I Tested a Fragrance at 8% but the Supplier Recommends up to 12% — Should I Test Higher Loads If 8% Already Gives Good Performance?

A supplier's maximum is a ceiling, not a recommendation

When an oil's page says "up to 12%" or "up to 13%", it is describing tolerance: the highest load at which the supplier expects the oil to stay usable. It is not saying the candle will be better at that load, and it knows nothing about your wax, jar, wick or customers. Your 8% result is the more relevant fact. It shows that, in your system, 8% already delivers.

So the question is not "should I use the maximum?" but "is there a target that 8% misses?" A few legitimate ones exist. You might be launching a larger jar for open-plan living rooms. You might want a bold line alongside a soft one. You might have customer feedback that throw drops off in the second half of the candle. If none of these applies, keeping 8% is a sound commercial decision, and the rest of this page is optional.

Why 12% is rarely one and a half times as strong as 8%

It is tempting to picture fragrance load like volume on a speaker: half as much oil again, half as much scent again. Candles rarely behave that way. Hot throw depends on how much fragrance the melt pool releases into the air, and that depends on melt-pool size and temperature as much as on how much oil is dissolved in the wax. Once the wax is carrying enough oil for the pool to release well, adding more tends to give smaller and smaller gains.

Meanwhile, the downsides grow. Wax can only hold so much oil comfortably; beyond that, some may sit unbound and appear as surface oil. More oil in the fuel changes what climbs the wick, which can mean more carbon at the tip, a taller or less steady flame and, in the worst cases, soot. Your nose also adapts quickly to a steady scent, so a stronger candle in a closed room can feel no stronger after a while.

None of that means 12% can never help. It means the only way to know is to test it against a target, and to expect a modest gain rather than a dramatic one.

Check your wax's stated maximum before the oil's

The oil's maximum is only half the limit. The wax has its own, and the lower of the two wins. Among CSI's container waxes, the stated fragrance loads differ enough to decide the test for you.

The basis line matters more than it looks. This series expresses load as a percentage of total candle weight, while product pages usually phrase it as a percentage of wax weight. At 12% of total, a 200 g candle holds 24 g of oil and 176 g of wax. As a share of wax, that is 24 ÷ 176 = about 13.6%, which is above the 13%-of-wax-weight figure stated for the Chunks. At 10% of total, the ratio is 20 ÷ 180 = about 11.1% of wax weight, comfortably within 13%.

If your candles are in CSI 464, the practical answer is simple: 10% is the most you should test, and 12% needs a different wax. Changing wax changes more than the ceiling, so treat any move to CSI 468 or the Chunks as a new system that needs its own baseline at 8% before you compare higher loads.

Designing the upward test

Add oil below its published flashpoint and at the wax maker's stated temperature. Cinnamon Vanilla, for example, publishes 270°F (132°C). Stay with every burning test candle and stop any test that smokes or flares; with more oil in the wax, that is more likely at the top of the range.

What each step costs per candle

Cinnamon Vanilla is a useful example because its page states up to 13%, so 8%, 10% and 12% all sit within the oil's own stated range. Its price is ₹4,554.80 per kg. For wax, use CSI 468 at the 5 kg price of ₹3,185.00, which is ₹3,185.00 ÷ 5,000 g = ₹0.637 per gram.

Going from 8% to 12% adds 8 g of oil per candle, which is 8 × ₹4.5548 = ₹36.44. Across a run of 500 candles, that is 4,000 g of extra oil, or 4,000 × ₹4.5548 = ₹18,219.20. The wax saving of ₹5.10 per candle (₹117.21 − ₹112.11) softens the step a little, but nowhere near enough to cover it.

Cinnamon Vanilla also publishes 2.5% vanillin, and its page notes a moderate discolouration risk in light wax. More oil means more vanillin in the candle, so a 12% trial deserves colour photographs beside the 8% candle, not just throw scores.

Reading the result

Compare the loads against the target you wrote down, not against each other. If 10% meets the target and 12% only adds a little, stop at 10%. If neither meets the target, the oil or the system may be the limit rather than the load; more oil is unlikely to be the answer, and a different oil, wax or wick is the better next test.

If 12% clearly meets a target that 8% and 10% missed, and it burns cleanly in a wax rated for it, you have a genuine case for the higher load, and a cost figure to price into the product. In every other outcome, the honest recommendation is to stay at the lowest load that passed. Hot throw often shows diminishing returns as load rises, and an extra ₹36.44 per candle is a lot to pay for a difference customers may not notice.

Where this page fits

CSI already has guides that cover parts of this question. This page answers the specific oil-in-wax question above; these go deeper on the rest:

Three things to buy for this job

Frequently asked questions