My Fragrance Smells Slightly Different After the Candle Has Gone Through an Indian Summer — Should I Evaluate Heat-Aged Candles Before Approving a Fragrance for Bulk Purchase?

The verdict on the stock you are holding

Before any of the evaluation work, separate two things that feel like one problem. The first is whether the batch in your hands can be dispatched. The second is whether you should commit money to this fragrance again. They have different evidence requirements, and only the first one is urgent.

On dispatchability, the honest position is inspect-then-decide, and the line is drawn on physical condition rather than on scent. A candle whose fragrance reads slightly differently from your memory of pour day is still a candle. A candle with a hairline crack in the glass, a wick that has drifted until it touches the wall, a wick that will not sustain a flame, free oil that has pooled deep enough to sit around the wick base, or a jar that becomes uncomfortably hot to hold during a test burn is not dispatchable, whatever it smells like. Those five checks are the whole gate, and they are gates you can apply to a sample from each storage position rather than to every unit.

On the purchase decision, the position is the opposite: slow down. You are about to convert an observation about one batch into a commitment of several thousand rupees. The rest of this guide is about turning the observation into something that can carry that weight.

Five things that could explain the difference

"Smells slightly different after the summer" has at least five plausible causes, and from a distance nobody can tell you which applies to your batch. What can be written down is the observation that separates them. Read the table as a diagnostic tree rather than a ranking: the right-hand column is the work, and it is mostly work you can do in an afternoon with units you already have.

Notice what the table does not contain: a rate. There is no figure here for how much of anything is lost per month, no temperature at which a given load starts to move, and no conversion from a warm week to a notional month of ambient storage. Those numbers are not published by CSI, they are not available from the product pages, and accelerated storage does not map cleanly onto real time in any case. What replaces them is the comparison you run — which is why the control matters more than any number would.

The 12-unit heat-aged approval test

This is a method, not a standard. The counts and the checkpoints below are choices — twelve units because it splits cleanly into a baseline, a held group and a control with a spare in each, and a hot-season hold because that is the condition you are actually buying against. Adjust the numbers to your batch sizes; keep the structure, because the structure is what makes the result readable.

What the gate costs against what it protects

The argument for a heat-aged gate is arithmetic, not caution. Below is the materials cost of the twelve-unit batch, the cost of the listed packs you would actually buy to make it, and the commitment it sits in front of. Every rupee comes from a CSI product page in September 2026 and the working is shown so you can re-run it with your own wax, oil and jar.

Now the other side. Sandalwood's largest listed pack is 1 kg at ₹5,026.80, which is ₹5,026.80 per kg — and at 9.6 g a candle that kilo is about 104 × 120 g candles, or about 62 × 200 g candles at 16 g each. The gate costs 40% of that bottle. Put differently: if the qualification batch stops you from buying one kilo of an oil that does not hold up in your own store room, it has paid for itself two and a half times over — and you still have eleven of the twelve candles, minus what you burned.

The oil cost per candle is the 100 gm rate multiplied by 9.6 g: Sandalwood ₹5.0268 × 9.6 = ₹48.26, British Rose ₹3.422 × 9.6 = ₹32.85, Jasmine ₹4.30 × 9.6 = ₹41.28, Dark Vanilla ₹7.90 × 9.6 = ₹75.84. Two things follow. First, the gate's cost barely moves between oils — the wax, the jar and the wick carry most of it — so there is no oil for which the test is uneconomic. Second, the more expensive the oil, the more the test is worth running, because Dark Vanilla's kilo is ₹7,646 against British Rose's ₹3,068.

What to buy to run it

Three purchases make the qualification batch, and each card shows every listed pack with the price, the per-unit rate and how many 120 g candles at 8% the pack covers. Buy the smallest pack that completes twelve units. The whole point of the exercise is to postpone the big commitment, so do not let the test itself become one.

Writing the approval decision down

A test that ends in an impression ends nowhere. Before you hold the samples, write the rule you will apply to them — while you still have no stake in the answer. A workable rule has three parts: what you will compare, who will read it, and what each outcome means for the order. Here is a version you can copy and edit; the thresholds are yours to set, and the point of setting them early is that you cannot then move them to suit the result.

Two cautions about this table. It contains no claim that a pass makes the stock safe to sell — that judgement stays with your own inspection and your own customers. And it contains no number for how different is too different, because that is a commercial tolerance rather than a technical fact. A gifting line sold in a box has a different tolerance from a candle a customer smells on a shelf before buying.

What changes in the next purchase

Whichever way the gate goes, three things should change in how you buy after it. They cost nothing and they compound.

Buy fragrance to a hold, not to a year. If your qualification showed that a line reads well after a season in your conditions, buy for that season. CSI lists 15 g, 50 g, 100 g, 500 g and 1 kg on most oils, and on Sandalwood the per-kilo rate is identical at 500 gm and 1 kg (₹5,026.80 either way), so there is no per-kilo reward for over-buying — which means the only reason to buy a kilo is that you will pour it. Where you do need more than a kilo, that is a WhatsApp quote; the listed per-kilo prices are the ceiling for planning, and we will not print a figure for a quantity the site does not list.

Buy the wax in the pack your production rhythm needs. Luxury Soy Wax Chunks list at ₹599 for 1 kg, ₹2,995 for 5 kg and ₹5,999 for 10 kg — effectively flat per kilo — so there is no saving to chase by committing early. Where a wax does step down, it is worth knowing: Premium Coconut Soy CSI 468 moves from ₹650 to ₹637 per kg at 5 kg and 10 kg, and Natural Soy Pearl Wax from ₹450 to ₹424.80.

Keep the retained samples as a standing cost line. Nine held units at ₹167.49 is ₹1,507.41 of stock you are choosing not to sell, per fragrance, per production run. Budget it. A maker running four fragrances is holding about ₹6,029.64 of evidence — cheaper than one wrong kilo of Dark Vanilla, and it is the only thing that lets next year's decision start from data instead of memory.

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