I Ordered 5 Kg of Fragrance Oil but Received Several Smaller Containers — Should I Compare Them Before Combining Everything Into One Production Container?

Why screen before you combine

CSI lists its fragrance oils in packs up to 1 kg, so a 5 kg order naturally arrives as several containers. The same is true of many suppliers, and the reader in this situation usually wants one production container so weighing is simpler. That is a reasonable goal. The question is only one of order: check, then combine.

Most of the time the containers will match. Occasionally one will not, perhaps because it came from different stock, sat somewhere warmer, or has a seal that failed on the way. Once it has been tipped into a common drum, that difference is spread across all 5 kg and there is no way to separate it again. A short screen per container is cheap insurance against an expensive, unexplained change in finished candles.

Be clear about what you are and are not checking. CSI product pages do not publish lot numbers, certificates of analysis, viscosity or colour specifications, so you cannot compare containers against a published figure. You are comparing them against each other and against your reference, which is exactly what a small workshop can do well.

The per-container screen

The example row C4 shows how the sheet earns its keep. A slightly darker container that smells the same is not necessarily faulty, but it is the one to keep apart until a comparison candle confirms it behaves like the others. The other four can proceed.

Worked example: 5 kg of Bergamot Amber

A maker orders 5 kg of Bergamot Amber for a festive run. At ₹5,437.00 per kilogram, five 1 kg packs cost 5 × ₹5,437.00 = ₹27,185.00. For comparison, the same weight as ten 500 g packs would be 10 × ₹2,718.00 = ₹27,180.00, which is ₹27,185.00 − ₹27,180.00 = ₹5.00 less but doubles the number of containers to screen. Either way, the oil costs ₹5,437.00 ÷ 1,000 = ₹5.437 per gram in the 1 kg packs.

At 8% of a 200 g candle, each jar takes 16 g, so 5 kg fills 5,000 ÷ 16 = 312 candles, rounding down, and the oil in each costs 16 × ₹5.437 = ₹86.99. One odd container is 1,000 ÷ 16 = 62 of those candles. If you retain 10 g from each container while the screen is open, a suggested starting point, that is 50 g in total, worth 50 × ₹5.437 = ₹271.85. Set that against the value of 62 candles that might otherwise carry an unexplained difference.

The product page for this oil describes a clear shift in character with load: bergamot leads at 6%, the blend is balanced at 8%, and amber and the vanilla and musk base come forward at 10%. That is useful context for screening. A container that seems slightly stronger or weaker on a strip could translate into a noticeable change in balance in the candle, so an odd strip result is worth a comparison candle rather than a shrug.

What the screen will not catch

A strip and a glass of oil cannot tell you everything. Two containers can look and smell alike on a strip yet behave slightly differently in wax, for example in how well they bind or how they throw when hot. The screen is designed to catch the obvious odd one out cheaply, not to replace a candle test. If this oil is new to you, or the last batch you used was some time ago, one confirmation candle from the passed stock is still a sensible step before a festive run of this size.

Screening is also only as good as your nose on the day. Work in a room free of other open fragrances, take a short break of fresh air between rounds, and if possible ask a second person to sort the coded strips independently. Where two people disagree about a container, treat it as a hold rather than averaging the opinions.

Combine or use in sequence

Once all containers pass, you have a genuine choice, and neither option is always right.

For many small businesses, sequential use is the simpler choice: unopened containers stay sealed and protected, and if a complaint arrives you can say which container the candle came from. Combining makes sense when you want a single uniform oil across a large run and you have a clean, dry, suitable vessel with a good seal. If you combine, label the vessel with every container number that went into it, and keep a retained sample of the combined oil.

Whichever route you choose, write it down before the first candle is poured. A batch sheet that says Bergamot Amber, 8% is incomplete for a split pack. Bergamot Amber, 8%, container C2, or Bergamot Amber, 8%, combined vessel V1 from C1, C2, C3 and C5 is what lets you trace a complaint back to a specific kilogram months later.

Store the unopened containers together, upright, in the same cool, shaded place, and keep them in number order so the sequence is obvious to anyone else who works the shift. If a container is opened and only partly used, note the date opened on its label. Partly used containers carry more headspace, and it is sensible to finish those before opening the next.

When one container is different

Keep it separate, move it to a quarantine shelf with a clear label, and do not let it anywhere near the combined stock. Make one comparison candle from it and one from a passed container, same jar, same wick, same load, same cure, burned side by side. If the difference shows in wax, send photographs, your screen sheet and the candle notes to the supplier; for CSI, that goes on WhatsApp to +91 7397976926. Record their reply.

Resist the temptation to blend the odd container in at a small ratio to use it up. That is exactly how a difference gets hidden rather than resolved, and it applies whoever supplied the oil, including us. A container that fails a fair comparison is a conversation, not an ingredient.

Where this page fits

CSI already has guides that cover parts of this question. This page covers the goods-in check for the question above; these go deeper on the rest:

Three things to buy for this job

Frequently asked questions