I'm Making Decorative Mould Candles — How Much Fragrance Oil Can I Add Without Affecting the Candle Structure?

Why there is no single number

Fragrance oil is a liquid carried inside the wax. In a container candle, a slightly soft or oily wax is hidden by the glass. In a pillar or decorative mould candle, the wax is the whole structure: it has to set hard, shrink away from the mould so it releases, hold sharp petals and ridges, and stay dry to the touch on a shelf. How much oil a given wax can carry while doing all of that depends on three things at once — the wax, the shape (thin petals and deep detail are more demanding than a plain cylinder) and the oil (oils differ in how readily wax holds them). That is why nobody can honestly give you one percentage for "mould candles".

It is also why the ceilings you may have seen on our container waxes do not apply here. Luxury Soy Wax Chunks are rated up to 13% and CSI 464 up to 10%, but both are container waxes: soft, made to stick to glass. They are not designed to release from a mould, so those figures say nothing about a moulded rose. For the waxes that are used in moulds — Soy Pillar Wax, Fully Refined Paraffin Wax Pellets, Beeswax Pellets and Microcrystalline Wax Slab — no fragrance ceiling is published in our data.

One practical note on that table. Stearic acid is commonly added to soy and paraffin to harden a moulded candle and help it release, and makers often reach for it when they want to carry more oil. CSI's stearic acid was out of stock on the pull date, so this plan does not rely on it. If you already use it, keep your proportion constant across the ladder so it does not muddy the result.

What excess oil commonly does

These are the signs makers commonly see when a moulded candle carries more oil than its wax and shape can hold. They are general candle-making practice, not measured results on CSI products, and some can have other causes — pour temperature and cooling speed among them. Use them as the checklist for your ladder.

Weigh the mould first

Every oil figure starts with the weight of the finished candle, and that is set by the mould. CSI lists sizes for the pillar moulds (for example Tall 11.2 × 6.3 cm and Short 8.6 × 6.5 cm) but not how many grams they hold, and nothing for the decorative moulds. So weigh it. Seal any wick hole with Candle Mold Sealer (₹472.00), fill the mould with water to the pour line, and weigh the water. Wax is lighter than water, so the water weight is an upper bound: make one plain wax pour, weigh the candle, and use that number from then on.

The 250 g and 400 g rows are the illustrative pillar sizes used on this page; the smaller rows cover typical decorative shapes. For multi-cavity moulds, weigh one cavity and multiply by the number of cavities you fill. At these small weights, a scale reading to 0.1 g matters: 7% of 50 g is 3.5 g, and a 1 g error is nearly a 2-point change in load.

The five-pillar test ladder

Here is the ladder with Gardenia as the example oil, in the illustrative 250 g pillar. Oil costs are at Gardenia's 100 g rate (₹4.33 a gram) and wax at ₹600.00 a kilo. The oil costs are small; the reason to run the ladder is the last column.

The mould, sealer and tools are one-off purchases; a second oil's ladder costs only its 100 g bottle and about 1.2 kg of wax. Wick size for a given pillar diameter is not published in our data, so treat your first pillar as a wick check too. Cotton Braided Wicks Ready Made are ₹12.00 each at every pack size; the Braided Wick Roll (61 m with 100 tabs, ₹706.82) suits you once you know your length.

Moulds, and what each is for

Plain pillar moulds are the right place to run the ladder, because a clean cylinder isolates the oil from the shape. Once you have a working load, re-test it once in your decorative mould, since thin detail is less forgiving.

From test to production

Three oils worth running through the ladder for a decorative range. They are chosen for families that suit decorative candles — a floral, a fruit and a woody-resinous — not for measured throw, which we have not published for any oil.

Say the ladder settles Orchard Pear at 8% in Soy Pillar Wax, and you plan 20 illustrative 400 g pillars. That is 640 g of oil and 7,360 g of wax. With a 3% working allowance, the cheapest listed packs are 1 × 500 g + 1 × 100 g + 1 × 50 g + 1 × 15 g of oil (665 g, ₹2,595.02) and 1 × 5 kg + 3 × 1 kg of Soy Pillar Wax (₹4,800.00). Twenty Cotton Braided wicks add ₹240.00. Materials for the run: ₹7,635.02, or ₹381.75 per pillar, before the mould you already own, labour, packaging, freight and GST. A 1 kg of Orchard Pear would cost ₹3,738.00 and leave 360 g for the next run — the kilo is only worth it if that next run is coming.

For the wider pillar picture see How Much Fragrance Oil Should I Use in Pillar Candles? and Best Fragrance Oils for Moulded Candles. If you also sell container candles and wax melts from the same oils, I Want to Make Soy Candles, Wax Melts and Mould Candles — Can I Use the Same Fragrance Oils for All Three? covers running one oil inventory across all three, and I'm Starting a Wax Melt Business — Which Wax, Fragrance Oils, Dyes and Moulds Do I Need? covers the melt side.

Frequently asked questions