What is a roll-on perfume, and how do you make one?
By Omer Siton, founder of PerfuMate · Updated
A roll-on perfume is a perfume in a small bottle with a rollerball, and it is almost always a perfume oil: the same concentrate a spray uses, dissolved in a carrier oil instead of alcohol and rolled straight onto the skin. Making one is the arithmetic of a perfume oil in 10 ml: weigh the concentrate, top it up with carrier, cap it and let it rest for a week or two.
What is a roll-on perfume, or perfume oil?
It is a perfume oil in a rollerball bottle: aromatic materials, the concentrate, dissolved in a carrier that does not evaporate, such as Jojoba oil, Fractionated coconut oil (MCT) or Isopropyl myristate. "Perfume oil", "oil-based perfume", "roll-on perfume oil" and "perfume roller" name the same thing. With no alcohol to lift it, the perfume opens slowly, wears close to the skin and leaves at the pace of its own materials.
The rollerball is only the applicator. Any perfume can go into one, oil or alcohol: the ball lays a thin line of liquid where a spray lays a mist, and the perfume inside is the same. IFRA treats both alike, since its Category 4 covers fine fragrance with or without alcohol, perfume oils included.
How do you make a roll-on perfume?
By weight, in the bottle: a 10 ml roll-on holds about 8.6 g of jojoba oil, which weighs about 0.86 g per ml, so at 20 percent it takes 1.72 g of concentrate and 6.88 g of carrier.
- Choose the concentrate. The seven-line first formula on how to make perfume at home works: run through the IFRA calculator, it stays within every Category 4 limit at 20 and at 30 percent. Its Ambroxan and Vanillin are already 10 percent dilutions in Dipropylene glycol, which matters in oil.
- Weigh the concentrate into the empty bottle on a scale that reads 0.01 g: 1.72 g.
- Add the carrier until the scale reads 8.6 g in all: 6.88 g of jojoba oil.
- Press in the ball, cap it and roll the bottle between your hands until the liquid is clear.
- Label it and let it rest: name, strength, date. A perfume oil wants a week or two, sealed and in the dark, before you judge it.
The same 10 g of concentrate makes the 30 ml eau de parfum on that page (4.5 g) and still leaves enough for three roll-ons. Start at 20 percent, PerfuMate's preset for an oil, and make a second bottle at 30, the top of PerfuMate's 10 to 30 percent range for perfume oils (perfume concentrations, explained): an oil needs more concentrate than an eau de parfum to be noticed, because the carrier holds the smell close. In the perfume making calculator, enter the bottle in grams at the carrier's own weight (8.6 g for 10 ml of jojoba) and the strength; the second figure, which it labels ethanol, is your carrier.
Which carrier oil is best for a roll-on?
One with no smell of its own that does not go rancid:
- Jojoba oil is a liquid wax rather than a true oil, and the catalog describes it as exceptionally resistant to oxidation. It can turn cloudy or solid in the cold and clears again at room temperature.
- Fractionated coconut oil (MCT) is odourless, thin and oxidation-stable, stays liquid in the cold, and does not smell of coconut the way Virgin Coconut Oil does.
- Isopropyl myristate is a light ester that the catalog describes as giving a dry, non-greasy feel and dissolving most aromatics well.
Kitchen oils such as olive or sunflower oxidise, and the rancid smell can arrive before the perfume has finished resting. Alcohol dissolves crystals better than any carrier, so Vanillin, Coumarin and Ambroxan go into an oil as dilutions in Dipropylene glycol or Triethyl citrate, never as powder. How to make perfume oil has the detail.
How do you use fragrance oil in a roll-on?
Treat a bought fragrance oil as a concentrate: dilute it in a carrier, never above the Category 4 maximum on the supplier's IFRA certificate. The certificate states, product type by product type, up to what concentration the fragrance can be used; for a roll-on, read the line for Category 4, fine fragrance.
- Find the Category 4 figure; say it is 12 percent.
- Multiply the fill weight by it: 8.6 g times 0.12 is 1.03 g of fragrance oil at most in a 10 ml roll-on.
- Choose your strength at or below that, weigh the fragrance oil into the bottle and top up with carrier to 8.6 g.
If the certificate gives no Category 4 figure, or the oil is sold for candles and soap only, it is not meant for skin. If the bottle says it is a ready-to-wear perfume oil, it is not a concentrate: wear it as it is, or ask the supplier what is in it. A fragrance oil that clouds in jojoba may dissolve better in isopropyl myristate or fractionated coconut oil; try a 1 g test first. Fragrance oils for perfume and what an IFRA certificate says go further.
How do you apply a perfume oil or roll-on?
Roll a short line where fine fragrance usually goes, the wrists and the sides of the neck, one stroke per spot to start, and add more later if you want it louder.
- How much. Two or three strokes in all is a starting point; add one after an hour rather than five at once. Your own nose stops noticing a perfume long before other people do, so ask someone else.
- Skin, not clothes. The carrier does not evaporate and can mark fabric.
- Making it last longer. A stronger oil, up to the IFRA ceiling of its concentrate; a formula with more slow base materials (the catalog lists Ambroxan at 400 hours on a smelling strip and Lemon Essential Oil at 4); and another stroke in the afternoon. A fixative cannot make a citrus top last: what a fixative does.
- Keep it capped, upright and out of the sun: an open rollerball loses its top notes first.
Roll-on or spray: which is better?
Neither is better in general: a roll-on oil wears closer and opens more slowly, a spray carries further and shows its top notes, so choose by the perfume and by how you want to wear it.
| Question | Roll-on (perfume oil) | Spray (alcohol perfume) |
|---|---|---|
| What carries it | A carrier oil, which stays on the skin | Perfumer's alcohol, which evaporates |
| Opening | Slow and brief; citrus tops lose most of their lift | Lifted by the alcohol; the top notes are heard |
| Projection | Close to the skin | Further, especially at first |
| Suits | Woods, ambers, musks, resins, florals | Citrus, green and fresh formulas |
| Alcohol | None | Most of the bottle |
| IFRA | Category 4, at the concentrate's share | Category 4, at the concentrate's share |
Does a roll-on last longer than a spray? Usually, close to the skin: the carrier does not evaporate and slows the perfume's own evaporation, while alcohol leaves the skin quickly and lifts the top notes on its way out. Is it stronger? Not by being a roll-on: a 20 percent oil holds more concentrate than an 18 percent eau de parfum, yet usually reads quieter, because the oil holds it close. How long either lasts depends far more on the formula's base than on the carrier; perfume oil or alcohol spray compares the two in full.
Do IFRA limits apply to a roll-on?
Yes: IFRA's Category 4 is fine fragrance with or without alcohol, and its limits are shares of the finished product, carrier included, so a 20 percent oil is checked at 20 in the IFRA calculator. The carrier counts as solvent, not as an aromatic material. It matters more for roll-ons than for sprays because they are stronger: a concentrate that passes as a 10 percent eau de toilette can fail as a 30 percent oil without a single line changing.
In PerfuMate a roll-on is a formula like any other: the carriers are catalog materials marked as solvents, the strength you set is the strength the IFRA check reads, and the percentages follow the grams as you weigh. Start a formula, free.
Sources: