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How to Make Incense Sticks: Dipped, Rolled and Coreless

The three ways incense sticks are made — dipping blanks, rolling masala paste, extruding coreless sticks — with fragrance loads, drying, burn tests and records.

Short answer

Incense sticks are made in three main ways: dipping unscented blanks (a bamboo core coated with a combustible paste) in a fragrance-oil solution, rolling a fragrant paste of powders, resins and a natural binder onto a bamboo stick (the masala method used in much Indian agarbatti), or extruding a dough of wood powder, aromatics and a binder such as makko into coreless sticks and cones (the Japanese style). Dipping is the easiest place to start. Whichever method you use, weigh the uptake, dry slowly, burn-test each batch, and keep a batch record — incense is a consumer product burned indoors, in IFRA Category 12.

The three methods compared

Incense stick methods
MethodWhat carries the scentSkill and equipmentCharacter
Dipped blanksFragrance oil absorbed into a ready-made combustible coatingLow; containers, a drying rack, a balanceDefined by the oil; the base adds some smoke character
Masala (hand-rolled)Aromatic powders, resins and oils in the paste itselfMedium to high; mixing and rolling by handComplex, smoky, resinous; varies batch to batch
Coreless (extruded or hand-shaped)Woods, resins and spices mixed with a binder such as makkoMedium; mixing, extrusion or shaping, slow dryingClean burn without a bamboo core; subtle, wood-led

Dipping blanks

Blanks — sometimes called "punk sticks" — are bamboo sticks coated with a paste of wood powder, charcoal and binder that burns steadily. You supply the fragrance.

  1. Make the dipping liquid. Fragrance oil is commonly diluted in a low-volatility, low-odor carrier — dipropylene glycol is often used — so it spreads evenly and the sticks do not take up neat oil. Trial two or three strengths, for example 30%, 50% and 70% fragrance in the carrier; there is no universal ratio.
  2. Weigh the blanks as a bundle before dipping.
  3. Dip or soak the coated part in a tall, closed glass or stainless container until the coating darkens evenly — seconds to minutes, depending on the blank. Record the time.
  4. Drain standing upright, then dry in a ventilated place away from sun, heat and flames until dry to the touch, often a day or more.
  5. Weigh again and calculate the uptake (below).
  6. Cure in a closed container for a few days before burn-testing.

The arithmetic of uptake

An invented example: 50 blanks weigh 60.0 g. After dipping and draining they weigh 85.0 g; after a day's drying, 80.0 g.

  • Liquid retained after drying: 80.0 − 60.0 = 20.0 g, or 20.0 ÷ 50 = 0.40 g per stick.
  • Retained liquid as a share of the finished stick: 20.0 ÷ 80.0 = 25.0%.
  • If the dipping liquid was 50% fragrance oil and the carrier hardly evaporates, about 10.0 g of fragrance oil is in the batch, roughly 0.20 g per stick. Volatile parts of the oil will have been lost in drying, so treat this as an upper estimate.

Weighing makes batches comparable: if next month's sticks take up 0.30 g each instead of 0.40 g, you know before the first burn that they will be weaker. The conventions for stating a fragrance load are in fragrance load calculation.

Masala sticks

In the masala method the scent is built into the paste: powdered woods (sandalwood, agarwood, cedar), resins (benzoin, frankincense), herbs and spices, sometimes honey or other natural sweeteners, a combustible base such as charcoal or wood powder, and a binder — in Indian practice often jigat (joss) powder, made from the bark of Litsea glutinosa. Water is added to make a dough, which is rolled by hand around a bamboo stick, often rolled again in a dry powder, then dried. Perfume oils may be added to the paste or the finished stick.

Because every powder is a natural material with its own variation, masala incense benefits from the same habits as natural raw materials: record each powder's supplier and lot, keep a retained sample, and smell (and burn) new lots before use. See incoming raw material checks.

Coreless sticks and cones

Japanese-style incense has no bamboo core. Finely powdered aromatics are mixed with makko, a powder made from the bark of a tree in the laurel family (Machilus thunbergii) that both binds the dough and helps it burn evenly, plus water. The dough is extruded through a die or rolled by hand into sticks or shaped into cones, and dried slowly and evenly so the sticks do not crack or warp. The balance of combustible base to aromatics is the key variable: too little base and the stick goes out; too much and the scent is thin. The culture of listening to incense in Japan is introduced in the RUŌOD Journal's guide to kōdō.

Composing a fragrance for smoke

Like bakhoor, incense is judged burning, not in the bottle. Resins, woods, ambers and musks dominate; bright citrus and delicate florals barely register. Materials that char to harsh notes show up only on a burn test. Compose with the incense materials in incense and resins in perfumery, and test small batches before committing. The soaked-wood format is covered in how to make bakhoor.

Burn testing

  • Burn time per stick or cone, and whether it is consistent across the batch.
  • Staying lit — sticks that go out point to too little combustible base or too much oil.
  • Scent in a closed room of known size, judged on entering, on a written scale.
  • Smoke and ash — amount, color, whether the ash falls cleanly.

Keep the room, the holder and the scale the same between batches, and compare against a retained stick from the last approved batch.

Safety and rules

  • IFRA's guidance places joss sticks and incense sticks in Category 12. Ingredient concentrations are not restricted for skin sensitization there; prohibited materials remain prohibited.
  • Burning produces smoke and fine particles. Directions should call for a ventilated room, a heat-proof holder, distance from flammable material, children and pets, and never leaving incense burning unattended.
  • The dipping liquid and the fragrance oil are chemicals with safety data sheets; store and handle them accordingly, as in perfume lab safety.
  • Labels in the EU, Great Britain and the US depend on how the product is classified; see home fragrance labeling. Other markets set their own rules.

Records

For each batch record the blanks or powders (supplier, lot), the fragrance (formula, version, batch), the dipping liquid's composition, weights before and after dipping and drying, drying and curing times, and burn-test results. Incense is one of the products in home fragrance formulation.

Sources

Frequently asked questions

Can I dip blanks in neat fragrance oil?

You can, but uptake is harder to control, cost per stick rises, and very oily sticks may burn poorly or sputter. A carrier gives more even, repeatable results.

Why does my incense smell different burning than in the bottle?

Heat destroys some materials and releases others; the base itself also smells as it burns. Judge the fragrance only from a burn test.

How long should incense dry?

Until it is dry to the touch and its weight has stopped falling; then cure it closed for a few days. Record the time so the next batch can match it.

Written and reviewed by the RUŌOD Lab team. This article is general education about perfume formulation and record-keeping; it is not legal, regulatory or safety advice, and the examples are illustrations, not validated commercial formulas. How we write and check these guides.

Formulate with the arithmetic done for you

RUŌOD Lab scales any formula by total weight, by a factor or by one material's weight, so a candle or diffuser batch is worked out as easily as a perfume.