I'm Producing 500 Identical Candles Across Several Days — How Do I Make Day-One and Day-Three Batches Smell, Look and Burn the Same?

What actually changes between day one and day three

A single-day run has one set of conditions. A three-day run has three, plus two nights in between. When day-three candles look or smell different from day-one candles, makers usually suspect the fragrance oil. More often, something quieter changed: a new carton of wax was opened, the workshop was warmer, a different person poured, yesterday's leftover pot went into today's melt, or day-one candles simply had two more days to cure when they were compared.

Before day one: reserve and calculate

Start with the quantities. Five hundred candles at 200 g and 8% fragrance load, calculated on total weight, is 100 kg of scented wax: 92 kg wax + 8 kg oil. With 5% planning wastage for spills, rejects and the wax left in jugs, plan roughly 105 kg: about 96.6 kg wax + 8.4 kg oil.

Now reserve it. Everything for all three days should be on your shelf before the first melt, not ordered as you go. That is the single biggest control you have. CSI's largest listed packs are 10 kg for most waxes and 50 kg for Natural Soy Pearl Wax; larger quantities are quoted on WhatsApp at +91 7397976926. When you order, ask about lot numbers and record them on arrival, so if day three uses a different lot you know it rather than discover it.

Spread over three days, the run is about 35 kg of scented wax a day. In the 10 kg melter that is three full 10 kg batches (9.2 kg wax + 0.8 kg oil each) and one 5 kg batch (4.6 kg wax + 0.4 kg oil). Keeping the same batch pattern every day matters: a day made of three large batches is not the same process as a day made of seven small ones.

Each morning: restart the same way

End each day with a short handover note on the last batch sheet: which wax carton and oil container are open, how much of each remains, any rejects and their reasons, and anything that felt different. The person who starts day two, even if it is you, reads it before switching the melter on. Most overnight surprises are things someone noticed and did not write down.

Compare by cure age, not by calendar

This is the variable most often misread. On the morning of day four, day-one candles have cured for three days and day-three candles for one. Burn one of each and they will differ, because fragrance performance in soy wax develops with cure. That difference says nothing about your production consistency; it is simply age.

So compare like with like. Decide your cure period as a starting point to validate, and test each day's candles only when they reach it. Release them for packing on the same rule. The practical consequence is that packing runs in the same order as pouring: day-one candles are packed first, day-three candles last, each after the same cure period.

Label the curing shelves by pour day as well as batch code, so nobody packs day-three candles early simply because they happen to be nearest the packing table. If a customer deadline forces you to pack some candles before others have finished curing, record that on the packing sheet; it explains later differences that would otherwise look like a production fault.

Day one sets the standard

Keep a small number of day-one candles back as reference candles, labelled with batch, date and lot numbers, and stored with lids on. They are the physical standard every later batch is compared against: same cure age, side by side, blind where possible.

Check four things. Appearance: colour, tops, adhesion to the glass and wick position. Cold throw with lids off. Fill weight, which you can weigh directly against the day-one record. And a burn test in the same room, one candle at a time, for hot throw and melt pool. If day-three candles match the reference on all four, the run is consistent and your batch sheets prove it. If one differs, the overnight variables table tells you where to look first.

Keep the reference candles after the order ships. If a customer reorders months later, or reports a problem, you have the original to compare against.

When three days should be two

A last point that runs against selling you more wax or a second melter. If your team struggles to keep conditions steady across three days, the answer may be fewer, longer production days rather than more equipment. Every overnight break is a chance for something to change. Before you buy anything, check whether the run could be compressed with better scheduling: weighing oils for the next day at the end of the current one, pre-wicking all jars before day one, and keeping the cooling layout set up so nothing is moved overnight.

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