I Want to Compare 20 Candle Fragrance Oils Objectively — How Do I Create Identical Test Candles so Wax Quantity, Fragrance Load, Wick, Jar and Cure Time Remain Controlled?

The control table

Most fragrance comparisons fail before the first candle is lit. One oil was poured on Monday and another on Thursday. Three jars came from a different delivery. The wick box ran out halfway and a new one was opened. The last five candles were mixed from the bottom of the wax pot after it had been held hot for an hour. Each difference is small, and each one can change throw more than the difference between two good oils. The table lists every variable a small workshop can control, the setting to use, and what to record.

Two rows cause more trouble than all the others. The load convention: CSI's maths, and this page's, sets load as a share of the finished candle. Adding 16 g of oil to 200 g of wax gives a 216 g candle at 7.41%, not 8%. If half your candles are made one way and half the other, you have built a load test by accident. I'm Making a 1 Kg Soy Wax Batch at 8% Fragrance Load — Do I Add 80 g Fragrance Oil to 1 Kg Wax or Should the 8% be Calculated from the Total Finished Candle Weight? covers the two conventions. And cure age: two oils tested a week apart in cure are not comparable, which is why the whole set is poured on one day. I'm Comparing Two Fragrance Oils — Should I Burn-Test Them at Exactly the Same Cure Age to Make the Comparison Fair? explains why.

Load: where small errors hide

Twenty separate 16 g weighings is where a controlled test quietly stops being controlled. The candle is small, so a gram matters. The table shows what a weighing error on the oil does to the true load of a 200 g candle aiming at 8%.

A one-gram slip changes the load by nearly half a percentage point. That is about the same size as the load differences makers test deliberately, so it can easily rank one oil above another. Three habits prevent it. Weigh the oil directly into the vessel the wax will go into, rather than into a cup you then pour from — oil clings to the cup. Zero the scale with the vessel on it every time. And write the actual weight, not the target, on the batch sheet. If a jar comes out at 17.2 g, either correct it or note it and discount that candle's score. CSI's weighing scale is ₹354.00; check its resolution on the product page, since a scale that reads only in whole grams cannot hold ±0.5 g.

Build day, step by step

The priced build

Here is the full order for twenty oils plus a control, using real CSI pack sizes. Wax is one 5 kg bag of Luxury Soy Wax Chunks (rated up to 13%, the wax maker's stated maximum; we test at 8%). Wicks are Eco Candle Wicks Thin C1 in a 50-pack, jars are White Matte Glass Jars in packs of five, and there is one wick centering device per jar so all twenty-one can set at once.

Each 50 g bottle leaves 34 g after the first candle, which is enough for a second 200 g candle and a cold-throw pot. That is the argument for replicates: a second candle per oil costs only wax, jar, wick and centering device. Building forty candles plus two controls — a 10 kg bag of Chunks at ₹5,999.00, nine packs of jars and nine of centering devices — costs ₹17,671.53 in total, ₹4,892.00 more than the single build. With two candles per oil, a result that appears in both is the oil; a result in only one is the candle.

The 15 g variant

A 15 g sample cannot make a 200 g candle at 8%. It can make a smaller one. If every test candle is 150 g — 12 g oil and 138 g wax, still 8% of finished weight — a 15 g sample covers it with 3 g to spare. The candles stay identical to each other, which is what matters for a comparison, though a 150 g fill in a 200 g jar burns lower in the glass than your product will. Of the twenty oils here, 14 have a 15 g in stock; the other 6 (Mahogany Teakwood (BBW Inspired), Love Spell, Coffee Vanilla Tobacco, Forever Red (BBW Inspired), Pink Crush, Wild Berries) start at 50 g.

The 15 g route saves ₹2,782.45 on oil and a little wax (2,910 g instead of 3,880 g), but it gives up the replicate — there is no second candle in a 15 g — and it tests a candle that is not quite your product. It suits a first screen of twenty oils. For the round that chooses what you launch, use the 50 g and your production fill. I Have 30 Fragrance Samples but Only Want to Launch Five Candles — What Testing Sequence Can Eliminate Poor Performers Before I Waste Wax and Wicks on Full Burn Tests? shows how to put a cheaper screen in front of the full build.

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