I Need to Pour 100 Candles but Cannot Finish Before the Wax Cools — Should I Work in Smaller Batches Instead of Repeatedly Reheating One Large Batch?

Why smaller scented batches usually beat reheating

When a 100-candle run cools before you finish, there are two broad ways out. You can keep one fully scented pot and bring it back to temperature whenever it thickens. Or you can hold the wax warm without fragrance and scent it in portions that are poured completely before they cool.

Both produce candles. They do not produce the same candles. In the reheated pot, the oil goes through every heating and every minute of holding, and the last candles carry the most of it. In the sub-batch approach, every portion is scented once, poured once, and has roughly the same short heat history as every other portion.

The cost of sub-batching is administrative, not chemical. You weigh more often. You write more lines. You label more carefully. For a run where consistency matters, that is a reasonable trade.

There is one case where splitting is pointless: if your pour window is already larger than the whole run. If you can pour all 100 candles in range, one scented batch is simpler and perfectly sound. The problem you are describing tells us you are not in that case.

Measure your pour window first

Most makers pick a sub-batch size by what feels manageable. That is how people end up with portions that still cool out before the end, or so small that the weighing becomes the slowest part of the day. Measure once instead.

Suppose your trial shows 22 candles in range before the first low reading. A sub-batch of 20 candles gives you a margin of two, and 100 divides into it neatly.

The window belongs to the product, not to you

A pour window is specific to one combination of wax, jar size, room and team. A narrow jar fills faster than a wide one, so more candles fit in the same minutes. A wax with a tight stated pour band, like CSI 468, leaves less room than one with a broader band. A cool, breezy room in the monsoon shortens the window compared with a still room in summer. Two people pouring widen it; one person working alone narrows it.

So record the window against the product on its specification sheet, with the date and conditions, and re-measure when any of those change. It takes one trial portion. Carrying a window measured for a 200 g tumbler over to a 400 g wide jar is how a well-planned day goes wrong by the third sub-batch.

The 100-candle run as five sub-batches

One hundred candles at 200 g is 20 kg of scented wax. At 8% on total weight, the whole run is 18.4 kg of wax and 1.6 kg of oil. Split into five sub-batches of 20 candles, each is 4 kg scented: 3.68 kg of wax and 0.32 kg of oil. Check the working: 3.68 + 0.32 = 4.00 kg, and 0.32 ÷ 4.00 = 8%. Five of them return 18.4 kg and 1.6 kg.

Do not shortcut this by weighing 4 kg of wax and adding 320 g of oil. That produces 4.32 kg at about 7.4%, and every sub-batch will be slightly under-scented relative to your approved candle.

Allow for the 5% planning wastage on the run as a whole. On paper, five sub-batches fill exactly 100 candles; in practice, wax clings to pitchers and vessels, so melt a little more unscented base than 18.4 kg and plan for a possible sixth, smaller sub-batch to finish the last jars.

Running the day without losing time

The worry with sub-batches is that production stops while you weigh. It does not have to, if the weighing is done before it is needed.

Pre-weigh all five oil portions before melting starts. Five labelled, lidded containers of 0.32 kg each, marked A to E, sit on a shelf away from the heat. Now scenting a sub-batch takes a single pour of a ready container rather than a weighing session in the middle of pouring.

Hold the base unscented and warm. The CSI Electric Wax Melter (10 kg, ₹21,240.00) states it melts 9.5 litres at a time, roughly 8.55 kg of liquid wax at about 0.9 g per ml, so it can hold two sub-batches' worth of base comfortably. Refill it with fresh wax as you draw, so there is always melted base ready. Unscented wax can be held and reheated without the fragrance question arising at all.

Scent each portion in a clean, heat-safe vessel of your own, set on the scale. Draw 3.68 kg of base into it, add the pre-weighed 0.32 kg of oil at the wax maker's stated addition temperature, and stir thoroughly. For Eco Soy CSI 400 the stated addition is 80–90°C with 2 minutes of stirring. For waxes with no stated figure, set your own through a trial and record it as a starting point you have validated.

Overlap the steps. While sub-batch A is being poured, sub-batch B's base is already coming to the addition temperature. Two people make this smooth: one scents and pours, the other clears filled jars and draws the next base.

Coding and retaining by sub-batch

Write the sub-batch letter on the base of every candle alongside the run code, so candle 57 reads as sub-batch C without anyone checking a sheet. If a customer later reports a weaker candle, you can go straight to the line for that portion: its weights, its oil lot, its addition reading. Without the letter, all five portions become one run, and a single mistake in one of them puts all 100 candles under suspicion.

The decision

If you cannot pour 100 candles before the wax cools, do not keep reheating one scented pot. Measure your pour window, size sub-batches just below it, weigh every portion on total weight, and keep the base unscented until its turn.

You do not need a second large melter for this. One heated base and a clean mixing vessel are enough. Only if your log shows the base itself cannot keep up with the day's draws is extra melting capacity the next thing to consider.

Where this page fits

CSI already has guides that cover parts of this question. This page takes the production-floor angle; these go deeper on the rest:

Three things to buy for this job

Frequently asked questions