My Fresh Fragrance Needs a Higher Percentage to Feel Strong but My Woody Fragrance Performs at a Lower Load — Should Every Scent Have an Individually Optimised Fragrance Percentage?

Why families settle at different loads

A fresh fragrance and a woody fragrance at the same percentage are asking the wax to do different jobs. Citrus and other fresh materials are light and volatile. They leave cold wax readily and burn off early in a session, so a fresh candle can feel strong at the start and thin by the end. CSI’s Citrus Lemon page recognises this directly: cure the full 48–72 h and use the upper end of the range.

Woody materials are heavier. Woods, resins, patchouli and musk release more slowly and steadily from a warm pool and tend to linger in the air. A woody candle can therefore reach the same perceived strength with less oil, and pushing it higher sometimes adds weight rather than strength, along with extra fuel for the wick.

That is why the same 8% can leave your fresh candle under target and your woody candle over it. The question is whether giving each scent its own load is worth the extra care in production.

Set one house target, then ladder each scent

Per-SKU loads only work if every scent is aiming at the same experience. Before you test, write down what your house strength means: for example, clearly noticeable from the doorway of a medium room within the first hour, still recognisable later in the burn, and pleasant at the candle. That description becomes the target each load is scored against.

The cost maths for each approach

Suppose the ladders give this result: Citrus Lemon only passes at 10%, and Woody Oud passes at 7%. Here is what each load costs in a 200 g candle using CSI 464 wax and 1 kg oil prices. Wax is included, because a higher load uses slightly less wax.

Totals are the unrounded oil and wax figures added together, then rounded to the paisa, so a total can differ by ₹0.01 from the sum of the rounded cells: for example, Citrus Lemon at 8% is ₹45.31 of oil plus ₹93.36 of wax, ₹138.67 in all.

Woody Oud: the saving

Running Woody Oud at 8% when 7% passes the target spends 16 − 14 = 2 g more oil per candle, which is 2 × ₹4.5312 = ₹9.06. Over a run of 500 candles, a quantity used here purely as an example, that is 500 × ₹9.0624 = ₹4,531.20, which is the price of a full 1 kg pack of Woody Oud.

Citrus Lemon: the honest extra cost

Raising Citrus Lemon from 8% to 10% adds ₹56.64 − ₹45.31 = ₹11.33 of oil, partly offset by 4 g less wax. On the totals above, the candle costs ₹147.97 − ₹138.67 = ₹9.30 more. That is the price of a lemon candle that meets your target rather than one that disappoints.

The two SKUs together

At a single 8%, one lemon candle plus one oud candle costs ₹138.67 + ₹165.86 = ₹304.53. At the tested loads, the pair costs ₹147.97 + ₹157.81 = ₹305.78. The per-SKU approach costs ₹1.25 more per pair, and in exchange both candles now meet the same strength target. The oud saving almost exactly funds the lemon correction.

When a per-SKU load is worth it

Three conditions make an individual load worth the extra care in production.

If most of your scents land within one step of each other, the house load may be good enough and the admin is not worth it. If one or two scents sit far from the rest, as fresh and woody often do, give those their own load and keep the rest together.

When the ladder does not give a clean answer

Not every ladder produces a neat result. Sometimes the fresh scent passes at 8% on one burn and fails on the next, or the woody scent passes at 6% for one scorer and fails for another. That is normal, and it usually means the load sits right on the edge of your target.

When a result wobbles, choose the next step up for production and note the lower load as a possible future saving. A candle that sometimes disappoints is worse for your business than a few rupees of extra oil. For Woody Oud, if 6% wobbles and 7% passes cleanly, take 7%; the saving from 6% would be a further 2 × ₹4.5312 = ₹9.06 per candle, which is worth another careful round later but not worth a risk now.

If the fresh scent will not pass even at its stated maximum, stop raising the load. More oil in a volatile citrus often brings sweating or a heavier flame rather than extra brightness. Instead, compare a second fresh oil. Zesty Lemon, for example, lists up to 10% in soy and its page advises starting at 8% and assessing after a 72 h cure, so it can run the same ladder in the same wax.

Also check that the scent you are comparing against is not too strong. If the woody candle is the one that sets the house standard, and it is unusually powerful, every lighter scent will look under-loaded next to it. The target should be written in words first, not borrowed from your strongest SKU.

Recording the decision so it holds

Write each SKU’s load into your batch sheet as grams per candle, not as a percentage alone. A line that reads Citrus Lemon, 200 g jar, 20 g oil, 180 g wax, wick size, addition temperature is far harder to misread on a busy production day than a line that simply says 10%.

Colour-code or physically separate oils that run above or below the house load, so nobody reaches for the familiar 16 g out of habit. Keep one retained jar of each SKU at its agreed load as the reference for future batches.

Revisit the decision when anything in the system changes: a new wax, a different jar or a fresh purchase of the oil. A woody oil that passed at 7% in one wax may need re-checking in another, and a fresh oil can behave differently across seasons in Indian heat.

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