DNA & Accord in Perfumery: Building a Signature Fragrance Identity

A perfume's DNA is the identity that sets it apart from the crowd. It is not a single raw material, but the relationship between raw materials. It is that invisible skeleton that makes you say "that's the brand" the moment you open a fragrance family.

DNA is most often built around one or two core accords. That accord remains constant in every version of the formula; the notes layered on top of it change with the season, the customer, or the collection. The core is fixed — the costume is variable.

Trying to grow a product family without establishing a DNA means starting from scratch every single time. Anchor the core once — everything else becomes your signature.

An accord is what happens when two or more raw materials combine to produce a new, unified scent that neither possesses on its own. Think of a musical chord: each note stands alone, but played together they create a third sound.

Taking a single fragrance oil and diluting it with alcohol is not fragrance design — it is simply carrying a raw material. True design means constructing an accord by establishing the weight balance of ingredients. Classic accords such as "Fougère" or "amber" are, in essence, the names given to groups of materials that meet in specific proportions.

Note: the proportions in this table are directional, not a formula. The same materials in different ratios yield an entirely different character. That is why building an accord means measuring and smelling — over and over again.

Building an accord is experimental, but it is not arbitrary. Follow the sequence below and you will move forward without losing your way. Find the core first, then dress it.

The most common mistake new producers make is the assumption: "If I increase the concentration, the fragrance will last longer." This is not true. Longevity and sillage are determined not by concentration alone, but by the volatility of the raw materials. A citrus-heavy, top-note-dominant fragrance oil can fade quickly even at 25%; an amber, oud, and musk-dominant formula can last for hours at just 10%.

This is why, when building your DNA, you are designing not only the concentration but also the note pyramid. When the top notes dissipate, the middle and base layers take the stage — that is where the heart of your accord lies. (Pyramid construction is a topic in its own right; make sure you study how to balance the note layers.)

Another critical point is solubility. If you add too much water to high-grade ethanol, the fragrance oil will not dissolve; cloudiness and phase separation will result. Keep the water content low, start with a small amount of water, and check for clarity. If necessary, use a ready-made perfumer's alcohol or a suitable solvent.

You have built the accord and balanced the concentration. Now the fragrance needs to settle. Maceration is not simply "waiting"; as the alcohol and fragrance oil interact and esterify, the sharp "alcohol bite" softens and the layers meld together.

Rest the blend away from light, in a cool environment (maceration at approximately room temperature ~15–20°C is a widely used approach). Afterwards, apply cold filtration to remove any waxy matter; the result will be both clear and stable. The time required varies by formula — monitor your own blend by smelling it periodically.