Can I recreate a perfume I love?

You can get close, and you learn a great deal trying, but an exact copy is rarely possible. A lab analysis (GC-MS) lists molecules, not a recipe, and naturals and house-only molecules blur what it shows. The practical route is by nose: list the notes, build an accord for each, and compare your version with the original side by side on blotters. What you make is your own perfume; sell it under your own name, never under the brand's.

What can GC-MS tell me?

GC-MS (gas chromatography with mass spectrometry) separates a liquid into its molecules, identifies many of them and estimates each one's share. It is how the make-up of a natural is measured; the catalog's typical figures for Lavender Essential Oil, mostly linalyl acetate and linalool, describe that kind of result. Run on a finished perfume, it shows which prominent molecules are there and roughly in what proportion. That is useful: it can confirm that a note you smell really is Hedione or Iso E Super, and point you at materials you had not thought of.

What can GC-MS not tell me?

• Which bottle a molecule came from. Linalool sits in lavender, bergamot and neroli and is sold on its own as Linalool. The report says linalool, not which of them. Every natural in a perfume shows up as its constituents, scattered and summed with everything else.
• What a natural contributed beyond its main molecules. Much of a natural's character sits in minor components that a list of peaks does not turn back into an oil and a grade.
• Captives. Some molecules are kept by the fragrance house that made them, for its own perfumes. You may identify one and still be unable to buy it. Some are released later: the catalog marks Ambertonic and Calypsone as former captives.
• Bases. A compounded base such as Sandalwood Base X3 is itself a blend, and appears as its parts.

So even a good report is a list of clues. PerfuMate does not turn a GC-MS report into a formula, and the rest of this page does not need one.

Is it legal to recreate a perfume?

A smell in the same style is how perfumery has always moved: accords and ideas are shared. A brand's name, perfume names, bottle and logo are not. Do not sell your version under another brand's name, do not make it look like theirs, and be careful with wording that compares it to theirs, because the rules on that differ by country. This is general guidance, not legal advice. Selling also brings its own obligations; see how to label a perfume for sale.

How do I start from the perfume itself?

Smell it on a blotter at intervals: the first minutes, an hour, four hours, the next morning. Write down what you notice at each one, in plain words, and sort it into the top, heart and base. Then name the ideas in a few words each: "bitter green citrus", "transparent jasmine", "dry woods with a salty amber". A handful of ideas is enough. If a note will not come clear, training your nose on single materials is the slow cure.

How do I turn the notes into accords?

Build one accord per idea, in three to five materials, on strips, before anything meets anything else. A transparent jasmine might start from Hedione; dry woods with a salty amber from Iso E Super and Ambroxan; a clean musk from Ethylene Brassylate. Settle each accord's internal ratios, then dose the accords into one concentrate. How to build a perfume accord covers the method.

How do I compare my version with the original?

Side by side, on blotters, at the same moment. Dip two strips the same way, mark them, and smell them together at the same intervals as before, noting in which band they part. Dilute your trial to a strength close to the original's, or the comparison measures concentration instead of the formula. Change one thing per trial and write down what you changed. Once a version passes the IFRA check at the strength you made it, compare on skin as well.

What if I cannot get a material?

Substitute by role first, then by the notes it carries, then by how long it lasts on a strip. A pair of materials often stands in for one better than any single bottle. The substitutes pages list candidates per material, and how to substitute a perfume material explains the method. If nothing comes close, rebuild the accord around what you have. The perfume that results can be more yours than a near miss.

In PerfuMate the catalog shows each material's notes and typical constituents, the substitutes engine suggests stand-ins for what you lack, and every trial is kept as a saved version, so you can see exactly what changed between the one that was close and the one that was not. Start a formula, free.