I Have a Customer Complaint About a Candle Made Three Months Ago — How Can Batch Codes Help Me Identify Which Wax, Fragrance and Wick Were Used?

How a batch code turns a complaint into an investigation

A batch code is only a short string printed on the base or label of a candle. Its value comes from what it points to. On its own it tells you nothing; linked to your records it tells you which day the candle was poured, which production batch it came from, and through that batch sheet, which lots of wax, fragrance oil and wick went into it. If you kept retained samples, it also tells you which sealed bag and bottle on your shelf contain the same material.

Think of it as a chain with four links. If any link is missing, the chain breaks at that point and everything beyond it becomes guesswork.

Note what the code on the candle does not need to carry. It does not need the wax lot, the oil lot or the wick size. Those belong on the batch sheet. The candle code only has to identify one batch uniquely; the sheet does the rest. Keeping the printed code short is what makes it practical to apply to every candle.

Working the complaint step by step

Suppose a customer writes to say that a Lavender candle bought about three months ago barely scents the room. Here is how the chain is used.

The sideways look is often the most revealing step. If 47 other candles from the same batch sold without a word and the retained candle throws normally, the problem is most likely with that single candle or how it was used. If the retained candle is also weak, the whole batch is suspect and you have a production issue to solve.

Whatever you conclude, write it down against the code: the complaint, what you checked, what you found and what you told the customer. A simple complaint log keyed to batch codes shows patterns that single cases hide, such as two complaints from different customers pointing at the same batch week.

Matching the complaint to the right records

Different complaints point to different parts of the chain. Going straight to the most likely record saves time and stops you chasing the wrong material.

Age matters here too. A candle made three months ago has spent those months somewhere, and a warm shelf or a sunny windowsill can change how it looks and smells. That is exactly why the retained finished candle is so useful: it has aged for the same three months, but in your known conditions. If your retained candle is fine and the customer's is not, storage or use becomes a more likely explanation than the batch itself.

Treat this routing as a first move rather than a verdict. Many faults have more than one cause, and the one-variable test that isolates wax, oil and wick is still the final word when the records alone do not settle it.

Tracing forwards and backwards

Traceability works in two directions, and the second is the one that protects your other customers. Forward tracing starts at a candle and ends at its materials, which is what the complaint needs. Backward tracing starts at a material lot and finds every batch that used it.

If your investigation shows that a particular oil lot is at fault, the next question is urgent: which other batches used that lot, and where are those candles now? If every batch sheet records the lot, a search of your sheets answers it in minutes. Any unsold stock from those batches can be held and checked before it ships. Without lot references on the sheets, you cannot scope the problem and are left choosing between ignoring it and withdrawing everything.

When a raw material is implicated, contact the supplier with specifics. For CSI materials, message CSI on WhatsApp (+91 7397976926) with the product name, pack size, purchase date and whatever lot or batch marking was on the pack, describe what you found, and ask what batch details they can share. Do not assume how any supplier records its lots; ask, and keep the answer with your records.

If the candle has no code, and designing one that works

If you did not code candles three months ago, you can still narrow things down. Use the order date and dispatch record to set a window, then list every batch of that fragrance poured before dispatch. If only one or two batches fit, you are nearly as well placed as with a code. If ten fit, the investigation becomes a sampling exercise across all of them, which is slow and rarely conclusive.

The lesson is to start coding now. A workable code needs three parts: a short fragrance code, the pour date, and the batch number within that day. It must be unique, legible and applied to every candle before it leaves the pouring area. The format below is one suggestion; adapt it to your own labels.

A code like LAV-DDMMYY-02 on a small base sticker costs almost nothing per candle. Write the same code at the top of the batch sheet and on the retained finished candle from that batch. The day a complaint arrives, those three matching codes are what turn an uncomfortable conversation into a clear answer.

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