I'm Worried That Adding Fragrance to Hot Wax Will Burn Off the Scent — How Much Fragrance Actually Evaporates During Normal Candle Production?
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What would a loss cost me? In the labelled example model, if 1% of 80 g of Citrus Lemon were lost, that is 0.80 g — ₹2.40 per 1,000 g batch — and the effective load falls from 8.00% to 7.93%. See the model.
Can my scale detect it? Only if it reads finely enough. A scale that reads to 1 g cannot reliably see a change smaller than about 2 g. Check your scale's readability first. See detection limits.
How do I keep loss low? Add the oil inside the wax maker's window (the only CSI figure on record is CSI's CSI 464 guidance, 80–90°C — confirm on the product page), pour promptly, use a jug not a wide pan, and do not re-melt scented wax repeatedly.
Why nobody can give you one number
Evaporation is not a fixed property of a fragrance oil. It is a rate, and the rate depends on the conditions. A fragrance oil is a blend of many aroma materials, and each has its own volatility. The lightest top notes, typical of citrus and fresh profiles, evaporate fastest. Heavier woods, resins and vanilla-type materials evaporate slowly. So two oils in the same jug lose different amounts. And the same oil loses different amounts depending on four conditions you control. These are mechanisms commonly described in candle-making and perfumery, not CSI measurements.
| Condition | Commonly described effect | What you control |
|---|---|---|
| The oil's composition | More light top-note material, more potential loss | Nothing in the process — but test citrus and fresh oils most carefully |
| Temperature above the wax maker's window | Hotter liquid, faster evaporation | Stay inside the window; the only CSI figure is CSI 464, 80–90°C melt and pour |
| Time hot after the oil goes in | Loss accumulates while the wax stays hot | Add the oil close to pouring; do not hold scented wax on the heat |
| Open surface area | More exposed surface, more evaporation | Use a jug, not a wide pan; cover between pours in long runs |
That is why a single percentage is misleading in both directions. A scary figure makes makers add oil to cooling wax, which causes the incorporation problems in I Added Fragrance Oil at a Lower Temperature Because I Was Afraid of Evaporation — Why Did It Not Seem to Bind Evenly into the Wax?. A reassuring figure makes them ignore a long hold on a hot plate, which can flatten the opening, as I Added Fragrance Oil to Soy Wax While It Was Very Hot and the Finished Candle Smells Weak — Could Excessive Temperature Have Affected the Fragrance? explains. The useful questions are narrower: how much does my process lose, with my oil, and does it matter? The rest of this page answers both.
A labelled example model of what loss would cost
Before measuring, it helps to know what a loss would mean if it happened. The model below takes a 1,000 g batch at 8% of the finished weight: 80 g of Citrus Lemon and 920 g of CSI 464. The oil is priced at the 100 g rate, ₹3.00 a gram, so the batch holds ₹240.00 of oil. The loss percentages are example assumptions, chosen to show the arithmetic. They are not measurements, and they are not predictions for this or any oil.
| Assumed loss of oil added | Oil lost | Oil left | Effective load | Oil value lost per 1,000 g batch | Per 1,000 candles (200 batches) |
|---|---|---|---|---|---|
| 0% (example) | 0.00 g | 80.00 g | 8.00% | ₹0.00 | ₹0.00 |
| 0.5% (example) | 0.40 g | 79.60 g | 7.96% | ₹1.20 | ₹240.00 |
| 1% (example) | 0.80 g | 79.20 g | 7.93% | ₹2.40 | ₹480.00 |
| 2% (example) | 1.60 g | 78.40 g | 7.85% | ₹4.80 | ₹960.00 |
| 5% (example) | 4.00 g | 76.00 g | 7.63% | ₹12.00 | ₹2,400.00 |
Two readings of this table matter. First, the load effect is small at small losses. Even at an assumed 2%, the effective load moves from 8.00% to 7.85%, well inside the difference between two load test points. Second, the cost effect scales with volume. At an assumed 1%, the loss per batch is ₹2.40; across 1,000 candles it is ₹480.00. With a dearer oil the same percentage costs more. That is why a business should measure its own figure once, rather than either ignore it or panic about it.
Can your scale see it?
Every scale has a readability: the smallest step its display shows, such as 1 g or 0.1 g. As a working rule, trust a difference only when it is at least about twice the readability, because a single reading can be off by one step. We have not published the readability of our Candle Making Weighing Scale in the data behind this page, so check the product page or the display before you begin. The table shows what each readability can detect in the worked batch and in a single 200 g candle.
| Scale readability | Smallest trustworthy change | As a share of 80 g (1,000 g batch) | As a share of 16 g (one candle) |
|---|---|---|---|
| 0.1 g | about 0.2 g | 0.25% of 80 g | 1.25% of 16 g |
| 0.5 g | about 1 g | 1.25% of 80 g | 6.25% of 16 g |
| 1 g | about 2 g | 2.50% of 80 g | 12.50% of 16 g |
The lesson is practical. With a 1 g scale, run the test on the whole 1,000 g batch rather than one candle, or you will not see anything smaller than 12.5% of a candle's oil. With a 0.1 g scale, a batch test can detect a loss of 0.25% of the oil. If your result is smaller than the trustworthy change for your scale, the honest answer is "too small for this scale to see", which is itself useful: it means evaporation is not your problem.
The two-jug weigh test
The test compares a scented jug with an identical unscented control, treated the same way. Weighing the scented jug alone would mix up fragrance loss with everything else that changes weight: wax behaviour, residue, a scale that drifts as it warms. The control cancels those out.
Here is the arithmetic with hypothetical readings, to show the method. These are example numbers, not a measurement of Citrus Lemon or any other oil. Say Jug A reads 1,412.6 g at T0 and 1,411.2 g at T1, a drop of 1.4 g. Jug B reads 1,331.9 g and 1,331.6 g, a drop of 0.3 g. The fragrance-attributable loss is 1.4 − 0.3 = 1.1 g, which is 1.37% of the 80 g added. The effective load would be 7.90% instead of 8.00%. On a 0.1 g scale, 1.1 g is a trustworthy difference; on a 1 g scale it would not be.
| Reading | Jug A (wax + oil) | Jug B (wax only) |
|---|---|---|
| T0 — right after the oil goes in | 1,412.6 g | 1,331.9 g |
| T1 — just before pouring | 1,411.2 g | 1,331.6 g |
| Drop | 1.4 g | 0.3 g |
| Fragrance-attributable loss | 1.4 − 0.3 = 1.1 g | — |
| As a share of oil added | 1.1 ÷ 80 × 100 = 1.37% | — |
| Effective load | 7.90% instead of 8.00% | — |
Reading your result
Once you have your own figure, the decision is simple. The table below sets out what to do at each level. The bands are working decision points for your own process, not published thresholds.
| Your result | What it means | What to do |
|---|---|---|
| Smaller than your scale can trust | Evaporation is not a meaningful factor in your process | Stop worrying about it; look at load, wick and cure. Variables to test |
| Small and trustworthy | A real but minor loss | Keep your process; note the figure in your batch record |
| Grows with each holding interval | Holding time is driving the loss | Add the oil closer to pouring; pour in smaller runs. Large batches |
| Much larger in a wide pan than a jug | Surface area is driving it | Mix and hold in a jug, not a pan |
| Large even when fast and in a jug | Check the wax temperature and the thermometer | Confirm you are inside the wax maker's window; check the thermometer against melting ice |
Whatever the result, resist two temptations. Do not add extra oil to cover a loss, unless the loss is measured, repeatable and the new total stays below the wax maker's ceiling. And do not start adding oil to cooler wax to protect it; the incorporation problems of I Added Fragrance Oil at a Lower Temperature Because I Was Afraid of Evaporation — Why Did It Not Seem to Bind Evenly into the Wax? are a bigger risk to the candle than a small, measured evaporation loss.
Priced shopping list
| Pack | Price | Per gram | Candles at 16 g |
|---|---|---|---|
| 15 g | ₹81.42 | ₹5.43 | 0.94 |
| 50 g | ₹170.00 | ₹3.40 | 3.12 |
| 100 g | ₹300.00 | ₹3.00 | 6.25 |
| 500 g | ₹1,420.00 | ₹2.84 | 31.25 |
| 1 kg | ₹2,832.00 | ₹2.83 | 62.50 |
| Pack | Price | Per gram | Candles at 16 g |
|---|---|---|---|
| 15 g | ₹68.44 | ₹4.56 | 0.94 |
| 50 g | ₹212.40 | ₹4.25 | 3.12 |
| 100 g | ₹354.00 | ₹3.54 | 6.25 |
| 500 g | ₹1,652.00 | ₹3.30 | 31.25 |
| 1 kg | ₹3,068.00 | ₹3.07 | 62.50 |
| Pack | Price | Per kg | 200 g candles at 184 g wax |
|---|---|---|---|
| 500 g | ₹260.00 | ₹520.00 | 2.72 |
| 1 kg | ₹507.40 | ₹507.40 | 5.43 |
| 5 kg | ₹2,537.00 | ₹507.40 | 27.17 |
| 10 kg | ₹5,074.00 | ₹507.40 | 54.35 |
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. A supplier could profit from a scary evaporation figure that makes you add extra oil. We do not publish one, because we have not measured it and it varies with your process. This page gives you a way to measure it yourself, and tells you how to run the test without buying a second jug from us.
Every oil and wax price on this page comes from live CSI listings pulled on 24 September 2026. Wick, jar, thermometer and scale prices are those verified for Blog 760 on 10 September 2026; the pouring jug comes from the 24–25 September catalogue pull. The only temperature quoted is CSI's own guidance for CSI 464 (80–90°C melt and pour); confirm it on the product page.
The loss percentages in the model and the jug readings in the worked example are labelled example assumptions and hypothetical numbers, not measurements of any oil. Mechanisms of evaporation are general candle-making and perfumery knowledge. The 2 × readability rule and the decision bands are working practice. For your wax's instructions, MSDS and IFRA documents, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- I Added Fragrance Oil to Soy Wax While It Was Very Hot and the Finished Candle Smells Weak — Could Excessive Temperature Have Affected the Fragrance?
- I Added Fragrance Oil at a Lower Temperature Because I Was Afraid of Evaporation — Why Did It Not Seem to Bind Evenly into the Wax?
- What Actually Happens if I Add Fragrance Oil to Soy Wax at the Wrong Temperature Even When the Candle Looks Visually Normal?
- Does a Fragrance Oil's Flash Point Tell Me the Temperature at Which I Should Add It to Candle Wax or Are These Two Different Things?
- I Add Fragrance at the Correct Temperature but Only Stir for 20 Seconds — Could Inadequate Mixing be Causing Inconsistent Scent Throw?
- How Long Should I Mix Fragrance Oil into a Large Batch of Wax so the First Candle and Last Candle Have the Same Fragrance Concentration?
- My Citrus Candle Smells Fresh When Cold but the Top Notes Disappear Quickly While Burning — Why Are Some Fragrance Notes Harder to Retain in Candles?
- I Need Enough Fragrance Oil for 500 × 200 g Candles at 8% Load — How Much Should I Order After Including Formulation Trials and Production Wastage?
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: Citrus Lemon Fragrance Oil ₹81.42 / 15 g, ₹170.00 / 50 g, ₹300.00 / 100 g, ₹1,420.00 / 500 g, ₹2,832.00 / 1 kg. Eucalyptus Spearmint Fragrance Oil ₹68.44 / 15 g, ₹212.40 / 50 g, ₹354.00 / 100 g, ₹1,652.00 / 500 g, ₹3,068.00 / 1 kg. Luxury Soy Wax CSI 464 ₹260.00 / 500 g, ₹507.40 / 1 kg, ₹2,537.00 / 5 kg, ₹5,074.00 / 10 kg. Candle Wax Pouring Jug ₹531.00 (24–25 September 2026 catalogue pull). Figures verified 10 September 2026 (Blog 760): Candle Making Weighing Scale ₹354.00; Pen Thermometer ₹354.00; Eco Candle Wicks Thin C1 ₹59.00 / 10 (₹5.90 each); White Matte Glass Jar ₹354.00 / 5 (₹70.80 each).
Non-price figures and assumptions: Load is the share of the finished candle weight (oil = W × L); the model batch is 1,000 g at 8% (80 g oil + 920 g wax). Loss percentages in the model (0.5%, 1%, 2%, 5%) are illustrative assumptions, not measurements. The jug readings in the worked example are hypothetical numbers used to show the method. Effective load after loss = oil left ÷ (batch − oil lost). The 2 × readability rule and the decision bands are working practice. The scale's readability is not published in the data behind this page; check the product page. The only temperature quoted is CSI's own guidance for CSI 464, 80–90°C melt and pour; confirm on the product page. Fragrance ceilings (Luxury Soy Wax Chunks up to 13%, CSI 464 up to 10%) are the wax makers' stated formulation maximums, not regulatory limits. Eucalyptus Spearmint's 13.3% compares its 1 kg and 100 g per-gram prices. Material costs exclude labour, packaging, freight and GST. Prices and availability change — the linked product pages are always authoritative.