I'm Comparing Two Fragrance Oils — Should I Burn-Test Them at Exactly the Same Cure Age to Make the Comparison Fair?
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What if my two oils arrive on different days? Wait and pour both on the same day. If you cannot, stagger the burns so each candle is tested at the same age, and accept that the burn days, and the room conditions on them, will differ. Same-day pours are better.
At what age should I compare them? At two ages, not one, such as 7 days and 14 days as working checkpoints. Oils can cure at different rates, and a ranking at 7 days can flip by 14. Test at the age your customer will first burn the candle, too.
Why does it matter so much? Because the answer costs money. Moca Coffee costs ₹179.20 of oil per 200 g candle at 100 g and Roasted Coffee ₹62.40. Over 200 candles that gap is ₹23,360.00, so an unfair test can make a very expensive decision for you.
Why age decides unfair tests
The mechanism is covered in why curing affects fragrance performance. Soy wax keeps crystallising after it looks set, and the way it holds and releases fragrance changes as it does. Most of that change is commonly described as happening early. That makes cure age one of the largest variables in any burn test, often larger than the difference between two good oils. If one candle is older, the test has two variables, oil and age, and you cannot separate them afterwards.
It gets worse, because oils may not cure at the same rate. Do all fragrances need the same cure explains why a scent can reach its best sooner or later than another in the same wax. So even a matched-age comparison at a single age can mislead. An oil that is quick to peak wins at 7 days, while an oil that is slow to open up wins at 14. The table below shows how that plays out, using invented scores for two unnamed oils.
| Comparison | Oil X | Oil Y | Apparent winner | Fair? |
|---|---|---|---|---|
| X at 14 d vs Y at 7 d | 6.5 | 4 | X by 2.5 | No — X had a week more cure |
| X at 7 d vs Y at 14 d | 6 | 7 | Y by 1 | No — Y had a week more cure |
| Both at 7 d | 6 | 4 | X by 2 | Yes, at 7 days |
| Both at 14 d | 6.5 | 7 | Y by 0.5 | Yes, at 14 days |
| Your customer's first burn age | ? | ? | The one that matters | Test at that age |
The same two oils can "win" by 2.5 points or "lose" by 1 depending only on which candle was older. Matched at 7 days, X is clearly ahead. Matched at 14 days, the two are close, with Y slightly ahead. Neither matched result is wrong. They answer different questions. The one you need is the one at the age your customers will actually light the candle, and that is why the comparison runs at two ages.
Six ways a comparison goes unfair
Cure age is the largest trap, but it is not the only one. Each item below adds a second variable to what should be a one-variable test. Most cost nothing to fix once you know about them.
| Unfair element | Which candle it favours | Control |
|---|---|---|
| Different cure ages | Usually the older one | Pour the same day; burn at matched ages |
| Different burn days | Whichever day has the better room conditions | Burn pairs on the same day |
| Smelled first | Usually the first one smelled, before your nose adapts | Alternate the order; air the room; rest your nose |
| Known labels | The one you expect to win | Blind codes applied by someone else |
| Different load or weight | The one with more oil | Weigh oil for each candle; check the finished weights |
| Different wick, jar or melt pool | The one with the fuller melt pool | Same wick and jar; record the melt pool on every burn |
The last row catches many comparisons between oils of different character. A heavier oil can change how a wick behaves, so two candles with the same wick may not reach the same melt pool. Record the melt pool at the end of each burn. If one candle never reaches the glass, the comparison is partly a wick test. Load versus wick size explains what to do about it. For scoring, comparing loads objectively and an objective hot-throw method have sheets you can reuse.
The paired-age test
When the oils arrive on different days
Samples rarely arrive together. The simplest fix is also the best: hold the first oil until the second arrives, then pour both on the same day. You lose a few days and gain a clean comparison. If you cannot wait, perhaps because the first oil is already poured, stagger the burns so both candles are tested at the same age. That removes the age difference but brings in a burn-day difference. Different days can mean different weather, humidity, fan use and your own state. Keep the room routine identical and treat small differences with caution.
| Approach | Pour dates | 7-day burns | 14-day burns | Verdict quality |
|---|---|---|---|---|
| Hold A and pour together (best) | Both 1 Oct | Both 8 Oct | Both 15 Oct | Clean: same age, same burn day |
| Stagger the burns | A 28 Sep, B 1 Oct | A 5 Oct, B 8 Oct | A 12 Oct, B 15 Oct | Age matched; burn day not matched |
| Burn together regardless | A 28 Sep, B 1 Oct | Both 8 Oct (A at 10 d, B at 7 d) | Both 15 Oct (A at 17 d, B at 14 d) | Unfair: A always 3 days older |
If you choose to stagger, add a check. Re-pour oil A on the day oil B arrives, as a third set, and compare it with the original A at matched ages. If the two sets of A agree, your burn-day conditions are stable enough to trust the staggered comparison. If they do not, go back to same-day pours. Identical test candles for 20 oils scales this discipline up to a full range screen.
What the verdict is worth
It is easy to treat a burn test as a matter of taste. It is really a purchasing decision. Here are the two oils on this page, costed per candle. Every candle is 200 g at 8% in Luxury Soy Wax Chunks, with a ₹186.92 base of 184 g of wax, one Eco Thin C1 wick and one White Matte jar. Costs exclude labour, packaging, freight and GST.
| Roasted Coffee | Moca Coffee | Difference | |
|---|---|---|---|
| Price per gram (100 g) | ₹3.90 | ₹11.20 | ₹7.30 |
| Oil per candle | ₹62.40 | ₹179.20 | ₹116.80 |
| Material per candle | ₹249.32 | ₹366.12 | ₹116.80 |
| Oil for 200 candles (3.2 kg) | ₹12,480.00 | ₹35,840.00 | ₹23,360.00 |
| Largest in-stock pack | 1 kg ₹3,738.00 | 100 g ₹1,120.00 (500 g and 1 kg out of stock) | — |
If the premium oil wins a fair test by a clear margin at the age your customers burn, the ₹116.80 per candle may be worth it, and comparing oils by cost per finished candle shows how to weigh that. If it wins only an unfair test, perhaps because it was the older candle, you would spend ₹23,360.00 over 200 candles on a week of cure. The stock row matters too. Moca Coffee's 500 g and 1 kg are out of stock on the pull date, so a range built on it depends on 100 g restocks. Ask on WhatsApp before you commit.
The comparison kit
| Pack | Price | Per gram | Oil per 200 g candle at 8% |
|---|---|---|---|
| 15 g | ₹93.22 | ₹6.21 | ₹99.43 |
| 50 g | ₹230.00 | ₹4.60 | ₹73.60 |
| 100 g | ₹390.00 | ₹3.90 | ₹62.40 |
| 500 g | ₹1,890.00 | ₹3.78 | ₹60.48 |
| 1 kg | ₹3,738.00 | ₹3.74 | ₹59.81 |
| Pack | Price | Per gram | Oil per 200 g candle at 8% |
|---|---|---|---|
| 15 g | ₹186.00 — Out of stock | ₹12.40 | — |
| 50 g | ₹560.00 | ₹11.20 | ₹179.20 |
| 100 g | ₹1,120.00 | ₹11.20 | ₹179.20 |
| 500 g | ₹5,600.00 — Out of stock | ₹11.20 | — |
| 1 kg | ₹11,200.00 — Out of stock | ₹11.20 | — |
| Item | Used | Price |
|---|---|---|
| Roasted Coffee Fragrance Oil 100 g | 64 g | ₹390.00 |
| Moca Coffee Fragrance Oil 100 g | 64 g | ₹1,120.00 |
| Luxury Soy Wax Chunks 1 kg + 500 g | 1,472 g | ₹898.00 |
| White Matte Glass Jar × 10 (2 packs) | 8 jars | ₹708.00 |
| Eco Candle Wicks Thin C1 × 10 | 8 wicks | ₹59.00 |
| Candle Making Weighing Scale | Per-candle oil weighing | ₹354.00 |
| Total | ₹3,529.00 |
Once you have a fair verdict, record it with the ages, dates and oil lots. It is a result for this formula in your conditions. It will not automatically hold in another wax or jar, or for a new lot of the same oil. Comparing a new batch of the same scent and a repeatable mixing and curing protocol cover keeping results valid over time.
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. This page compares a ₹3.90-a-gram oil with an ₹11.20-a-gram one and tells you to choose the cheaper one unless a fair test says otherwise. We would rather you bought the right oil than the dearer one.
Oil and wax prices come from CSI's live listings pulled on 24 September 2026, with out-of-stock sizes marked. Jar and scale prices are as verified for Blog 760 on 10 September 2026, and wick prices are from the 25 September pull. Per-candle and per-season figures are plain arithmetic, shown to two decimals.
The X and Y scores are invented to illustrate the method, not results for any CSI oil. CSI publishes no cure, throw or dosage data for any oil. The 7- and 14-day ages are working checkpoints. For MSDS or IFRA documents, restock questions or test design help, message +91 7397976926.
Frequently asked questions
- My Candle Smells Weak One Day After Pouring but Much Stronger After Two Weeks — Why Does Curing Affect Fragrance Performance?
- Do All Soy Candle Fragrances Need the Same Cure Time or Can Some Fragrance Compositions Reach Good Hot Throw Faster than Others?
- My Production Team Pours Candles on Different Days — How Do I Standardise Cure Time Before Quality-Control Burn Testing?
- My Candle Has Been Curing for Two Weeks and Still Has Weak Hot Throw — At What Point Should I Stop Waiting and Reformulate It?
- My First Candles from a Production Batch Smell Weaker than the Last Ones — Could the Fragrance Oil be Settling or Mixing Unevenly?
- Customers Say My Candle Is Weak but I Can Smell It Clearly in My Workshop — How Do I Create a More Objective Hot-Throw Testing Method?
- 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?
- One Fragrance Oil Costs More but Gives Stronger Hot Throw at a Lower Dosage — How Do I Compare Fragrance Oils by Cost per Finished Candle Rather than Price per Kilogram?
Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on the product pages named on each card — Eco Candle Wicks, Premium Candle Wicking Needle and Bamboo Wick Holder. They are general product reviews, not assessments of the guidance set out here. Names, star ratings, dates and products are as recorded by Judge.me and wording is unedited. "Verified buyer" appears only on the three reviews Judge.me recorded as verified — Monika Deep, Subhankar Roy and Sneha Tamang; the reviews from Ashwini, LJ and Lalitha Jagan are published but not recorded as verified, and carry no badge.
Figures pulled 24 September 2026, CSI live pricing: Roasted Coffee Fragrance Oil ₹93.22 / 15 g, ₹230.00 / 50 g, ₹390.00 / 100 g, ₹1,890.00 / 500 g, ₹3,738.00 / 1 kg. Moca Coffee Fragrance Oil ₹186.00 / 15 g (out of stock), ₹560.00 / 50 g, ₹1,120.00 / 100 g, ₹5,600.00 / 500 g (out of stock), ₹11,200.00 / 1 kg (out of stock). Luxury Soy Wax Chunks ₹299.00 / 500 g, ₹599.00 / 1 kg. Cheapest 15 g oil in the collection ₹68.44. Wicks (25 September pull): Eco Candle Wicks Thin C1 ₹59.00 / 10 (₹5.90 each). Verified 10 September 2026 (Blog 760): White Matte Glass Jar ₹354.00 / 5 (₹70.80 each); Candle Making Weighing Scale ₹354.00.
Non-price figures and assumptions: Load is a share of finished weight: 200 g at 8% = 16 g oil + 184 g wax; four candles per oil = 64 g oil; eight candles = 1,472 g wax. Base per candle ₹186.92 (184 g Chunks at ₹599.00 / kg, Thin C1 ₹5.90, White Matte jar ₹70.80), excluding labour, packaging, freight and GST. The 200-candle season is an example. X/Y scores are invented illustrations. The 7- and 14-day ages and example dates are working choices, not specifications. Fragrance-addition temperature: follow the wax maker's instructions. Diwali 2026 falls on 8 November. Prices and availability change; the linked product pages are always authoritative.