Should I Compare Room-Temperature Jars and Pre-Warmed Jars Using the Exact Same Wax Batch?
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Clear 130ml jars ₹47.20 each Container soy wax from ₹399 / kg · 500g to 50kg Stocked in India · ships nationwide
CSI method guides · the paired batch
Two pots are two experiments. One pot, split in half and photographed on a schedule, is the only comparison that can answer anything.
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Eco Candle Wicks
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"Ordered soy wax, fragrance oils, wax and thermometer — everything was great quality!…"
RenuVerified buyer · Jul 2026
Gilli Mitti Fragrance Oil
★★★★★
"The jars were of good quality"
Soumili GopeVerified buyer · Mar 2026
Clear Glass Jar with Golden Lid 150 gram
★★★★★
"I love all the products...I received it without any damages...love to reorder again❤️"
Kaushiki SatarkarVerified buyer · Apr 2025
Luxury Soy Wax Chunks
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"I liked it"
Raajull BhattVerified buyer · Oct 2025
Mini Electric Wax Melter
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"Good one"
Sneha TamangVerified buyer · Apr 2025
Premium Candle Wicking Needle
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"Quality wick, works very well"
AshwiniSep 2025
Eco Candle Wicks
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✓ One wax batch, one day, one variable ✓ All 20 test candles stay saleable ✓ Bulk pricing & GST invoicing on WhatsApp
Candle Business Guides · The Paired Batch
Yes — and not only the same batch, but the same pot, the same day, the same minutes of pouring, poured alternately so neither half gets the better wax. Twenty jars split ten and ten, five fixed photo checkpoints, one hundred photographs, and every candle still saleable at the end.
10 + 10
one pot, one day, twenty jars poured alternately, five fixed checkpoints, 100 photographs · ₹3,686.80 of materials that all remain saleable product, so the test costs time rather than stock · CSI live pricing, September 2026
Quick answers — read this first
Same batch, or is same product enough? Same pot. Not the same wax, not the same lot, not the same day — the same melt. Two pots differ in melt history, stirring, oil distribution, how long they sat and what temperature they were at when each jar was filled, and every one of those differences is larger than the effect you are hunting.How many jars? Twenty, split ten and ten, and poured alternately: warmed, room temperature, warmed, room temperature. Alternating is the whole trick — it means both halves share the same falling pour temperature instead of one half getting the top of the pot and the other the tail.
What do I record? Five checkpoints, photographed identically: at the pour, 2 hours, 24 hours, 7 days, and after a temperature cycle you run yourself. A gap visible at the pour is a different event from one that opens on day two or after a week, and only a timed series separates them.
What does it cost? ₹3,686.80 of materials on the basket below — and all twenty candles are saleable if they pass, so the real cost is a week of elapsed time and about an hour of logging. Buy the scale and thermometer once at ₹354 each if you do not have them.
The short answer
One pot, one variable, alternated: if you change the glass treatment, nothing else may move — not the wax, the lot, the oil, the load, the fill weight, the wick, the wick position, the cooling surface, the spacing or the lid timing. A test with two changes in it has no interpretation at all.
Run it on your production wax, not a candidate: the question is whether warming helps your candle. Swapping in a different wax to "test properly" changes the thing you are measuring. Candidate waxes get their own paired test, later, one at a time.
Photograph on a schedule and grade blind: same distance, same light, same background, five fixed checkpoints. Then shuffle the jars and grade them against two printed photographs — a pass and a fail — before you look at which half is which.
In this guide
The two things that make this valid are the single pot and the alternating pour order. Everything else in the picture is bookkeeping — but the bookkeeping is what lets you compare this test with the next one, and with the one you run again next winter.
Cheap clear glass for twenty jars
Yankee Glass Jar 130 ML · ₹47.20
Keeps the wick identical in all 20
Wick Centering Device · ₹118 for 5
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Straight answer
Does the warmed-versus-unwarmed comparison have to come from the same wax batch?
It has to come from the same pot, which is stricter than the same batch. The effect you are trying to see is small — on a ₹249.80 candle, preheating only needs to shift cosmetic rejects by 0.67 of a percentage point to pay for itself — and almost every uncontrolled variable in candle making is bigger than that. Two pots from the same bag differ in how long the wax was held, how thoroughly the oil was stirred in, what the thermometer read when each jar was filled, and how the room had changed by the second melt. So: one melt, twenty jars, ten warmed and ten straight off the shelf, poured alternately — warmed, room temperature, warmed, room temperature — so both halves share the same falling pour temperature. Freeze everything else: one wax, one lot, one oil, one load, one weighed fill, one wick, one wick position, one cooling surface, one spacing, one lid rule. Photograph all twenty at five fixed checkpoints — at the pour, 2 hours, 24 hours, 7 days, and after a temperature cycle you run and record yourself — from the same distance in the same light, which comes to 100 photographs. Then shuffle the jars and grade them blind against one printed pass and one printed fail before you look at which half is which. On the basket below that is ₹3,686.80 of materials, every rupee of which stays saleable product if the batch passes. The test costs you a week and an hour of logging, not stock.
One line: one pot, twenty jars, ten and ten poured alternately, five photographed checkpoints, graded blind — and every other variable written down and left alone.
Everything the rig needs and keeps: Yankee Glass Jar 130 ML ₹47.20 each, Wick Centering Device ₹118 for five, Candle Making Weighing Scale ₹354, Pen Thermometer ₹354. The jars and wax are production stock, not test spend.
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Why one pot, and not just one product
Two pots of the same wax are two different waxes with the same name on the bag.
"Same wax batch" is usually understood to mean the same product, maybe the same bag. That is not tight enough, and it is worth being specific about why, because the looseness is where most home-made comparisons fall apart. Here is what differs between two melts of the identical wax from the identical bag on the identical day.
What changes between two pots of the same wax
Every row is plausibly larger than the effect you are measuring
| Difference between pot A and pot B | Why it is not controllable by intention | Effect it can imitate |
|---|---|---|
| How long the wax was held molten before pouring | You cannot repeat "about ten minutes" to the minute across two sessions | Everything from surface finish to how the oil sits in the wax |
| How thoroughly the fragrance was stirred in | Two minutes of your stirring is not two minutes of your stirring an hour later | Uneven oil distribution, which shows up as patchiness of several kinds |
| Thermometer reading at each individual jar | The pot cools on its own schedule; jar 7 of pot A is not jar 7 of pot B | Precisely the variable you are trying to hold still |
| Room temperature between the two melts | An Indian workshop can move several degrees across one morning | The glass temperature of the "room temperature" half — your own control |
| Where each batch cooled, and how crowded the bench was | Outer jars in a group do not cool like centre jars | One-sided gaps and bands, which look like adhesion findings |
| Fill weight drift as you get tired or hurried | Eye-judged fills vary by several grams across twenty jars | Cooling-profile differences that mimic the glass effect exactly |
Read that list and the design follows by itself. If those six things cannot be held constant between two sessions, then both halves of the comparison must happen inside one session, from one pot, within the same minutes. Everything in this guide is downstream of that one constraint.
The mistake: pouring the warmed jars first because they are ready. It is the most natural thing in the world — the warm jars come out of the carton, you pour them while they are warm, and then you do the cold ones. It also quietly hands the warmed half the hottest wax in the pot and gives the control half the tail of a falling pour temperature. In a cold workshop that difference can be substantial, and it points in exactly the direction you were hoping for, which is why it is so hard to spot afterwards. Alternate: warmed, room temperature, warmed, room temperature. If your warming method cannot survive being used on alternate jars, change the method rather than the pour order — the pour order is load-bearing.
The design · ten and ten, alternated
Twenty jars is the smallest number that is worth the day, and ten per group is the smallest group that lets you say something like "three of ten against seven of ten" without it being one jar's opinion. It is also honest about its limits: twenty jars cannot measure a fraction of a percentage point, so this test is built to detect a difference large enough to matter commercially and nothing finer. If the effect is subtler than three or four jars in ten, you will need the sixty-jar version and a costed break-even, which is a different job.
Why clear glass, and why a cheap one? Because the symptom is only a symptom in clear glass, and because at twenty jars the vessel is the biggest single line in the basket. A Yankee Glass Jar 130 ML with Clear Cap at ₹47.20 keeps the rig affordable; a Clear Glass Votive Jar 70 gram at ₹31.86 is cheaper still and uses less wax. But there is a catch that matters more than price: if you are deciding about a production process, run the test in the jar you actually sell. Wall, base, shape and taper all differ between vessels and none of it is published, so a result from a test jar does not transfer to your product jar. Use a cheap jar to learn the method; use your own jar to make the decision.
What is frozen and what is allowed to vary
Write this list out before the day and tick it as you go. The single variable is the glass treatment. Everything else on the left is frozen, and the freezing is not pedantry — each one of them has its own post in this cluster precisely because each one can produce the symptom on its own.
The one variable, and the sixteen things that must not move
Tick the frozen column before you melt anything
| Frozen | How to freeze it | Why it matters here |
|---|---|---|
| Wax product and lot | One bag, opened for this test, noted by date | A new lot is a change even when the product is identical |
| Melt, hold and add temperatures | Follow the page: 80–90°C add on Luxury Soy Wax Chunks, 85°C with two minutes of stirring on Eco Soy CSI 400 | These are the only temperatures anyone has published; use them as written |
| Pour temperature band | Stay inside the page's window — 70–80°C on Chunks, 80–90°C on CSI 464, 58–60°C on CSI 468 — and inside the jar's ceiling where one is stated | Pour temperature has its own paired test; it is not this one |
| Fragrance oil, load and stirring time | One oil, one load, one timed stir, all in one pot | An unscented control adhering better than a scented one is a separate experiment |
| Fill weight | One gram figure, every jar on the ₹354 scale | Fill depth changes the cooling profile and imitates the glass effect |
| Wick type, size and position | One wick, centred the same way in all twenty with a ₹118 centring device | A leaning wick is both a safety fault and a confound |
| Jar product and carton | One listing, ideally one carton | Two cartons of the same listing can differ in wall and base — nothing is published |
| Jar cleaning and handling | Same wash, same dry, same rim-only handling for all twenty | Cleaning and fingerprints are their own differential branch |
| Cooling surface, spacing and position | One surface, measured spacing, and rotate positions so neither group sits at the edge | Outer jars genuinely cool differently; position must not correlate with group |
| Lid timing | Lids off until a stated hour, then on, for all twenty | Changes the cooling rate at the surface |
| Dye | None, or the same dose in one pot | Dye goes in last and has its own posts; no CSI dye page states a dose |
| Room temperature log | Noted at the start, at pouring and at each checkpoint | It is the context your whole result depends on |
| Camera, distance, light and background | One mark taped on the bench, one fixed phone position | Two lighting setups will out-argue any adhesion effect you find |
| Checkpoint times | At the pour, 2h, 24h, 7 days, after a cycle | Timing is what separates pour-side from cooling-side from storage-side causes |
| Grading standard | One printed pass photo, one printed fail photo, decided in advance | A drifting tolerance produces whatever answer you wanted |
| Who grades, and whether they know the groups | Shuffle, cover the labels, grade before revealing | At ten jars a group, expectation alone can move the count |
Number the jars on the base, not the side
Write 1 to 20 on the base of each jar in marker before you pour, with odd numbers for the warmed group. Numbering on the base means you can shuffle and grade blind at day 7 without seeing the number, then turn each jar over to record the result. Numbering on the side destroys the blind grading, and labelling with stickers destroys the photograph. It takes two minutes and it is the difference between a test and an impression.Five checkpoints, one hundred photographs
The checkpoints are not arbitrary. Each one answers a different question, and skipping any of them turns a specific finding into a vague one. A hundred photographs sounds like a lot; it is five minutes of work five times, and it is the entire evidential value of the exercise.
What each checkpoint tells you
Twenty photographs each, same distance, same light, same background
| Checkpoint | When | The question it answers | What a difference here means |
|---|---|---|---|
| 1 · At the pour | Within ten minutes of filling the last jar | Did anything look wrong before the wax even set? | A fill, cleanliness or handling issue, not an adhesion one |
| 2 · 2 hours | While the wax has set but is still warm | Is a gap opening during the main solidification? | The clearest pointer at the pour-and-set side of the process |
| 3 · 24 hours | Next morning, before any handling | Did it appear overnight as the candle came to room temperature? | The commonest timing, and the one glass treatment most plausibly affects |
| 4 · 7 days | One week, lids on, undisturbed, same room | Is it stable, growing, or has it closed again? | This is the checkpoint you grade blind and count — your decision point |
| 5 · After a temperature cycle | After a hold-move-hold routine you define and write down | Will it survive a courier and a shop window? | A gap that only appears after cycling is a transit finding, not a pour finding |
On checkpoint five, be careful and be honest. A temperature cycle is a useful thing to run — hold the candles somewhere warm for a stated number of hours, move them somewhere cool for a stated number, hold again, photograph at each move — and every temperature and every duration in it is your choice, not a standard. There is no published protocol, no accepted cycle, and above all no conversion from an accelerated cycle to real-world time. Anyone offering you "one cycle equals three weeks in transit" is guessing. Write down what you did, compare the two halves against each other, and claim nothing beyond that.
The costed basket
Here is the whole rig, priced. The example pours twenty Yankee Glass Jar 130 ML containers at an assumed 120g fill and a 10% fragrance load, on Luxury Soy Wax CSI 464 with Lavender Fragrance Oil. The 120g figure is an assumption, flagged as one, because that page states capacity in millilitres, not grams — weigh one filled jar before you buy the wax and adjust every line.
Twenty-jar paired-test basket · CSI live pricing, September 2026
What to order, and which lines are consumed versus kept
| Line | Pack ordered | Price | Why it is in the basket |
|---|---|---|---|
| Yankee Glass Jar 130 ML with Clear Cap | 20 × ₹47.20 | ₹944 | Clear glass, so the symptom is visible at all |
| Luxury Soy Wax CSI 464 | 2 × 1 kg + 1 × 500 g | ₹1,274.80 | 2,160g needed for twenty jars; 340g spare for spills and top-ups |
| Lavender Fragrance Oil | 2 × 100 gm + 1 × 50 gm | ₹1,350 | 240g needed; 10g spare. 100 gm is ₹5.40/g, the same rate as 50 gm |
| Eco Candle Wicks · Thin (C1) | 20 wicks | ₹118 | One per jar, identical across both halves |
| Materials subtotal | — | ₹3,686.80 | All of it saleable product if the batch passes |
| Wick Centering Device | Pack of 5 | ₹118 | Keeps wick position from becoming a second variable |
| Candle Making Weighing Scale | 1 | ₹354 | Fill weight is the easiest thing to get wrong and the worst to get wrong |
| Pen Thermometer | 1 | ₹354 | Three readings per batch; a probe for liquid, never for glass |
| Basket total with instruments | — | ₹4,512.80 | The three instruments are bought once and used for every test after |
Worked out above: 120g fill at a 10% fragrance load = 108g wax + 12g oil per jar. Twenty jars = 2,160g of wax and 240g of oil. Wax at CSI 464's ₹507.40/kg: 1 kg ₹507.40 × 2 + 500 g ₹260 = ₹1,274.80 for 2.5 kg. Oil at Lavender's 100 gm price of ₹540 (₹5.40/g): ₹540 × 2 + ₹270 = ₹1,350 for 250g. Wicks: Eco Candle Wicks Thin (C1) 20 Wicks ₹118, which is ₹5.90 each — the same per-wick price at every listed pack from 10 to 1,000. Jars: 20 × ₹47.20 = ₹944. Materials subtotal ₹944 + ₹1,274.80 + ₹1,350 + ₹118 = ₹3,686.80. Per finished candle that is ₹47.20 + ₹54.80 of wax + ₹64.80 of oil + ₹5.90 of wick = ₹172.70, and ₹172.70 × 20 = ₹3,454 of material actually consumed, the balance being the spare wax and oil you keep. Assumptions labelled: the 120g fill is this guide's assumption because the Yankee jar page states 130 ML and not a gram capacity — weigh your own filled jar; the 10% load is expressed as a percentage of total wax weight with the finished-candle equivalent shown and sits at CSI 464's stated ceiling of up to 10%; the spare wax covers the 3–5% planning allowance for spills and top-ups.
1
The test vessel · cheapest clear glass with a lid
Yankee Glass Jar 130 ML with Clear Cap
At ₹47.20 a jar, twenty of them cost ₹944 — which keeps a twenty-jar rig affordable without pouring into something so small the symptom is hard to read. Clear glass with a clear cap, so you can photograph the wall and run the lids-on part of the schedule. Read the page carefully though, because it is a good example of the gap this whole series works around: it states "130 ML Yankee Glass Jar" and no dimensions, no glass thickness and no hot-pour ceiling. Millilitres are not grams and wax is not water, so weigh one filled jar first and build your plan on that figure. Only 18 of CSI's 78 container pages state a numeric diameter at all, and not one states a wall thickness — which is exactly why this test exists.
| Size | Price | Per piece |
|---|---|---|
| Default Title | ₹47.20 | — |
₹944 for twenty · the largest single line in the basket, and the one that makes the symptom visible Buy the clear 130 ML jar
2
Why the method exists · a page that states nothing
Premium Coconut Soy Wax
The clearest argument for running your own paired test is a product page with nothing on it to argue from. At ₹920 a kilo — 500 g ₹460, so the per-kilo price is flat — this is the dearest container wax in the range, and its page states no fragrance load, no melting point, no pour temperature and nothing at all about appearance or frosting. It is described for "a wide range of container types". That is not a criticism of the wax; it is the condition most makers are working in, and it means every number in your process has to be yours. If this is your production wax, the paired test is not an optional refinement — it is the only information you will ever have about how it behaves against your glass. Run it with four pour-temperature rungs rather than three, and photograph every one.
| Size | Price | Per kg | 120g candles @ 10% |
|---|---|---|---|
| 500g | ₹460 | ₹920 | ≈4 |
| 1 kg | ₹920 | ₹920 | ≈9 |
₹99.36 of wax in a 120g candle at a 10% load · and not one published figure to plan it with Buy Premium Coconut Soy Wax
3
The ₹118 that stops wick position becoming variable two
Wick Centering Device (Pack of 5)
A pack of five at ₹118, which is ₹23.60 each, and the cheapest way to make "everything else identical" true rather than aspirational. A wick that drifts a few millimetres off centre changes where the melt pool meets the glass, and a wick leaning against the wall is both a confound and a genuine safety fault — one of the few in this whole series, because gaps are cosmetic and a leaning wick is not. Five devices let you set four jars at a time through twenty. CSI also lists a Bamboo Wick Holder set of five at ₹118 and Steel Wick Holders from ₹250 for five; any of them does the job as long as all twenty jars get the same one. A process tool is judged on one thing only — whether it does the same thing twenty times in a row.
| Size | Price | Per piece |
|---|---|---|
| Default Title | ₹118 | — |
₹23.60 each · spent once, reused on every test in this cluster Buy the centring devices
Test passed and ready to scale? Luxury Soy Wax CSI 464 is ₹507.40/kg flat from 1 kg to 10 kg, Eco Candle Wicks C1 are ₹5.90 each from 10 to 1,000, and Lavender Fragrance Oil runs to 1 kg at ₹5,221. For recurring volumes above the listed packs, bulk pricing and GST invoicing are handled on WhatsApp.
Order in bulk on WhatsApp
Running it on the day
Allow a morning for the pour and five short visits afterwards. The order below matters: everything that can be done before the wax melts should be done before the wax melts, because once a pot is at temperature you are working to its clock rather than your own.
1
Prepare the rig coldNumber all twenty jars 1 to 20 on the base, odd numbers for the warmed group. Wash and dry all twenty the same way and handle them by the rim only from here on. Stick and centre the wick in every jar. Weigh one filled jar with water or with wax from a previous batch to establish your gram fill, and write that number on the sheet. Tape a mark on the bench for the camera and set the light you will use at every checkpoint.
2
Write the whole plan on one sheet before meltingRoom temperature now. Wax, lot and pack. Oil, load and stir time. Fill weight. Wick. Warming method in one sentence with its dwell time. Cooling surface and spacing. Lid rule. Five checkpoint times with dates. Your printed pass and fail photographs clipped to it. If any line is blank, fill it in now rather than deciding it at 80°C with a jug in your hand.
3
Start the warming on the odd jars, then meltBegin the warming so that its dwell time ends roughly when the wax reaches pouring temperature. Melt the full 2.16kg in one pot. Add the fragrance at the temperature the page states — 80–90°C on Luxury Soy Wax Chunks, 85°C with a two-minute stir on Eco Soy CSI 400, and follow your own wax's wording — and stir for the time you wrote down, not for as long as it feels right.
4
Pour 1, 2, 3, 4 … 20, alternating, weighing each jarJar 1 warmed, jar 2 room temperature, jar 3 warmed, and so on. Every jar on the scale to the one gram figure. Read the thermometer at jars 1, 10 and 20 and write all three down. Keep the pot inside its published pour band — if the reading at jar 20 has fallen below it, record that, because it is a finding about your batch size rather than about the glass.
5
Cool them in a deliberate arrangement, not a convenient oneMeasured spacing on one surface, and arrange the two groups so that neither one occupies the edge of the tray — alternate them in the cooling layout too, or rotate halfway. Lids off until the hour you specified, then on for all twenty. Photograph checkpoint one within ten minutes of the last jar.
6
Checkpoints two to four, then grade blind and countTwenty photographs at 2 hours, twenty at 24 hours, twenty at 7 days, same mark, same light. At day 7, shuffle all twenty jars so you cannot see the numbers, grade each one pass or fail against the two printed photographs, write the grades down, and only then turn them over to reveal the groups. Count both halves. Then run your temperature cycle, photograph checkpoint five, and file the sheet with the photographs and the date.
Reading the result honestly
Three rules for the end of the test, and the third is the one people break.
First, report counts, not percentages. "Two of ten against six of ten" is a true statement about twenty jars. "20% against 60%" invites you to treat a twenty-jar test as a measurement of your production reject rate, which it is not. Keep the raw counts in your log for ever; they are comparable with the next test in a way that a percentage is not.
Second, a difference of one jar is not a difference. At ten per group, a single jar moving between pass and fail is well within the noise of a marker pen and a Tuesday. Treat a gap of one as "no finding, repeat it" and a gap of three or more as something you can act on. Two is a genuine maybe, and the honest response to a maybe is a second paired batch rather than a decision.
Third, the result applies to this jar, this wax, this oil, this load and this season — and nothing else. That is not a disclaimer, it is the actual scope. Change the jar and you have changed the wall, the base and the shape, none of which is published, so a new jar is a new qualification. Change the wax and you have changed the pour band. Pour the same test in April and the glass side of the comparison has moved. Write the scope on the sheet beside the result, because in nine months you will want to know what the result was about.
The mistake: grading at day 7 with the numbers showing. Everything else in this method is protection against variables; blind grading is the only protection against you. A borderline jar in the warmed group becomes a pass and the identical jar in the control becomes a fail, entirely unconsciously, and the effect is easily worth two or three jars in twenty — which is the whole size of the finding you are looking for. Shuffle, cover, grade, then reveal. If you can hand the grading to someone who does not know what the test is about, do it; if not, grade from the photographs rather than the jars, in a different session from the one in which you poured them.
The CSI principle
One pot, one day, one variable. Every shortcut you take is a cause you can no longer rule out.
The reason this method looks fussy is that the effect is small and the confounds are large. Alternating the pour order, weighing every fill and grading blind cost you about forty minutes between them, and each one removes a candidate explanation that would otherwise survive the test and come back next winter.
Reusing the rig for every other question
Build it once and it answers the rest of the cluster, because every question in this family has the same shape: one pot, two treatments, twenty jars, five checkpoints, blind grading. Only the treatment on the left changes.
The same twenty-jar rig, six different questions
One variable each time; everything in the frozen list stays frozen
| Question | Group A | Group B | What a clear result tells you |
|---|---|---|---|
| Does warming the glass help? | 10 warmed, stated method and dwell | 10 straight off the shelf | Whether to add a labour step — then cost it |
| Does cleaning help? | 10 washed twice and handled by rim only | 10 handled as usual | Whether fingerprints or residue are in play at all |
| Does pour temperature help? | 10 at the bottom of the published band | 10 at the top, inside the same window | A free fix, judged on the wall and the top together |
| Does the cooling position matter? | 10 on the usual surface | 10 on a board or rack away from draughts | Usually a free fix, and often the largest one |
| Is the fragrance involved? | 10 at your production load | 10 unscented from a split pot | If unscented adheres better, the lever is load before wax |
| Is a candidate wax better? | 10 of your production wax | 10 of the candidate, same jar and oil | Whether a permanent cost-per-candle increase is earned |
A word on that last row, because it is the one with money attached. A candidate wax cannot be tested in the same pot as your incumbent — two waxes are two melts by definition — so it is the one comparison where "same day, same room, same jar, same oil, same load, same wick, same cooling" is the best you can do, and you should say so in the log. Everything else in the cluster can be done properly from one pot. Where you cannot pour from one pot, run the two melts back to back within the same hour, alternate the cooling positions, and treat the result as weaker evidence than a true paired batch. That weakening is also why a wax change belongs last in the cost order rather than first.
A hundred photographs cost you nothing and settle an argument you would otherwise have every winter.
— CandleMakingSuppliesIndia
Why trust this guide
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. The reason this page is a method rather than a recommendation is that we cannot honestly give you the recommendation: no CSI wax page makes any statement about glass adhesion, and not one of CSI's 78 container pages states a glass thickness. We would rather hand you a rig that produces your own answer in your own jar than sell you a wax on a claim nobody has published.
Every price and pack here comes from live CSI stock in September 2026 and links to the product page, which is authoritative on current pricing. Temperatures are quoted only where a page states them — the pour bands on CSI 464, CSI 468 and Luxury Soy Wax Chunks, the add temperatures on Luxury Soy Wax Chunks and Eco Soy CSI 400, and the 85°C hot-pour ceiling on the jars that publish one. Where a page is silent, including Premium Coconut Soy Wax on every specification and the Yankee jar on dimensions and ceiling, this guide says so. The temperature cycle at checkpoint five is the reader's own protocol with the reader's own temperatures and durations; there is no published standard cycle and no conversion from accelerated cycling to real-world time. No acceptable cosmetic reject percentage is published or asserted — that tolerance is your brand's decision.
For bulk pricing on jars, wax, oils and wicks once a test has passed, GST invoicing, or MSDS and IFRA documentation on a fragrance oil, message us on WhatsApp at +91 7397976926.
Frequently asked questions
Can I compare preheated and room-temperature jars on different days?
No — not in a way that can decide anything. Between two sessions the room temperature moves, the melt history differs, the stirring differs and the thermometer reading at each jar differs, and every one of those is plausibly bigger than the effect you are hunting. The only valid version is one pot, one day, poured alternately. If you genuinely cannot do both halves in one session, pour the two melts back to back within the same hour and record the result as weaker evidence.
How many jars do I need to compare warmed and unwarmed glass?
Twenty — ten in each group — is the smallest useful rig, and it detects only a difference large enough to matter commercially. At ten per group, a gap of one jar is noise, two is a maybe that deserves a repeat, and three or more is actionable. If you need to resolve something finer, because the break-even cut is a fraction of a percentage point, you need the sixty-jar version and a costed target before you start.
What should I photograph and when?
All twenty jars at five fixed checkpoints: at the pour, 2 hours, 24 hours, 7 days, and after a temperature cycle you define — one hundred photographs in total. Same camera position from a taped mark, same distance, same light, same background every time. The timing is the information: a gap visible at the pour points at fill or handling, one that opens at 24 hours is the commonest pattern, and one that only appears after cycling is a transit finding rather than a pouring one.
Does the test have to use the jar I actually sell?
To make a production decision, yes. Wall thickness, base thickness, shape and taper all affect how heat leaves a jar, and none of it is published on any of CSI's 78 container pages — only 18 even state a numeric diameter. So a result from a cheap test jar teaches you the method but does not transfer to your product. A new jar is a new qualification even at the same stated diameter. Learn the rig on a ₹31.86 votive or a ₹47.20 clear jar; decide in the jar you ship.
How much does a twenty-jar paired test cost?
₹3,686.80 of materials on the basket above — 20 Yankee 130 ML jars at ₹47.20, 2.5 kg of CSI 464 at ₹1,274.80, 250g of Lavender at ₹1,350 and 20 C1 wicks at ₹118 — plus ₹826 of instruments if you need the scale, thermometer and centring devices. But every one of those twenty candles is saleable if the batch passes, so the test is really a production batch with a split, a camera and a log. The genuine cost is a week of elapsed time and about an hour of recording.
Can I test two things at once to save time?
You can, and the result will be uninterpretable. If five jars are warmed and poured hot, five warmed and poured cool, five cold and hot, five cold and cool, you have four groups of five — too small to read — and any interaction between the two changes is hidden inside them. One variable, twenty jars, every time. The rig is reusable, so running four separate tests over four weekends costs you four mornings and gives you four clean answers instead of one muddle.
Build the rig once, answer the whole cluster
One pot. Twenty jars. Ten and ten, alternated. Five checkpoints. A hundred photographs. Graded blind.
Yankee Glass Jar 130 ML with Clear Cap ₹47.20 each, Clear Glass Votive Jar 70 gram ₹31.86 each, Luxury Soy Wax CSI 464 ₹507.40/kg flat to 10 kg with a published 80–90°C pour, Premium Coconut Soy Wax ₹920/kg with nothing published at all, Lavender Fragrance Oil 100 gm ₹540, Eco Candle Wicks C1 ₹5.90 each, Wick Centering Device ₹118 for five, Candle Making Weighing Scale ₹354, Pen Thermometer ₹354. Bulk pricing, GST invoicing and documentation on WhatsApp.
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Continue the read
- Testing preheating against production labour
- Should I preheat my jars if wet spots are a recurring problem?
- Can cold glass make wax solidify too quickly against the jar?
- Patchy adhesion only in winter: the three fixes in cost order
- How to compare two fragrance oils using a controlled burn test
- Why does my candle have wet spots?
- The ultimate guide to choosing glass jars for candle making
Editorial standards & sources
About this guide: Written by the CANDLEMAKINGSUPPLIESINDIA team. Product recommendations reflect the CSI range; the paired-batch design, the checkpoint schedule and the blind-grading rule apply to any supplier's materials.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: Jars — Yankee Glass Jar 130 ML with Clear Cap ₹47.20, page states "130 ML Yankee Glass Jar" with no dimensions and no hot-pour ceiling; Clear Glass Votive Jar 70 gram pack of 5 ₹159.30 and pack of 10 ₹318.60 (₹31.86 each), "Capacity: ~70g wax fill"; Clear Glass Jar with Golden Lid (150 gram) pack of 10 ₹944 and pack of 20 ₹1,888 (₹94.40 each), "150g fill capacity" and "Safe for hot pour up to 85°C". Wax — Luxury Soy Wax CSI 464 500 g ₹260, 1 kg ₹507.40, 5 kg ₹2,537, 10 kg ₹5,074, page states "Fragrance Load Up to 10%", "Melting Point 80°C – 90°C", "Pour Temperature 80°C – 90°C"; Premium Coconut Soy Wax 500 g ₹460, 1 kg ₹920, page states no load, no melting point, no pour temperature and nothing about appearance; Luxury Soy Wax Chunks 1 kg ₹599, add fragrance at 80–90°C, pour 70–80°C (75–80°C in its details table), 8–13% load with 10% recommended; Premium Coconut Soy CSI 468 1 kg ₹650, "Pour Temperature 58°C – 60°C"; Eco Soy CSI 400 1 kg ₹399, fragrance at 85°C with a two-minute stir, add temperature 80–90°C, no pour temperature stated. Fragrance — Lavender Fragrance Oil 15 gm ₹105.02, 50 gm ₹270, 100 gm ₹540, 500 gm ₹2,620, 1 kg ₹5,221. Wicks — Eco Candle Wicks Thin (C1) 10 Wicks ₹59, 20 Wicks ₹118, 50 ₹295, 100 ₹590, 500 ₹2,950, 1000 ₹5,900, all at ₹5.90 each. Tools — Wick Centering Device pack of 5 ₹118, Bamboo Wick Holder set of 5 ₹118, Steel Wick Holder pack of 5 ₹250, Candle Making Weighing Scale ₹354, Pen Thermometer ₹354. Assumptions labelled: the 120g fill for the Yankee 130 ML jar is this guide's assumption because that page states millilitres and not grams — weigh a filled jar; the 10% fragrance load is expressed as a percentage of total wax weight with the finished-candle equivalent shown (120g at 10% = 108g wax + 12g oil) and sits at CSI 464's stated ceiling; twenty jars × 108g = 2,160g of wax and twenty × 12g = 240g of oil; materials subtotal ₹944 + ₹1,274.80 + ₹1,350 + ₹118 = ₹3,686.80, with ₹172.70 of material per finished candle and ₹3,454 consumed across twenty, the balance being spare wax and oil that covers the usual 3–5% planning allowance for spills and top-ups; Premium Coconut Soy Wax at ₹920/kg gives ₹99.36 of wax in a 120g candle at a 10% load. The twenty-jar size, the ten-and-ten split, the five checkpoint times, the one-jar-is-noise rule and the whole temperature-cycle protocol are this guide's recommendations and the reader's own choices — there is no published standard for any of them, and no conversion exists between accelerated temperature cycling and real-world time. CSI publishes no glass thickness on any of its 78 container pages, no glass surface temperature, no glass-adhesion statement on any wax page and no acceptable cosmetic reject percentage; none is asserted here. Prices and availability change — the linked product pages are always authoritative.