I Tested a 100 g Fragrance Sample Successfully and Then Purchased 5 Kg — Should I Revalidate the Bulk Material Before Making Customer Inventory?

What the sample did and did not prove

A 100 g sample is the right way to choose a fragrance. It lets you smell it, pour a few candles and decide whether it belongs in your range, without buying kilograms of something you may not like. But look at what 100 g can actually support. At 8% of total candle weight, a 200 g candle holds 16 g of oil, so 100 g covers about six candles. Most makers use some of that for smelling strips and a first trial, so the real evidence behind the approval is often three or four candles.

The 5 kg you then bought supports about 312 candles at the same load. With a 5% planning wastage allowance, that is roughly 296 sellable candles. Those candles are customer inventory: they will be sold, reviewed and, if you are lucky, reordered. The evidence standard should rise with the quantity.

There are two gaps between the sample and the bulk. The first is material: the bulk may come from a different production lot from the sample, or have been stored differently since. The second is process: your sample test may have been poured in a small pot, in a jar you do not use in production, with a wick chosen on the day. Revalidation checks both.

The cost argument for checking

Using Lavender as the example, the 100 g size is ₹540.00 and the 1 kg size ₹5,221.00. Five 1 kg bottles cost 5 × ₹5,221.00 = ₹26,105.00. For comparison, buying the same 5 kg as 100 g packs would cost fifty times ₹540.00, which works out to ₹5,400.00 per kg equivalent, so the bulk purchase was the sensible move once the fragrance was chosen.

Revalidation typically consumes 80 g to 160 g of the bulk oil, depending on whether you make one comparison batch or two. That is a small fraction of the ₹26,105.00 already spent, and it protects not just the oil but the wax, wicks, jars, labour and packaging that go into roughly 300 candles.

Bench checks on arrival

These take a few minutes and should happen the day the bulk arrives, before the bottles go onto the storage shelf.

Store the bulk while it waits

The bulk will sit on your shelf for days or weeks while the comparison candles cure, so treat that waiting period as part of the validation. Keep the bottles tightly closed, upright, in a cool, dry, dark place away from the melting area and any heat source. Fragrance oils are flammable liquids, so keep them away from open flames and hot plates, and never store them on top of a warm melter.

Open only one bottle for the comparison and pilot, and draw from it with a clean, dry pourer or beaker. Repeatedly opening all five bottles exposes each one to air and gives you five slightly different histories instead of one. Mark the opened bottle with the date it was first opened.

Comparison batch, then a held pilot

Comparison batch

If you still have sample oil, make two small batches on the same day, one with sample oil and one with bulk oil, using exactly the production wax, wick, jar and fill weight you intend to sell. A 500 g batch at 8% is 460 g wax and 40 g oil, which gives two 200 g candles plus a little spare. Cure them together and compare cold throw, hot throw, colour and burn.

If no sample oil remains, make one small batch with bulk oil in production conditions and compare it against your sample-made candle. This is weaker evidence because the two candles were made on different days, so the pilot step becomes more important.

Held pilot batch

Next, make one normal production batch with the bulk oil and hold it. For example, a 10 kg scented batch at 8% is 9.2 kg wax and 0.8 kg oil, and it fills 50 candles of 200 g, or 48 after 5% wastage. That uses 800 g of the 5 kg. Label these candles as pilot stock, cure them, burn-test at least two, and release them only if they pass.

The pilot checks what the sample test never could: how the oil behaves when stirred into a large mass of wax at production temperatures, how it pours across a longer session, and whether 50 candles are consistent from first to last. If you use an Electric Wax Melter for this batch, remember its display carries a stated ±10°C deviation, so verify the wax temperature with a separate thermometer, and add fragrance at the wax maker's stated temperature rather than at the melter's maximum.

Releasing the rest of the 5 kg

Once the pilot passes, release the remaining oil for customer inventory and record that decision with the date and who made it. After the pilot's 800 g and a comparison batch of 40 g to 80 g, a little over 4.1 kg remains. At 16 g per candle that supports roughly 255 further candles, so plan batches around that figure rather than the full 312.

If the pilot fails, stop. Keep the pilot candles, label the remaining oil as on hold, and look first at your process, because the comparison batch may already have shown the oil is fine. If the comparison batch showed a difference too, message CSI on WhatsApp (+91 7397976926) with the fragrance name, pack size, order details and your findings, and ask what batch information they can share. Record only what they confirm.

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