects to the heart
- Use a timed test to find the gap between top and heart
- Judge the first impression fairly
Before this lesson: Create a First Formula: Study Guide
What an opening has to do
- Lift: give the fragrance air and immediacy.
- Announce: hint at the character to come.
- Hand over: fade into the heart, without a gap.
This lesson deals with composition. For the physics, return to volatility, and for classification see top, middle and base notes.
Palette for openings
| Family | Examples | Watch for |
|---|---|---|
| Citrus | Bergamot FCF, lemon | Fades fast; phototoxicity for some oils |
| Aromatic | Lavender, rosemary | Can read as a household product |
| Fresh spice | Cardamom, pink pepper | Very effective in small amounts |
| Aldehydic | Fatty aldehydes | Powerful, and easily dated or soapy. See the aldehydes guide. |
| Green | Leaf alcohol, galbanum | A small dose goes far |
| Fruity | Esters | Can turn juvenile; check they suit the concept |
Designing the link
A top note that shares something with the heart seems to lead into it. Linalool and linalyl acetate are classic links between citrus and floral, as they occur in both worlds. A cardamom top can lead into a rose heart through shared sweetness. Test the idea, since these connections are perceptual and not automatic.
If your opening uses a material much more volatile than the heart, add something of intermediate volatility, so that the two do not simply stop and start. A timed test will show you whether you have a gap.
How much?
A top can be a substantial share of a formula, because top materials leave fast. How much depends on the style. A cologne is mostly top, and a heavy amber might have only a light touch. Start from your brief, not from a fixed proportion. There is no standard pyramid ratio, despite charts you may see.
The test that matters
Make two versions of the formula, one without the top. Prepare strips of both at the same time. Compare them at 1, 5, 15, 30 and 60 minutes. At some point they should become nearly identical. That tells you how long your opening really lasts. If the with-top strip develops a gap around the point where they converge, then the handover is the problem.
A caution on first impressions: on the strip, alcohol hides the first seconds, and the very first sniff is unreliable. Wait until the solvent has gone, and do not chase a reaction to a single sniff. On the other hand, people often decide about a fragrance quickly, as Journal readers learn in how to test perfume, so the opening is not trivial.
Practical exercise: Write two openings for one heart
Use your current formula, or any heart accord from Level 4.
- Write two contrasting opening ideas of two to four lines each. One should be predictable, one less so.
- Add each to separate portions of the heart.
- Prepare strips together, including the heart alone.
- Compare at 1, 5, 15, 30 and 60 minutes, and write when each top has gone and whether there was a gap.
- Choose one, and write what you would adjust next.
You have done this well if you can state when each top fades, and you chose based on the handover and the concept rather than on the first sniff.
Common mistakes
- A beautiful top unrelated to the rest. It sells the first second and disappoints after that.
- Judging only at the first sniff. Alcohol is still present, and nothing has developed.
- Overusing strong aldehydes or greens. Ladder them from a weak stock.
Key terms
- Handover
- The transition as one stage of a fragrance fades and the next takes over. A poor handover reads as a gap.
Knowledge check
Written and reviewed by the RUŌOD Lab team. This is general education, not legal, regulatory, medical or safety advice. Example dilutions and exercises are for learning, are not validated products, and have not been safety-assessed. Completing a lesson confers no qualification. How we check these lessons.