Should I Compare Fragrance Oil Samples After Storage Rather Than Choosing a Supplier Based Only on How Fresh Samples Smell?

Why fresh samples mislead

When a sample arrives, you open the bottle, dip a strip and react to the first few minutes. Those minutes are dominated by the lighter, more volatile materials in the blend — the sparkling citrus, the fresh green, the first burst of spice. As general fragrance practice, those are also among the materials most likely to fade or change during storage, while heavier woods, musks and resins persist.

So the oil that impresses most on the day it arrives is not necessarily the one that will still impress in month three. Choosing a supplier on fresh samples rewards a bright opening. Choosing on aged samples rewards an oil that holds together — which is what your customers actually experience.

This matters most when your stock moves slowly, when you make festive candles months ahead, or when you plan to buy oil in quantities that take a season to use. It matters least for a fast seller poured and sold within a few weeks — but even then, the oil in your storeroom ages between deliveries, so a short hold is still worth checking before you commit to a new supplier for the long term.

Designing a fair comparison

Say you are choosing an oud for a premium line and have three candidates: two from other suppliers (call them A and B) and CSI's Woody Oud. Fairness comes from treating them identically in every respect except the oil.

At 16 g per candle, each CSI candle uses 16 g × ₹4.5312 = ₹72.50 of oil, and the six candles from the sample use 6 × 16 g = 96 g of it. Your other candidates will have their own prices; the method stays the same.

Three comparisons, three different questions

At day 90 you have, for each supplier, three day-0 candles that have aged on the shelf, three fresh candles poured from oil that aged in the bottle, and a few grams of stored oil for strips. Each pairing answers something different.

Aged candle versus fresh candle from stored oil

This shows how the oil behaves once it is in wax and sitting on a shelf — the customer's experience. A large gap suggests the fragrance balance shifts in the candle over the hold.

Fresh candle from stored oil versus your day-0 notes

This shows whether the oil changed in the bottle. If candles poured on day 90 smell different from candles poured on day 0 when both were fresh, the oil itself drifted in storage — an important point if you plan to hold kilograms.

Strips: stored oil versus retained reference

A quick check on colour, clarity and odour of the oil itself, ideally against a sealed retained sample. Look for darkening, haze, layers or sediment as well as smell; any of these in one candidate and not the others is worth a question to that supplier before you go further.

The fresh-versus-aged supplier scorecard

Notice that the documents rows belong in the same table. A supplier who cannot tell you how to store their oil, or will not put it in writing, has given you useful information about the risk of holding their stock.

Deciding, and what to buy afterwards

Choose the candidate whose aged candles stay closest to their own fresh result and whose stored oil still matches its reference, provided its fresh character fits your brief. If that is not CSI's oil, choose the other one; a supplier you trust to be honest about this is worth more than one more sale.

When two candidates finish close

It often happens that two oils both hold well and differ only in small ways. Then other factors can decide: the fresh character that best fits your brand, the per-gram price at the pack size you will really buy, how clearly each supplier answered your storage and document questions, and whether the oil's stated load range and flashpoint suit your process. Write the reasons down. When a customer or a stockist asks why you chose that oil, “it held best over 90 days in our storeroom” is a much better answer than “it smelled nicest on the strip”.

If the results are close but your assessors disagree, extend the hold rather than forcing a choice. Another 90 days costs little and will usually separate them.

Then size the first order to what the test supports. Ninety days of evidence supports holding roughly ninety days of oil, not a year's worth. Keep a candle from the test as a retained sample, extend the hold to 180 days if your stock sits longer, and repeat the comparison whenever a supplier sends a new lot. Never promise customers that the fragrance will not change; promise only what your aged candles have shown.

Where this page fits

CSI already has guides that cover parts of this question. This page answers one fragrance-ageing decision; these cover the neighbouring questions:

Three things to buy for this decision

Frequently asked questions