Does a Candle Fragrance With Excellent Hot Throw When Fresh Necessarily Maintain the Same Performance After Six or Twelve Months of Storage?
Share
Does a great fresh burn predict a great burn at twelve months? It is not evidence either way. There is no published figure to appeal to: none of CSI's 107 fragrance-oil pages states a shelf life, a storage instruction or any performance-over-time data. A strong first burn tells you the oil, the load and the wick are well matched today.
What produces the evidence? Burning the aged candle. Appearance and cold throw are surface information. Hot throw is measured in the melt pool, so it has to be measured by lighting a stored unit — alongside a cool-stored control, scored the same way you scored the first burn.
What should I buy today, then? Enough oil to pour the checkpoint candles and nothing more. Zesty Lemon: 15 g ₹90, 50 g ₹200, 100 g ₹360, 500 g ₹1,720, 1 kg ₹3,400. Twelve 120 g test candles need 115.2 g — a 100 g plus a 15 g bottle, ₹450.
The verdict on the batch and on the order
There are two decisions inside this question and they deserve different answers. The stock already poured and already selling is dispatchable, subject to the same five physical gates as anywhere in this series: a crack anywhere in the glass, a wick that has drifted until it touches the wall, a wick that will not sustain a flame or that clogs and drowns, free oil pooled around the wick base, and a jar that becomes uncomfortably hot to hold during a test burn. Nothing in this guide is a reason to pull a candle that burns well.
The order is the other decision, and it is the one worth slowing down. A 1 kg bottle poured into a line that sits for a year is a bet on twelve months of performance made on two weeks of evidence. That bet is often fine. The point is that it is a bet, and that for the price of about eight test candles you can convert it into a measurement.
And if you already committed — a kilo bought, candles poured, stock held — the correct move is not regret. It is to start the checkpoint programme now with units from the batch you have, keep a cool control from the same pour if any remains unopened, and get the month-six burn on the calendar. The evidence you are missing is only ever a few months away, and it is the same evidence that makes the next purchase easy.
What a fresh burn does and does not predict
It is worth being precise here, because the honest position is narrower than either optimism or alarm.
A well-run first burn establishes, for that exact combination: that the wick reaches a full melt pool in a reasonable time; that the flame is stable and not sooting or mushrooming; that the load is releasing enough to be perceived at a distance; and that the jar is not running dangerously hot. All four are necessary. None of them is a statement about time. A candle that fails any of them fresh will not improve with storage, so the fresh burn is a valid gate — it just is not a forecast.
What changes over a hold is harder to characterise and impossible to quantify from published data. Soy and coconut-soy are soft waxes that contract as they cool, so a candle that has been through repeated warm and cool cycles carries more thermal history than a fresh pour, and the wick has been sitting in that wax throughout. Fragrance blends are mixtures, and light citrus top notes are as a class made of more volatile material than heavy woody and resinous bases — which is ordinary material behaviour, not a rate. Add them together and you get several plausible ways an aged burn might differ from a fresh one, and no arithmetic that predicts which. What replaces the prediction is the month-six burn.
Why an aged burn can differ
If the month-six or month-twelve burn does not match the baseline, there are several candidate reasons and most of them are not "the fragrance has gone". The table gives what each would look like and the observation that separates it. Note how many of them are about the wick and the pool rather than the oil.
| Candidate | What you would expect alongside | The observation that separates it | What follows |
|---|---|---|---|
| The wick is behaving differently | Slower or faster to a full pool, a different flame height, mushrooming or clogging that was not there fresh | Compare melt-pool timing and flame notes against the baseline sheet; check the wick against the control unit's wick | A wick and wax question. Re-test wick size before touching the fragrance |
| Release from the pool has changed | Pool forms normally and on time, but throw at 30 and 120 minutes scores lower than baseline on both the held unit and the control | Burn held and control side by side; if both are lower than baseline, the hold is not the only factor | Test load and wax as a pair, from one fresh pour, before changing oils |
| Storage conditions, not time | The held unit scores differently from the cool control at the same checkpoint | The control is the whole point: same pour, same cure, different room | A storage finding. Fix position and packaging first — those are the cheap levers |
| Balance shifted, intensity did not | Overall strength scores similar, but the character reads differently — the opening quieter, the base unchanged | Describe each burn tier by tier against the oil page's own note structure, not as a single score | A formulation choice for long-hold lines, not a defect. Consider a different oil for that line only |
| The burn conditions were not matched | Different room, different door state, a competing scent, a different burn duration, or a different reader | Re-run the burn under the baseline's exact conditions with the spare units | Nothing about the candle. This is why the programme keeps spares |
The last row does more damage than people expect. A burn scored in a closed bedroom in February is not comparable with one scored in an open workshop in May, and hot throw is judged by a human nose whose adaptation changes within minutes. If you can only control one thing across a year of checkpoints, control the room — same room, same door, same duration, same person, no competing scent.
Three checkpoints, three scored burns
Twelve units, three burn events, one control group. The counts and intervals below are a method rather than a standard — day 14, month 6 and month 12 because they match the way most Indian candle brands actually hold stock across a festive cycle — so scale them to your own turn and write down what you chose.
The burn score sheet
One sheet, six fields, four events. The columns below are what you fill in at day 14, month 6 and month 12; the comparison you actually care about is always held against control at the same checkpoint, and then both against the baseline.
| Field | How you record it | Why it is on the sheet | If it moves, look at |
|---|---|---|---|
| Minutes to a full melt pool | Stopwatch, from lighting to wax touching the glass all round | The pool is where hot throw comes from; no pool, no throw | Wick size, wax hardness, room temperature, jar diameter |
| Melt pool depth | Millimetres at the deepest point, eyeballed against the glass | Distinguishes a wick that is merely slow from one that is undersized | Wick size first, then load |
| Flame height and behaviour | Approximate height, plus stable / flickering / dancing | A tall or unstable flame changes both throw and safety | Wick size, draughts, oil load |
| Soot or mushrooming | Yes / no, plus a photograph of the wick tip after extinguishing | Storage can change how a wick behaves; this is the field that catches it | Wick and load, not the fragrance |
| Throw at 30 and 120 minutes | 1–5 scale from a fixed distance in the same room, same reader | The actual answer to "does it still perform?" | The control unit's score at the same checkpoint, before anything else |
| Jar temperature by hand | Comfortable / warm / uncomfortably hot after two hours | A safety gate that does not depend on instruments | Stop the burn if uncomfortably hot; that unit does not ship |
Two notes on honesty. The 1–5 throw scale is yours, not a standard, and it is only comparable within your own sheets — which is enough, because every comparison you need is internal. And the jar-temperature field is deliberately qualitative: a hand is a perfectly good instrument for "this is too hot to give a customer", and inventing a temperature threshold would be worse than useless.
Staging the purchase up the pack ladder
Zesty Lemon is a useful example because its pack ladder actually rewards scale, unlike many CSI oils where the per-gram rate is nearly flat. The table shows what each rung costs, what it costs per gram, what it costs inside a 120 g candle at 8%, and how many candles it makes — so you can see exactly how much of a commitment each rung is.
| Pack | Price | Per gram | Oil cost in a 120 g candle at 8% | 120 g candles it makes | Release it at |
|---|---|---|---|---|---|
| 15 g | ₹90 | ₹6.00 | ₹57.60 | 1 | Shortlisting a scent only — not a pour test |
| 50 g | ₹200 | ₹4.00 | ₹38.40 | 5 | A first pour and a baseline burn |
| 100 g | ₹360 | ₹3.60 | ₹34.56 | 10 | The twelve-unit checkpoint programme (with a 15 g top-up) |
| 500 g | ₹1,720 | ₹3.44 | ₹33.02 | 52 | After the month-six burn |
| 1 kg | ₹3,400 | ₹3.40 | ₹32.64 | 104 | After the month-twelve burn — largest listed pack |
Look at what the staging actually costs you in money rather than in nerves. Running the checkpoint programme on 100 g plus 15 g means paying ₹3.60 a gram instead of the kilo's ₹3.40 — a premium of ₹0.20 a gram, or ₹1.92 per 120 g candle, on 115.2 g of oil. That is ₹23.04 in total. Twenty-three rupees is the entire price of not committing ₹3,400 a year early, and it is the cheapest optionality available anywhere in a candle business.
What to buy to run it
Three purchases fund a year of evidence. Each card lists every pack CSI publishes with the per-unit rate and how many 120 g candles at 8% it covers.
| Size | Price | Per 100g | 120g candles @ 8% |
|---|---|---|---|
| 15g | ₹90 | ₹600 | ≈1 |
| 50g | ₹200 | ₹400 | ≈5 |
| 100g | ₹360 | ₹360 | ≈10 |
| 500g | ₹1,720 | ₹344 | ≈52 |
| 1kg | ₹3,400 | ₹340 | ≈104 |
| Size | Price | Per kg | 120g candles @ 8% |
|---|---|---|---|
| 1 kg | ₹399 | ₹399 | ≈9 |
| 5 kg | ₹1,996 | ₹399.20 | ≈45 |
| Size | Price | Per piece |
|---|---|---|
| Thin (C1) / 10 Wicks | ₹59 | ₹5.90 |
| Thin (C1) / 20 Wicks | ₹118 | ₹5.90 |
| Thin (C1) / 50 Wicks | ₹295 | ₹5.90 |
| Thin (C1) / 100 Wicks | ₹590 | ₹5.90 |
| Thin (C1) / 500 Wicks | ₹2,950 | ₹5.90 |
| Thin (C1) / 1000 Wicks | ₹5,900 | ₹5.90 |
What the result changes
Three outcomes, three next purchases.
If the aged burns match the baseline, buy the kilo and stop worrying about that recipe. You have earned something more valuable than the ₹23.04 the staging cost you: a documented year for one combination, which is the only honest basis for telling a retailer anything about how the product behaves on a shelf. Keep the two sealed control units and start the next batch's pair from the same habit.
If the held units differ from the control, the finding is about your storage rather than the oil, and the cheap levers come first: move the stock, box it, lower the shelf, shorten the hold for that line. Buy the 500 g rather than the kilo until the storage change has itself been through a checkpoint. Changing the fragrance at this point would swap the one part of the system you have evidence about for one you do not.
If both held and control drift from the baseline, look at the wick and the load before the oil. Re-pour a fresh set from the same bottle, cure it the same way, and burn it under baseline conditions: if the fresh pour matches the original baseline, the ageing is real and belongs to the whole system, and the answer for a long-hold line may be a base-heavier fragrance or a shorter hold. Where you are choosing between two oils for a line that sits, judge them on the aged burn and not the fresh one — that is the whole point of this guide. If you pour festive stock far in advance, plan the checkpoints before the pour: Diwali 2026 falls on 8 November.
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. The commercially convenient thing for us to write is that a strong first burn is proof enough and that you should buy the kilo today. Instead this guide tells you to buy ₹450 of oil, wait six months, and let the burn decide — which costs us a larger order now. We write it that way because a brand whose held stock performs the way it expected keeps buying for years, and a brand that commits a kilo on a fortnight of evidence and gets an unpleasant surprise in November usually blames the oil and changes supplier.
Every price, pack size and specification here comes from live CSI stock in September 2026 and links to the product page, where current pricing always takes precedence. Stated specifications are quoted only where the page states them: Zesty Lemon's up-to-10% soy load, up-to-6% paraffin load, 8–10% best-performance range, start-at-8% advice, 48–72 hour cure, 0% vanillin position and its flash point given as available on request rather than as a number; Eco Soy CSI 400's 85°C (185°F) fragrance-add instruction with two minutes of stirring, its stated 80–90 degree add range, its 100°F (37.8°C) melt point and its Eco Wicks recommendation; the Amber Shiny Glass Jar's stated 120 gm capacity and 6 cm × 6.5 cm dimensions; Eco Candle Wicks sold by count with no stated diameter. None of CSI's 107 fragrance-oil pages states a shelf life, an expiry date or a storage instruction, and this guide publishes no rate of fragrance loss, no performance-over-time curve, no sweating threshold and no accelerated-to-real-time conversion, because no such figure exists on those pages and accelerated storage does not map cleanly onto real time.
For bulk pricing above the listed packs, GST invoicing, MSDS or IFRA documentation on a specific oil, message us on WhatsApp at +91 7397976926. We will tell you what a page states; we will not certify performance at twelve months that nobody has measured.
Frequently asked questions
- Holding inventory six months: test before ordering kilograms
- Heat-aged candles before a bulk fragrance purchase
- Strong when burned, weaker cold: has fragrance been lost?
- How to test hot throw before launching a candle fragrance
- Why do citrus fragrances fade in candles — and how can you fix it?
- How to compare two fragrance oils using a controlled burn test
Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on their product pages. Names, star ratings, dates and products are as recorded by Judge.me; one longer review is shortened with an ellipsis and otherwise unedited.
Figures verified September 2026: Zesty Lemon Fragrance Oil 15 g ₹90, 50 g ₹200, 100 g ₹360, 500 g ₹1,720, 1 kg ₹3,400. Eco Soy CSI 400 1 kg ₹399, 5 kg ₹1,996. Amber Shiny Glass Jar with Black Lid Pack of 1 ₹47.20, Pack of 5 ₹236. Eco Candle Wicks Thin (C1) 10 ₹59, 20 ₹118, 50 ₹295, 100 ₹590, 500 ₹2,950, 1000 ₹5,900 — ₹5.90 each at every pack; Thick (C2) ₹9.44 each. Arithmetic: 120 g candle at 8% = 110.4 g wax + 9.6 g oil; 12 units need 1,324.8 g wax and 115.2 g oil; wax 1,324.8 × ₹0.399 = ₹528.60; oil 115.2 × ₹3.60 = ₹414.72 (100 g at ₹360 ÷ 100); jars 12 × ₹47.20 = ₹566.40; wicks 12 × ₹5.90 = ₹70.80; total ₹1,580.52, ₹131.71 a unit; one burn comparison of two units = ₹263.42; four control units = ₹526.84. Per-gram rates: 15 g ₹6.00, 50 g ₹4.00, 100 g ₹3.60, 500 g ₹3.44, 1 kg ₹3.40; oil per 120 g candle at each = ₹57.60, ₹38.40, ₹34.56, ₹33.02, ₹32.64; candles per pack at 9.6 g = 1, 5, 10, 52, 104. Staging premium: 115.2 g at ₹3.60 (₹414.72) against ₹3.40 (₹391.68) = ₹23.04, ₹1.92 a candle. 1 kg ÷ 50 g price = 17×. Listed packs bought for the programme: 2 × 1 kg wax ₹798, 100 g + 15 g oil ₹450, 3 × pack of 5 jars ₹708, 20 wicks ₹118 = ₹2,074. Planning assumptions labelled in text: 8% load as a percentage of finished candle weight; 12 units split 2 baseline / 6 held with inventory / 4 cool control; checkpoints at day 14, month 6 and month 12; 14–21 day cure convention for soy containers applied to the whole set before it splits; equilibration of all units in one room for at least several hours and ideally a day before a burn; burns of up to three hours in one room with the door closed and no competing scent; a 1–5 throw scale internal to the reader's own sheets. Unit counts, checkpoint intervals and scoring scales are this guide's method, not an industry standard. Stated specifications: Zesty Lemon "Recommended load - soy Up to 10%", "Recommended load - paraffin Up to 6%", "8-10% in soy wax", "start at 8% for your first test batch", cure "48-72 hours", "Vanillin content 0% - no discolouration or yellowing in wax", "FlashpointAvailable on request / SDS"; Eco Soy CSI 400 "add your fragrance or essential oils at 85°C (185°F), stir gently for 2 minutes, and pour directly", "Fragrance Add Temperature 80 to 90 degrees", "Melt Point 100°F (37.8°C)", "Recommended Wick Eco Wicks", fragrance load not stated; Amber Shiny Glass Jar "Capacity: 120 gm", 6 cm diameter, 6.5 cm height; Eco Candle Wicks — no diameter or jar-size guidance stated. Across the range, 32 pages state only the threshold "Flash point > 93°C (suitable for alcohol-based products)", which is a template line and not a measurement, and 18 pages state a measured value. Loads are wax and oil formulation limits, not regulatory limits; a flash point is a handling figure, not an add temperature. Not stated anywhere and therefore not claimed: shelf life, expiry, storage temperature or storage instruction on any of 107 fragrance-oil pages; any rate of fragrance loss or performance decay; any hot-throw measurement in area or distance; any accelerated-to-real-time storage conversion. Prices and availability change — the linked product pages are always authoritative.