My 10 cm Double-Wick Candle Reaches a Full Melt Pool Within One Hour — Are Both Wicks Probably Too Large?

What "under an hour" means in a 10 cm jar

Start with the clock. The commonly cited rule of thumb is about one hour of burning per 2.5 cm of jar width, which is about 4.0 hours on the listed 10 cm and 3.7 hours on a 9.3 cm inside; a full pool within about 3–4 hours of a first burn is another common expectation. Neither is CSI data, and both are rough. A full pool at one hour is 27% of the 3.7-hour figure. For a single centred wick that would mean a pool front racing 4.65 cm out from the middle in an hour. With a pair, each wick sits only 2.33 cm from the glass along the wick line, so the pool reaches the glass there first, and "full pool" is decided at the two points at right angles, 5.20 cm from each wick.

That is why a pair can look fast without being wrong. Each wick serves 33.96 cm², the area of a single jar of 6.58 cm (D ÷ √2), and by the same rough rule that jar would expect about 2.6 hours, not 3.7. So a pair that reaches the glass in two and a half hours may be perfectly healthy. Under one hour is a different matter: faster than even the equivalent single jar would suggest, by a wide margin.

Before you pour anything, rule out the boring causes of speed: a first timing taken on a relight while the candle was still warm, a hot afternoon room, a fan, a shallow fill. The 45-minute post for 8 cm jars has the full confounder list and a 15-minute timeline. If you want to know whether each wick of the pair is too big on its own or the two are only too hot together, light one wick alone for an hour: that single-lit diagnostic is the 8.5 cm double-wick post. This page assumes the speed is real and asks what to step down to.

Three arms, and the question each one asks

"Both wicks too large" assumes the jar needs two. Often it does, and the hub, the 10–12 cm hub, starts from a single wick that overheats the centre. But a 500 g candle at 8% of a light oil in a jar 9.3 cm inside is close enough to the boundary that a well-chosen single can work, and if it does, it is simpler to make. So the step-down has three arms, not two.

Arm A is not wasted. Re-pouring your current pair alongside the others means all six candles share wax, oil, jar batch, pour and cure, so if the new A candles are not fast, the first candle was the outlier and you have saved yourself a change. Arm B is the obvious step: CSI's only sized rung below C2 is C1, so two C1 is the next pair down. If you are already on two C1, arm B does not exist at CSI, and the test becomes your pair against arm C. Arm C is chosen because the Cotton Braided Wicks Ready Made page describes "large-diameter candles exceeding 8 cm"; at 9.3 cm inside that is inside the range the page describes.

Running the step-down

The worked example pours the Apothecary 500 gm with CSI 464 and Orchard Pear at 8%: 500 g = 40 g of oil + 460 g of wax. The Orchard Pear page does not state a candle load in the text we captured, so the working limit is CSI 464's "up to 10%"; 8% is inside it. Two candles per arm is the minimum that shows an odd candle.

Per candle, with stickers: ₹619.28 on the C2 pair, ₹612.20 on the C1 pair and ₹609.90 on one Cotton Braided (₹149.60 of oil, ₹233.40 of wax, ₹212.40 of jar). Costs are worked examples and exclude labour, freight, packaging and GST. From nothing, the cash outlay is ₹5,217.00 including a pack of centering devices; if you already own the jars, wax, oil and your C2 pack, the new wicks are ₹238.00. The 260 g of oil left covers 6 more candles if an arm splits.

Reading the step-down

Thresholds are our judgement, built from commonly cited rules of thumb so they can be read with a clock, a ruler and a skewer. Keep them identical across all six candles. The band's lower edge is deliberately loose: a pair in a 10 cm jar has every right to beat the single-wick clock, as the equivalent-jar sum above shows. What it may not do is reach the glass in an hour and run deep and tall.

When both B and C land in band, the full life decides, and only then cost and appearance. Late in a wide jar, pairs commonly gain heat faster than singles; if the C1 pair is calm at the top but climbs near the bottom, the multi-wick life-cycle post sets out which lever to tune for which depth. If your result splits C1 from C2 the other way, too slow on C1 and too fast on C2, your answer sits between CSI's rungs and the gap post, the slightly-small, clearly-large post, lists the options.

What each answer costs per candle

One Cotton Braided costs ₹0.20 more per candle than a C1 pair, so on wicks alone the two winners are almost level. The real differences are labour (one wick to set instead of two, and one sticker: ₹5.00 for two), appearance (some buyers like two flames in a wide jar), and how each build behaves in the final third. Choose on full-life results first. A 500 g candle's material cost is dominated by the jar and the wax, so the step-down is a safety and quality decision that happens to save a little money, not the other way round.

What to buy, and what to skip

Five items, in the order the step-down needs them, chosen on page statements, price and stock on 29 September 2026. CSI publishes no wick-performance data, so nothing is ranked on burn results. Oil candles are counted at 40 g (500 g fill) and 12 g (150 g).

Frequently asked questions