How to Make and Scent Incense (Sticks & Cones): Formula & Step-by-Step Guide

Incense works by loading a fragrance onto a burning combustion base (a flammable woody/resinous powder), which then slowly volatilises and disperses into the air as heat builds. You provide the scent; fire sets the stage.

There are two principal forms. Stick incense: a scented paste rolled around a bamboo core, or a coreless (Japanese-style) pressed paste. Cone incense: a moulded cone that burns with increasing intensity from base to tip. The skeleton is the same in both: a combustible base (typically wood powder), a binding agent and a fragrance.

The critical distinction here is that incense scents the environment, not the skin (IFRA Category 10A — ambient products). Its logic is therefore entirely different from that of an alcohol-based fragrance (EDP, EDT). In those formats the fragrance dissolves and evaporates; here it undergoes thermal pyrolysis (heat-driven decomposition). Combustion alters the character of the scent — we will come to that in a later section.

The table below is a shared dry base formula for coreless sticks (Japanese style) and cones. Incense is a solid product, so all ratios are expressed by weight (grams).

The recommended fragrance loading rate is 10–20%. The lower end (10–12%) suits volatile scents such as citrus and light florals; the upper end (15–20%) is appropriate for heavy scents such as amber, oud, resins and spices. Water is used to knead the dough; it evaporates during drying and is excluded from the final formula. DPG acts here as a carrier solvent (not a true fixative) — it distributes the fragrance evenly throughout the base and slightly slows volatilisation.

Warning: "The higher the fragrance oil loading, the stronger it burns" is a misconception. Beyond a certain threshold, excess fragrance oil/DPG disrupts ignition — the incense self-extinguishes or burns with heavy smoke. The loading rate alone does not determine performance; the combustion balance of the base does.

There are two approaches: the wet-knead method, in which you build from the base up, and the dipping method, in which ready-made unscented sticks are soaked in fragrance. Here is the primary method first.

Incense is not applied to skin; it is burned. The risk profile therefore differs from that of a fragrance: the primary concerns are flame, smoke and the effect of heat on fragrance chemistry.

Combustion changes the scent. Top notes (citrus, fresh florals) pyrolyse rapidly under heat and can take on a burnt or sharp character. Resins, amber, oud and spices, by contrast, open up with heat and deliver a warm, full scent. For this reason, heavy, heat-stable raw materials are preferred in incense. Do not transfer a formula designed for a cool-environment product (such as a room spray) directly into incense without testing its behaviour under heat separately.

IFRA: Incense falls under Category 10A (scented household products used without burning / leave-on ambient products); the limits are not the same as those for skin-contact Category 4 (fine fragrance). Limits apply not to the total fragrance oil percentage but to individual ingredients and allergens within the fragrance oil. Do not assume that "up to 20% fragrance oil is freely permitted in incense" — always read the IFRA compliance statement for the specific fragrance oil you are using.

Most incense problems are combustion problems: the stick will not ignite, burns with heavy smoke, or loses its scent entirely. The table below covers the most common issues.