My Candle Has a Large Melt Pool but Still Weak Hot Throw — Does That Mean Increasing Wick Size Is Unlikely to Solve the Fragrance Problem?

Is your pool really big enough?

Plenty of pools look large and aren't finished. A pool that reaches the glass at hour five, one that touches one side only, or one that is wide but a skin a few millimetres deep, tells you the wick is at its limit, not past it. So before any conclusion, run the pool-quality check on two unburned candles from the same pour, cured at least to the oil page's stated minimum (Cinnamon Vanilla's page states no cure in the text we captured; the 25 of 102 CSI oil pages that state one all say 48–72 hours for soy, and many makers judge at day 7 or later).

Note the asymmetry. If the pool is too deep, the flame tall and the glass sooty, you may have a big pool and a weak throw for the opposite reason: combustion products and a hot, flickering flame can mask the scent. That candle needs one step down, and the wick autopsy is the test.

What a bigger wick adds once the pool is full

Up to the point where the pool covers the jar at a sensible depth, more wick means more liquid surface and more scent released, which is why under-wicked candles respond so well to a step up. Past that point the surface can't grow: the glass stops it. What still grows is the heat. A bigger wick tends to make a taller flame, a deeper and hotter pool, more carbon on the wick, more soot on the glass and a hotter jar by the final third. A hotter pool may release scent a little faster, but in our judgement the gain is small next to the costs, and hot, deep pools can also burn through a candle faster.

So the question stops being "is there enough heat?" and becomes "why doesn't a full pool throw?". The usual answers are further down the ladder: judged too early, judged in the wrong room or with a tired nose, less oil in the jar than the batch sheet says, or an oil that performs modestly in this wax. Geometry is a separate branch: a full pool in a tall jar whose scent stays in the headspace is the vessel-swap post, and the post-extinguish bloom that shows a pool is loaded is 3213.

Big pool, weak throw: where the fault usually is

The table ranks the causes behind a full pool with a weak throw, most common first. It is editorial judgement; CSI has no failure statistics or measured throw data. The two right-hand columns say how you would see each one.

Causes can overlap, which is why the ladder stops at the first rung that explains the result. A day-three candle judged under a ceiling fan fails rungs 1 and 2 at once; fixing either might be enough.

The single wick-step futility A/B

The set: four 150 g candles from one pour, in the Clear Glass Jar with Golden Lid (150 gram), CSI 464 with Cinnamon Vanilla at 8% of total weight (12 g of oil + 138 g of wax each). A1 and A2 on your current wick, Eco Thin (C1) in the worked example; B1 and B2 on one step up, Eco Thick (C2). Pour at 80–85°C (CSI 464's stated pour is 80–90°C; the jar page says "Safe for hot pour up to 85°C", so the lower limit governs). Cure all four together to at least day 7.

Costs exclude labour, freight, packaging and GST. Starting from nothing, the outlay for the A/B and the load pair below is ₹2,088.60; if you own everything except C2, the new cash is ₹94.40.

Past the wick: cure, conditions, load, oil

Rung 1 · cure. If you judged in the first days, re-burn an unburned twin at day 7 and again at day 14. Cost: time. Past day 14 with a passing pool, cure is no longer the suspect; the stop-waiting decision covers when to move on.

Rung 2 · test conditions. A closed room of known size, fan and AC off, nothing else scented, a nose that walks in from outside once the pool is full. Cost: nothing. If the candle scores 2–3 under those conditions, the candle was never weak.

Rung 3 · the load actually in the jar. First the method: oil weighed in grams as a percentage of total candle weight (12 g in a 150 g candle at 8%), added at the wax page's temperature and stirred well. A cap, a ml measure or "80 g per kg of wax" puts less oil in the jar than the label says (basis maths: the load-basis hub). Then one step up, within the two ceilings: the lower of the oil page's and the wax page's stated maximum governs. Cinnamon Vanilla's page says up to 13%; CSI 464's says up to 10%; so 10% is the limit in this wax, and because the wax page doesn't say whether that is of total or of wax weight, the cautious top rung is 9% of total (9.89% of wax weight). Read on wax weight, 10% would be 9.09% of total; the oil page's own FAQ puts its 13% on "total wax weight", which would be 11.50% of total. At 9%, a 150 g candle takes 13.5 g of oil and 136.5 g of wax, ₹7.26 more oil per candle than at 8% at the 100 g price (₹6.83 at the 1 kg price).

The 100 g bottle covers both rounds with 25 g to spare; the 1 kg of wax leaves 175 g. If 9% scores clearly higher than 8% in both candles, the load was low for this oil; if not, more oil is not the answer either, and you have reached the last rung.

Rung 4 · the oil in this system. Pool passes, cured, judged fairly, load weighed and stepped: now the oil is a fair suspect. The weak-even-at-10% post gives it a verdict by testing the same oil in a second wax and as a flameless melt, so only the oil stays constant. Before you reject an oil outright, the before-you-reject checklist is worth one read.

For the A/B and the load rung

Four items: the wick you keep and the one step you test, the worked-example oil, the wax whose ceiling governs rung 3, and the scale that proves the grams. Chosen on page statements, per-gram and per-unit price and stock on 26 September 2026; CSI has no measured throw data, so nothing is ranked on throw. The oil table shows every size, 150 g candles at 12 g, and whether a size covers both rounds (75 g).

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