Eau de toilette, eau de parfum, extrait: the ladder printed on perfume boxes looks like a simple strength scale, and that is the first misconception this silo dismantles. Concentration describes the percentage of aromatic oils in the formula, not automatically how loud, long-lasting, or good a fragrance is. The questions here walk the full ladder rung by rung, from eau de cologne through eau de toilette and eau de parfum up to extrait de parfum, explain why an extrait typically outlasts an eau de toilette, and compare alcohol-based and oil-based construction. They also confront the arithmetic every buyer eventually runs in their head: how long a 50 ml bottle actually lasts with regular use, why price per milliliter varies so widely, what shelf life to expect once a bottle is opened, and how to stretch an expensive perfume without rationing the pleasure out of it. The odder corners of the format world are covered as well, from splash bottles that skip the sprayer entirely to the line between body perfume and home fragrance, two products that share notes but not a purpose.
The second half of the silo leaves the Western spray bottle behind. Attars, mukhallats, bakhoor, and dehn al oud belong to a parallel tradition of concentrated, oil-based perfumery with its own gestures and its own logic, covered here from definition to application, including why attars are more concentrated than Western perfumes and how to choose between an attar and an eau de parfum. Back on practical ground, you will find the formats that make discovery affordable and travel painless: samples, decants, travel atomizers, solid perfumes, splash bottles, and refillables, plus guidance on choosing between 30, 50, and 100 ml, which format to buy first, and which format earns its place in a suitcase. The hands-on questions get hands-on answers: how to transfer perfume into an atomizer without losing half of it, where to find decants you can actually trust, and why a growing number of houses now offer refillable bottles. Limited editions and vintages close the set, since both change what a bottle is worth and how long it should be expected to keep.
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Concentration decides how a composition unfolds over the hours, so the hub on the olfactory pyramid is the natural companion to this one. For the vocabulary underneath these labels, from dilution to the alcohol base, olfactory basics defines the terms. And since format strategy is really buying strategy, testing, tasting, buying shows how samples, decants, and discovery sets fit into a purchase process that avoids expensive regret.
An alcohol-based perfume dissolves the aromatic concentrate in ethyl alcohol at 70 to 85 percent by volume, with a small fraction of water and the perfume concentrate itself. Ethanol is highly volatile, evaporating within seconds of contact with warm skin and carrying the most volatile molecules (the top notes) into the surrounding air in a rapid burst. This deliberate opening is a defining feature of the Western perfumery tradition codified in Grasse and refined in twentieth-century French perfumery.
An attar is an oil-based concentrate without ethanol, typically blending precious naturals (rose, oud, sandalwood, musk) in a fixed carrier oil and applied by touching a glass stopper to the wrist or neck. An Eau de Parfum is an alcohol-based composition with 15 to 20 percent fragrance oil in ethanol, delivered by spray atomizer for broad projection. The two formats answer different traditions: attars trace back to Mughal and Arab perfumery, EdPs were codified by twentieth-century French houses.
A body perfume is formulated for skin: ethanol or fixed oil as carrier, fragrance concentration tuned to interact with body temperature, lipid film, and personal chemistry. It moves with the wearer, evolves over a wear cycle of 4 to 12 hours, and signals identity. Skin chemistry is part of the composition and explains why the same EdP smells different on two people.
An eau de parfum (EdP) contains 10 to 20 percent aromatic concentrate dissolved in ethanol; an extrait de parfum (or parfum) contains 20 to 40 percent. The extrait is the highest standard alcohol-based concentration in Western perfumery. Its higher oil loading produces longevity of 8 to 16 hours on skin (occasionally longer), shifts the olfactory arc toward heart and base notes, and tightens the projection envelope to a more intimate radius.
An eau de toilette (EdT) contains 5 to 15 percent aromatic concentrate in ethanol; an eau de parfum (EdP) contains 10 to 20 percent. The ranges overlap at 10 to 15 percent, which is why the line between an upper-range EdT and a lower-range EdP is not always sharp. On comparable skin, an EdT typically lasts 3 to 6 hours and an EdP 6 to 8 hours, sometimes more.
An eau de cologne (EdC) contains 2 to 5 percent aromatic concentrate in ethanol; an eau de toilette (EdT) contains 5 to 15 percent. On comparable skin, a cologne lasts 1 to 2 hours with re-application possible throughout the day; an EdT lasts 3 to 6 hours from a single application. Both are alcohol-based, both are sprayed, and both sit below the EdP tier.
A typical perfume atomizer delivers approximately 0.1 ml per spray, so a 50 ml (1.7 oz) bottle contains around 500 sprays. At 3 sprays per wear and daily use, that is roughly 167 wears, or just under 6 months. At 4 sprays per wear, around 125 wears, or about 4 months. These figures are industry baselines confirmed by sample-decanting practice in the niche community.
An attar comes in a small glass bottle, typically 3, 6 or 12 ml (0.1, 0.2 or 0.4 oz), sealed with a ground-glass dabber stopper. To apply, remove the stopper, invert the bottle briefly so a thin film of oil coats the stopper, then touch the stopper to the chosen skin area. The stopper is touched, not dragged or rubbed: a light press deposits the oil precisely where it is wanted.
Longevity on skin is governed by the formula (concentration tier, fixative content, choice of base materials), the wearer (skin lipids, hydration, pH, recent showering), and the environment (temperature, humidity, clothing). The most effective single intervention is moisturizing skin 10 to 15 minutes before spraying with an unscented lotion or body oil: aromatic molecules cling to lipid film, and a hydrated surface holds the fragrance two to three hours longer than dry skin.
Transferring perfume into a smaller atomizer is a routine practice in niche enthusiast use: a 5 to 10 ml (0.17 to 0.34 oz) travel atomizer fits airline cabin baggage rules, protects the main bottle from damage, and lets the wearer carry several fragrances at once. The technique depends on whether the source bottle has a fixed spray pump, a splash opening, or a screw-on dabber. Three methods cover almost every case.
An attar, from the Persian itr meaning essence, traditionally designates a single aromatic material distilled directly into a carrier oil, most often sandalwood. The classic example is rose attar, where rose petals are hydro-distilled and the vapor is captured into sandalwood oil that acts as both fixative and olfactory partner. The result is intentionally focused on one material; depth comes from extraction quality, not from blending complexity.
A brand sample is produced by the perfume house itself, filled and sealed under controlled conditions, and distributed through boutiques, e-commerce or discovery sets. Typical sizes range from 1.2 ml to 2 ml (0.04 to 0.07 oz) in spray vials. Authenticity is guaranteed by the source, and the formula matches the current production batch.
A home fragrance is any product designed to scent an enclosed space rather than the skin. The category covers scented candles, reed diffusers, room sprays, incense sticks and cones, electric diffusers and ceramic warmers. Composition principles overlap with personal perfumery, but concentration, volatility profile and diffusion mechanics are tuned for air rather than skin chemistry.
A limited edition in perfumery is a release deliberately constrained in quantity, time, or distribution channel. The constraint may apply to the formula itself, to the packaging, to the concentration, or to all three simultaneously. Production volumes are announced or implied as smaller than the standard line, and the release date and end date are usually published or signalled.
A mukhallat is a perfume built by blending several aromatic raw materials into an oil base, without alcohol. The Arabic root khalata means to mix, and the word designates the act of composition as much as the finished object. Mukhallats are the backbone of Gulf and broader Arabian perfumery, with documented composition practice going back several centuries and contemporary production concentrated in the United Arab Emirates, Saudi Arabia, Oman, Bahrain and Kuwait.
A decant is a fragrance portion transferred from an existing full bottle into a smaller container, typically a glass spray atomiser. The operation happens outside the production chain, after the brand has sealed and shipped the original flacon. Decants are produced by independent retailers, decant communities, private collectors and split groups, with volumes most often between 2 ml and 10 ml (0.07 oz and 0.34 oz).
A perfume sample is a small portion of a fragrance produced by the brand itself, filled and sealed inside the production facility, and distributed to consumers as a test format before a full bottle purchase. Typical sizes are 1.2 ml, 1.5 ml or 2 ml (0.04 to 0.07 oz) in glass spray vials, with smaller paper blotter cards used for in-store first impressions and miniature bottles of 5 to 15 ml (0.17 to 0.5 oz) for travel sets and gift contexts.
A vintage perfume in current usage means a bottle produced in an earlier era of the same fragrance, typically before a known reformulation. The fragrance carries the same name as the current version on the shelf, but the formula inside differs, sometimes subtly, sometimes substantially. Drivers include IFRA Standards restrictions on raw materials, scarcity or banning of specific naturals like real oakmoss or animal-derived musks, and deliberate compositional changes by the brand.
A refillable perfume is one where the outer bottle is designed to be reused, with the fragrance inside replaceable through a refill mechanism. The format separates the permanent object (the flacon, often a substantial piece of glass, metal or ceramic) from the consumable (the fragrance load itself). Refills come as cartridges that slot into the bottle, as larger source bottles for direct pour, or as boutique fill services that decant from a stock reservoir into the customer's own bottle.
A solid perfume is a fragrance suspended in a wax and oil base, formed into a compact stick, tin, or pot, and applied directly to skin by finger. The format contains no alcohol: the wax provides structure, the oil carrier holds the fragrance compounds, and body warmth at application releases the volatile materials onto skin. Typical compositions use beeswax, jojoba oil, sweet almond oil or coconut oil, loaded with 15 to 25 percent fragrance oil.
A splash perfume is a flacon sealed with a stopper or screw cap rather than a spray pump. Application happens by tipping the bottle onto a fingertip, into the palm, or directly onto the skin. The format predates the industrial spray atomizer, which became dominant in mainstream perfumery only during the second half of the twentieth century. Before that point, all fragrances were splash by default.
A travel atomizer is a refillable spray flacon, typically 5 to 30 ml (0.17 to 1 oz), fitted with a fine-mist atomizer pump. It is filled from a full-size bottle and carried separately so the original flacon stays at home. The format protects the original bottle from breakage, fits comfortably within the 100 ml hand-luggage liquid limit set by most aviation security authorities, and makes it practical to wear a niche fragrance during the workday or on a trip without committing a 50 ml or 100 ml flacon to your bag.
An attar (also spelled ittar) is an oil-based perfume produced by hydrodistilling flowers, woods, herbs, or spices into a base of liquid sandalwood oil. The Arabic root itr means fragrance. No alcohol enters the traditional formula; sandalwood acts simultaneously as solvent, carrier, and fixative. The result is a viscous oil that lasts 15 to 24 hours on skin, with projection that radiates close to the body rather than diffusing outward.
An eau de cologne is an alcohol-based perfume carrying 2 to 5% aromatic compounds in ethanol, the lightest standard concentration in the fragrance format spectrum. Longevity on skin runs one to two hours and projection is fresh and brief, built around top notes that evaporate quickly. The category name traces back to the city of Cologne (Germany) and a citrus and herb composition created there in 1709 by Italian perfumer Giovanni Maria Farina.
An eau de parfum (abbreviated EDP) is an alcohol-based perfume containing 10 to 20% aromatic compounds by volume in ethanol. The remaining mass is alcohol with a small fraction of water. Longevity on skin typically runs six to ten hours under normal conditions, and projection sits between the lighter eau de toilette and the heavier extrait. The EDP is the working default of contemporary niche perfumery.
An eau de toilette (EDT) is an alcohol-based perfume carrying 5 to 15% aromatic concentrate in ethanol, with most formulations sitting between 8 and 12%. The higher alcohol-to-oil ratio gives the EDT a fresher, lighter opening than an eau de parfum, with longevity that typically runs three to six hours on skin. The format was the dominant designer perfume concentration through most of the twentieth century before the EDP overtook it in niche releases.
An extrait de parfum (also labelled parfum, perfume extract, or pure perfume) is the densest standard alcohol-based concentration, carrying 20 to 40% aromatic compounds dissolved in ethanol. Longevity on skin typically runs 8 to 24 hours, and on fabric the trace can persist for days. Price per millilitre typically runs 50 to 200% above the equivalent EDP, reflecting both the higher oil load and the material grade that the format invites.
An oil-based perfume uses a fixed carrier oil instead of ethanol as the solvent and diluent for the aromatic concentrate. The most traditional oil base in classical Eastern perfumery is sandalwood oil; modern producers also use jojoba, fractionated coconut, sweet almond, or odourless paraffin oil. The aromatic compounds are dissolved into this base and applied directly to skin, with no alcohol burst at the opening and no rapid evaporation phase.
The term bakhoor comes from the Arabic word for incense or fumigation. In contemporary usage, it refers to agarwood chips, processed wood blends, or compressed wood pellets that are burned on a piece of heated charcoal inside a traditional incense burner called a mabkhara. The rising smoke carries the aromatic compounds from the wood into the surrounding space, perfuming fabrics, walls, hair, and clothing. It is a household and ceremonial format, not a wearable perfume.
The phrase dehn al oud translates from Arabic as "oil of oud" or "essence of oud." It refers to the pure distilled oil of agarwood, the resin-saturated heartwood that Aquilaria trees produce when they are infected by certain moulds (Phialophora parasitica and related species). Without infection, Aquilaria heartwood is pale and largely odourless; the dark, fragrant resinous wood that supplies the perfumery market is the tree's defensive response to the fungal attack.
An opened perfume bottle generally remains usable for two to five years under stable conditions. The exact window depends on concentration, ingredient profile, and storage discipline. Three mechanisms drive degradation: oxidation as oxygen enters the bottle with each opening, photodegradation as ultraviolet light breaks down aromatic molecules, and thermal degradation as heat accelerates chemical change. Citrus-dominant top notes and unstabilized aldehydes are the first to suffer; resinous bases, woods, and synthetic musks hold up far longer.
Perfume concentration refers to the percentage of aromatic compounds, called the concentrate or compound, dissolved in a carrier, almost always denatured ethanol with a small share of water. The widely cited industry conventions are 2 to 5 percent for eau de cologne, 5 to 15 percent for eau de toilette, 10 to 20 percent for eau de parfum, and 20 to 40 percent for extrait de parfum. Attars and oil-based perfumes use entirely different carriers, typically sandalwood or jojoba oil, with aromatic loads of 50 to 80 percent.
A decant is a smaller volume of perfume drawn from a larger source bottle and transferred into a labeled glass vial, usually a 1 ml, 2 ml, 5 ml, or 10 ml spray or dabber. Decanting is how collectors test, share, and travel with niche fragrances that would otherwise require a full bottle commitment of 180 to 350 € (200 to 400 USD). The format is widespread in the fragrance community, but quality varies sharply with the source. The single most important variable is the reputation and documentation of the splitter.
Most niche houses sell their main line in three sizes: 30 ml (1 oz), 50 ml (1.7 oz), and 100 ml (3.4 oz). Per-milliliter pricing usually decreases with volume, often by 20 to 35 percent between the 30 ml and the 100 ml of the same reference. That discount only pays off when the wearer actually finishes the bigger bottle before the formula begins to drift, which is typically four to seven years after opening depending on storage and composition.
Two constraints shape travel choices: liquid security rules at airports, and the fragility of glass bottles in transit. The widely applied carry-on rule allows liquid containers of 100 ml (3.4 oz) or less, fitted within a one-liter clear bag, one bag per passenger. Original bottles of 30, 50, and standard 100 ml comply; 100 ml or 200 ml or larger bottles must go in checked luggage. The fragility constraint argues for smaller, sturdier formats whenever possible.
The most common entry mistake in niche perfumery is buying a full bottle of a fragrance tested only briefly in a boutique. Niche bottles typically run 120 to 400 € (135 to 450 USD), and skin chemistry, fatigue, and ambient load all shift perception between the boutique test and life at home. A fragrance that opens beautifully on a paper strip can read quite differently after six hours on skin in the user's normal environment.
A traditional attar carries aromatic materials directly in a fixed oil base, most often sandalwood oil. Because no alcohol or water is added as diluent, the aromatic load reaches 50 to 80 percent of total volume, and in some artisanal preparations the entire product is functionally aromatic, since the sandalwood carrier itself contributes to the scent profile. By contrast, an alcohol-based eau de parfum contains 10 to 20 percent aromatic concentrate dissolved in roughly 80 percent ethanol with a small share of water.
Refillable perfumes have moved from niche experiment to recognized format in the past decade. The principle is straightforward: the wearer buys a permanent bottle once, then replenishes it from refill units that exclude the decorative outer packaging. The format addresses three issues at once: the packaging waste produced by single-use perfume bottles, the relatively weak repeat-purchase mechanics of an industry where switching fragrances is easy, and the per-milliliter cost for buyers who stay loyal to a single composition. Houses such as Le Labo, Mugler, Atelier des Ors, Hermès, Diptyque, Maison Francis Kurkdjian, and L'Artisan Parfumeur all run refillable lines today.
The dominant reason an extrait outlasts an eau de toilette is the ratio of aromatic compounds to volatile carrier. An extrait carries 20 to 40 percent aromatic concentrate; an eau de toilette carries 5 to 15 percent. After application, the ethanol carrier evaporates within minutes at skin temperature. What remains is the aromatic fraction, and the extrait simply leaves more of it. The longevity gap typically runs from three to six hours for an EDT against eight to fourteen hours for a comparable extrait, with longer wear possible on receptive skins.
Perfume retail prices span an extraordinary range. A mass-market eau de toilette can sell at 0.5 to 1.5 € per ml (0.55 to 1.70 USD), a niche eau de parfum typically runs 3 to 8 € per ml (3.40 to 9 USD), and the most exclusive extraits, artisan attars, and oud-based compositions can exceed 50 € per ml (55 USD). The four main drivers behind that spread are raw material cost, production scale, packaging investment, and brand positioning. Each can shift the final price by orders of magnitude on its own.