My First 20 Candles Pour Perfectly but the Wax Becomes Too Thick Before I Finish the Remaining 80 — How Do I Maintain a Consistent Pouring Temperature?

Why it works for twenty and fails for eighty

Every vessel you pour from starts losing heat the moment it leaves the heat source. In a small batch, you finish before that matters. In a 100-candle session, the same vessel is asked to stay pourable for far longer than it can, and somewhere around the twentieth jar the wax has thickened enough that it no longer flows, levels and sets the way it did at the start.

That candle number is useful. It is effectively your pour window measured in jars: how many candles one load of wax can fill before it leaves the range your wax needs. The goal is not to stretch that window with more heat. It is to make sure no single load ever has to last longer than the window.

Some waxes give you very little room. CSI 468 coconut soy states a pour temperature of 58–60°C, a band only two degrees wide. A large jug of that wax cannot stay inside such a band for 100 pours. A small pitcher refilled often can.

The 100-candle batch in numbers

One hundred candles at 200 g each need 20 kg of scented wax. At 8% of total weight, that is 18.4 kg of wax and 1.6 kg of fragrance oil. With the 5% planning wastage, allow a little more wax than the paper figure so the last jars are not starved.

Now look at the pitcher. The CSI Steel Pouring Pitcher (Large) holds 600 ml. Melted soy wax is roughly 0.9 g per ml, so a completely full pitcher carries around 540 g, a little over two and a half candles. Nobody should carry a brim-full pitcher of hot wax, and pouring half a candle from the tail end of a cooling draw is exactly what you are trying to avoid. So plan for two candles per draw, which is about 400 g, or roughly 440 ml of melted wax. That is a suggested starting point, not a rule.

At two candles per draw, 100 candles take 50 draws. That sounds slow. In practice each draw is a short walk and two pours, and every candle is poured from wax that left the heat seconds earlier.

The draw-and-pour method, step by step

Two people, one reservoir

If you have a helper, split the work by role rather than by pot. One person draws, checks the thermometer and pours; the other moves filled jars away and places empty ones within reach. The pourer never waits for a free space on the bench, so the pitcher is empty within moments of leaving the melter. This halves the time each draw spends in the air without adding any equipment, and it is usually the cheapest improvement available to a small workshop pushing from 20 to 100 candles a session.

When one melter is not enough for the batch

A 20 kg scented batch does not fit the 10 kg CSI melter (₹21,240.00). Its product page states it melts 9.5 litres at a time, which at roughly 0.9 g per ml is about 8.55 kg of liquid wax. The 20 kg capacity is ₹25,960.00; the product page does not break out a separate litre figure for it, so measure your own fill level before relying on a single 20 kg pot.

The alternative is a staggered pair: start a second pot while the first is being poured, so the second reaches holding temperature as the first runs low. Each pot is then a separate scented batch, weighed on its own sheet. That is a structure decision rather than a heat decision; the draw-and-pour method stays the same in both pots.

What you should not do is keep one unheated jug going by putting it back on a hob every time it thickens. That turns a temperature problem into a fragrance-exposure problem, because scented wax is being heated over and over.

Keep the draw-and-pour readings on the batch sheet alongside the candle numbers. After a few sessions they show you the real holding temperature that keeps your pitcher draws in range, which becomes the number on your process card instead of a guess.

Heat safety and the decision

It is tempting to fix cooling by turning the dial to 100°C. Do not do this with scented wax. Some CSI fragrance oils have published flashpoints below that setting: Roasted Coconut at 93°C and Gardenia at 98°C. Holding scented wax at the melter's maximum is a safety risk and needlessly hard on the fragrance. Check the flashpoint of every oil you pour and keep the holding temperature comfortably below it.

Electrical load matters too once you run a melter all afternoon. Plug a production melter into a socket that is rated for it, not an extension board shared with a heat gun and a kettle.

The decision is simple: keep one heated reservoir, send small checked loads, and do not buy more heat to fix a handling problem. Only when your log shows the bulk itself cannot hold temperature for the session length is a second melter worth pricing.

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