My Large Three-Wick Candle Generates Too Much Heat After Several Hours — How Do I Redesign the Wick System Without Creating Tunnelling?

My Large Three-Wick Candle Generates Too Much Heat After Several Hours — How Do I Redesign the Wick System Without Creating Tunnelling?

 

Eco C2 ₹9.44 a wick (10-pack ₹94.40) Cotton Braided ₹12.00 a wick at every pack Wick stickers ₹100.00 for 40
Three wicks · too hot after several hours
Move the trio out first, then test a smaller trio and a pair: pool at the glass by burn two, and every bottom-third reading inside your limits.
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CSI Wick Diagnosis · Three-Wick Heat
Three flames share one pool, and after a few hours the heat adds up. Every fix that cools the bottom takes something from the edge, so move the wicks before you shrink them, and pass only what clears both gates.
37.70 cm²
pool area per wick for three wicks in a 12 cm-inside jar, about what one wick gets in a 7 cm jar · worked example
Quick answers — read this first
My large three-wick candle gets too hot after several hours. How do I redesign the wicks without making it tunnel? Treat it as two problems that have to be solved in the same candle: too much heat late (hours three and four, and the bottom third), and a pool that must still reach the glass in burns one and two. Every option is judged on both, never on heat alone.

What are the options? A smaller trio, the same trio moved further apart, two wicks instead of three, a shorter maximum burn on the label, or more wax around the pool. In a 12 cm-inside jar, three wicks each have 37.70 cm² of pool to melt, about the same as one wick in a 7 cm jar (38.48 cm²). Three large wicks for that is usually more fuel than the pool needs.

What do I test? Four arms, three candles each, burned to the end: your trio as now, the same trio moved out, a smaller C2 trio moved out, and a two-wick version. Gate 1: pool at the glass by burn two. Gate 2: bottom-third readings inside your own written limits.

What does it cost? If you hold Cotton Braided stock: an Eco C2 10-pack and one sheet of wick stickers, ₹194.40, plus 7 kg of wax (₹3,551.80). Moving your current wicks costs nothing.
The short answer
Why it heats late: three flames share one pool, heat each other's zones and warm the glass above a shrinking wax mass. Hour three of a session, low in the jar, is where that adds up.
Why fixes cause tunnelling: the edge of a wide jar is melted by the outer wicks. Make them smaller or remove one and the edge is the first place you lose.
The order: move the wicks out first (free); then a smaller trio, moved out; then two wicks. Each is a hypothesis for the same two-gate test.
Honest limit: CSI's tabbed rungs are C1, C2 and Cotton Braided, with nothing in between, so a "slightly smaller trio" is a whole rung. If C2 is too cool and Cotton Braided too hot, ask us before you buy.
Shop: Eco Candle Wicks C1/C2 · Cotton Braided Wicks Ready Made · Candle Wick Stickers · Luxury Soy Wax CSI 464 · all candle wicks
In this guide
Cooler at the bottom, still full at the top 12 cm-inside jar, 600 g, three wicks. Positions are our judgement, not CSI data. target: cooler late, pool still reaches the glass more risk of tunnelling or an edge ledge in burns 1–2 → more heat late → Cotton Braided trio, tight (now) Cotton Braided trio, moved out Cotton Braided pair C2 trio, moved out C2 pair C1 trio A shorter maximum session or more wax around the pool moves any point down a little, not left. Every option must pass two gates in the same candles session 1 session 2 session 3 session 4 session 5 session 6 session 7 Gate 1, sessions 1–2: pool reaches the glass all round by about hour 4 of burn 2 Gate 2, sessions 6–7: hourly glass and flame readings inside your own written limits Seven 4-hour sessions is the worked example (500 g burnable at 20 g/h). Fail either gate: the option fails.
Top: where each redesign tends to land between two failures, for a 600 g candle in a 12 cm-inside jar. Up is more heat late in the burn; right is more risk of a ledge at the glass early on. Your candle (black) has plenty of coverage and too much heat. Moving the same wicks out helps a little; a smaller trio moved out is the likeliest single change to land in the shaded zone; fewer or much smaller wicks run cooler but start to lose the edge. These positions are our judgement for the worked example, not CSI data. Bottom: the two gates every option must pass in the same candles.
Wicks · C2 ₹9.44 · C1 ₹5.90 a wick at every pack
Eco Candle Wicks: one C2 10-pack (₹94.40) is the smaller trio for three test candles
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Candle Wick Stickers: fix every wick on its mark so a spacing test measures spacing, not drift
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Trio too hot, pair too cool? Tell us your jar and wicks. We'll say honestly what we stock between them, and what we don't.
Straight answer
My large three-wick candle generates too much heat after several hours. How do I redesign the wick system without creating tunnelling?
Change the system in the order that costs least, and judge every version against two gates in the same candles. The heat comes from three flames working on one pool: each wick heats its neighbours' wax as well as its own, the centre between them gets the most heat, and as the session runs on and the wax level falls, more of that heat goes into the glass. The tunnelling risk comes from the edge: in a wide jar only the outer side of each flame reaches the wall, so anything that weakens or removes a wick costs you coverage there first. So: first, move the wicks outwards (in our worked example from 2.0 cm to 3.0 cm from the centre), which spreads the same heat over more of the pool and costs nothing. Second, a smaller trio, moved out: at CSI that is Cotton Braided → C2, a full rung, because there is no tabbed size between them. Third, two wicks placed on a diameter about the inside radius apart. Burn three candles of each to the end, in 4-hour sessions, and approve an option only if the pool reaches the glass by burn two and every reading in the bottom third stays inside the limits you wrote before burn one.
One line: move the trio out (free), then test a smaller trio moved out and a two-wick version beside it, three candles each to the end; pass only what clears both the edge at burn two and the heat at the bottom.
The redesign test, priced: an Eco C2 10-pack (₹94.40) for the smaller trio and a sheet of 40 Candle Wick Stickers (₹100.00) to hold all 33 wicks on their marks: ₹194.40. Your Cotton Braided stock covers the control, the moved-out trio and the pair; if not, three 10-packs are ₹360.00. All in stock on 7 October 2026, except the 100-sticker sheet.
Eco C2 10-pack — ₹94.40

Your candle, described precisely

"Too much heat after several hours" is two facts: when it happens, and where.

Your symptom, stated exactly: a large container candle with three wicks lights well. For the first hour or two the three flames look calm and the pool joins up. Then, after several hours of one session, the glass gets far hotter than you are comfortable with (measured with your own non-contact thermometer, not your hand), the flames may lean in or grow, and the pool gets deep. It is usually worse in later burns, lower in the jar. You know the obvious fix, smaller or fewer wicks, and you've probably seen what it does: wax left clinging to the glass, a candle that tunnels.

We'll work with one labelled example throughout. Your jar is your own: a 12.0 cm inside diameter container (CSI lists no 12 cm jar; our widest listings are the Apothecary Glass Candle Jar at about 10 cm across the rim and an 11 × 11 × 10 cm clip-top container). The candle is 600 g at 8% = 48 g fragrance + 552 g wax, load as a percentage of total weight. The wicks are three Cotton Braided Wicks Ready Made set in a tight triangle 2.0 cm from the centre, because their page describes them as "engineered for large-diameter candles exceeding 8 cm". If your trio is C2, read every step one rung down.

Note which hour the heat arrives, which burn, and where on the glass it is hottest. If the trio was aggressive from the very first burn, that is three wicks burning aggressively from the start. This post is about heat that builds with time.

Safety first, plainly: a large candle with three flames holds a lot of hot liquid wax, and three flames close to glass is a safety question before it is a quality one. Stop any session where a flame leans onto the glass, the flames merge into one, the candle smokes continuously, or your glass reading passes the limit you set; let it cool where it stands, and don't move a candle with a full pool. Never judge glass heat by touch. CSI lists no non-contact thermometer, so use one of your own at marked points. The "Safe for hot-pour up to 85°C" wording on some CSI jar pages is a pour figure, not a burn rating, and we give no glass-temperature limit; you set yours (how to measure container temperature consistently).

Why three wicks pile up heat after several hours

One wick heats its own pool. Three wicks heat each other's.

Three wicks in a wide jar start as three small pools that grow and merge. Once joined, each flame sits in a pool the other two are also heating, so the wax round every wick is hotter than that wick alone would make it. That is why multi-wick candles often look perfect in hour one and very different by hour three.

Four things make it worse as a session runs and the candle burns down. The centre gets heat from all three; the tighter the triangle, the hotter and deeper it gets. The shrinking wax mass: lower in the jar there is less wax to soak up heat and more glass above the pool. Flame interaction: close flames draw air towards each other, lean in, lengthen and can merge. Session length: it is cumulative, so hour four is hotter than hour one. The general version of the mechanism, for any wick, is why a wick that looks correct at the top becomes too aggressive lower down; the multi-wick, half-way-down version from the jar-diameter series is multi-wick perfect for the first half, extremely hot near the bottom.

Now the edge. In a wide jar the wax against the glass is melted mainly by the outer side of the nearest flame. With three wicks 2.0 cm from the centre, each wick is 4.0 cm from the wall and only 3.46 cm from its neighbours: lots of overlapping heat in the middle, and the edge reached by heat that has to travel 4.0 cm. That is the trap. The tight triangle is hot in the centre and only just adequate at the edge, so reducing the wicks without moving them takes away edge melting first.

The geometry for a 12 cm-inside jar · worked example
Area = π r² on the inside radius; trio wick-to-wall = r − ρ, wick-to-wick = ρ√3 (ρ = distance from centre); pair on a diameter: wick-to-wall = r − s/2 · geometry ranks options, it doesn't predict the burn
Layout Pool area per wick Wick to wall Wick to wick What it tends to do
Trio, tight (ρ = 2.0 cm), your candle now 37.70 cm² 4.0 cm 3.46 cm Hot centre, deep middle pool, edge reached last
Trio, moved out (ρ = 3.0 cm, half the radius) 37.70 cm² 3.0 cm 5.20 cm Same fuel spread wider; cooler centre; edge reached sooner
Pair on a diameter, 6.0 cm apart 56.55 cm² 3.0 cm 6.0 cm Less fuel; two points of the edge furthest from both flames
For scale: one wick, 7 cm-inside jar 38.48 cm² 3.5 cm — A pool one C1 or C2 commonly covers (test)
For scale: one wick, 8 cm-inside jar 50.27 cm² 4.0 cm — Where the Cotton Braided page's "exceeding 8 cm" begins

Read the first column. Three wicks in your jar each have 37.70 cm² to melt, 98% of what one wick has in a 7 cm jar. Three wicks the size CSI's own page positions for jars over 8 cm are, on this arithmetic, sized for more pool than each of them gets. It doesn't prove anything, and burns decide, but it explains why the heat appears once the pools merge, and why a smaller trio is a reasonable thing to test. The positioning question for an even pool is positioning three wicks in a 12 cm jar; we don't repeat it here.

Hot after hours: the causes, ranked

Two causes are how it's burned. The rest are how it's made, and only one of them is wick size.

The ranking is our judgement for a three-wick candle that is fine early in a session and too hot after several hours. Signs are common observations, not CSI test data; CSI publishes no flame, soot or glass data for any wick.

Cause ranking · three wicks, too hot after several hours
Burning = how the candle is used · making = formula, layout and production · ₹ from CSI live pricing, 7 October 2026
Cause What you'd see Discriminating test Fix Cost
1. Wicks set too close (making: layout) Hottest and deepest in the centre; flames lean inwards; glass evenly warm rather than hot opposite one wick Same wicks moved out to half the radius, beside your current layout Re-space with a template and stickers ₹100.00 for 40 stickers
2. Trio too strong for the pool (making: wick size) Pool joins fast, then deepens past about 1–1.5 cm (rule of thumb); heat rises every hour; fast wax loss Smaller trio moved out against the moved-out current trio; weigh g/h One CSI rung smaller ₹94.40 (C2 10-pack)
3. Sessions longer than the label (burning) Fine at 3 hours, hot only at 4–5 hours or longer Your session log: hours at the first high reading Test and label one session length Nothing
4. Draught or a fan (burning) One side hotter, flames leaning one way, soot on one side Repeat in still air, fans and AC off Burn location; care wording Nothing
5. Wicks not trimmed or drifting (burning / production) One flame larger; one wick off its mark after pouring Measure each wick's exposed length and position before lighting Trim to 5–6 mm; stick tabs on marks Nothing, or stickers
6. Heavy oil, high load or dye (making: formula) Mushrooms and soot late; worse in one fragrance or colour on the same layout Same layout with a lighter oil or unscented A per-fragrance layout, or a lower load within both ceilings Your own test

Causes 1 and 2 overlap; the test below separates them. If moving the same wicks out brings the bottom-third readings inside your limits, size was never the problem. Cause 3 matters more with several flames: maximum burn duration for multi-wick candles. Cause 4 is common under Indian ceiling fans (the ceiling-fan post). Cause 6 is a tendency, not CSI data: heavier oils and higher loads commonly build more carbon, and three wicks means three times the carbon.

Five redesign options, and what each risks at the edge

Every option that cools the bottom takes something from the edge. The question is how much.

These are the five levers the brief for this problem allows: smaller, wider, fewer, shorter, more wax. They are not alternatives to testing; each is a hypothesis for the same two-gate test. The table puts them side by side, in the order we'd try them.

Five options · heat, edge risk and cost per candle
Our judgement for the worked example · wick ₹ per candle from CSI live pricing, 7 October 2026 · costs exclude labour, freight, packaging and GST
Option What changes Late heat Edge risk (burns 1–2) Wicks per candle
A. Move the trio out ρ 2.0 → 3.0 cm; wall 4.0 → 3.0 cm Somewhat lower: less overlap in the centre Lower: flames closer to the edge ₹36.00 (unchanged)
B. Smaller trio, moved out Cotton Braided → C2, at ρ 3.0 cm Lower: less fuel per flame Moderate; spacing protects the edge ₹28.32
C. Two wicks Cotton Braided pair, 6.0 cm apart (C2 pair as contingency) Lower: one flame fewer Higher: two arcs of edge far from both flames ₹24.00 (C2 pair ₹18.88)
D. Shorter maximum burn Label 4 h → 3 h, tested at 3 h Lower per session; the bottom still arrives Higher if 3 h is too short to reach the glass ₹36.00 (unchanged)
E. More wax around the pool A wider or heavier jar for the same wicks Slightly lower; delays the hot zone Higher: more edge to melt A new jar, a new test

A. Move the trio out: the free test, always first

Moving each wick from 2.0 cm to 3.0 cm from the centre takes the wick-to-wall distance from 4.0 cm to 3.0 cm and opens the wick-to-wick distance from 3.46 cm to 5.20 cm. Same wicks, same fuel, less overlap in the centre and more heat delivered to the edge. Half the inside radius is a starting point for testing (our judgement), not a rule. Argued against our own interest: this arm uses wicks you already own. If it passes, you buy nothing from us but a sheet of stickers.

B. A smaller trio, moved out: the likeliest single change

Keep three flames (customers expect them), cut the fuel per flame, and let the spacing protect the edge. From Cotton Braided, "smaller" at CSI is Eco C2: a whole rung, not a nudge. Wick cost falls from ₹36.00 to ₹28.32 a candle (₹7.68 less), a side effect, never the reason. If the C2 trio clears the heat but leaves a ledge, try more spacing or a pair, not a size we don't sell.

C. Two wicks: fewer flames, more edge to cover

Two wicks 6.0 cm apart sit 3.0 cm from the wall on their own side, but the two arcs of glass at right angles to the line between them are furthest from both flames: the classic place for a ledge. Each wick has 56.55 cm² to melt, so a pair usually needs larger wicks than a trio; hence a Cotton Braided pair, with a C2 pair as contingency. Two versus three in principle is two or three wicks for a 12 cm luxury candle; a pair that overheats later is the double-wick post.

D. A shorter maximum burn: a label change that must be tested

If readings only cross your limit in hour four, a 3-hour maximum can be part of the design, but only if the whole full-life test runs at 3-hour sessions and gate 1 still passes (a wide candle may not reach its edge in three hours). Customers burn longer than labels say, so keep margin. It is one option among five, never the first.

E. More wax mass: the weakest lever

A taller fill delays the hot zone, but the bottom of a taller candle is still a bottom. A wider jar lowers heat per area and adds edge to melt. Either is a jar change with its own tests (why the final third matters for a new glass container).

Don't do this. Don't swap to smaller wicks in the same tight triangle: you cut the fuel and leave the edge as far away as ever, which is the shortest route to the tunnelling you were worried about. Don't take out the middle wick of a line of three and call it a pair; the spacing is now wrong for two. Don't hide a hot trio behind "trim all three wicks every hour": customers trim once, if at all. Don't change size and spacing and fragrance at once; you won't know which one worked. And don't order 500 wicks on the strength of one cool session at the top of the jar.

The two-gate test: four arms, three candles each

A cooler candle that tunnels has failed. So has a full pool that cooks the glass.

Four arms, poured the same day from one wax lot and one oil lot into the same jars: A your Cotton Braided trio as now (control); B the same trio moved out; C an Eco C2 trio moved out; D a Cotton Braided pair. Three candles each, 12 in total. Arm A is not wasted: it re-creates the original heat under today's conditions, so the others are compared with a measurement, not a memory. Worked example, labelled: at about 20 g an hour for the trio, the 500 g above a 100 g floor (about 1 cm, a common rule of thumb) is about 25.0 hours, so roughly 7 four-hour sessions per candle. Smaller arms burn more slowly, so weigh your own.

1
Draw the layouts and fix every wickCut a paper circle the size of the jar base, mark the triangle at 2.0 cm (arm A) or 3.0 cm (arms B and C) from the centre and the pair at 6.0 cm apart (arm D), mark the base through it, and stick each tab on its mark. Hold the wick tops straight with skewers or card across the rim while the wax sets. 33 wicks in all.
2
Pour and cure identically600 g each at 8%: 576 g of your oil and 6,624 g of wax for twelve candles. Pour within your wax page's stated range (Luxury Soy Wax CSI 464: 80°C–90°C, and no hotter than any figure on your jar's page). Cure together: several CSI oil pages state 48–72 hours for soy; 3 days here.
3
Write the limits before anything is litYour own glass limit at fixed points (between two wicks, opposite each wick, and low on the wall), flame band (2.5–5 cm is a common rule of thumb), pool depth (about 1–1.5 cm), no merging or leaning flames, and the session length you will print on the label.
4
Gate 1, sessions 1 and 2: the edgePhotograph the pool every hour from above. Record whether it reaches the glass all round and how wide any ledge is. An arm that still has a ledge at the end of burn two is marked, and fails if it hasn't caught up by burn three.
5
Middle sessions: weigh and watch the trendTrim all wicks to 5–6 mm before each session, fans and AC off, room temperature logged. Weigh before and after. Read glass and flames at hours 2 and 4.
6
Gate 2, the bottom third: hourlyOnce a candle is in its bottom third, read glass at every marked point, flame height and pool depth every hour. Stop any session that crosses a limit and record it as a fail. Stop each candle at the floor and record where every flame finished.
The log sheet · per candle, per session
Limits are an in-house protocol you set before burn one, not industry standards · the bands are rules of thumb
Measure How When Suggested starting limit (yours to set)
Edge Photo from above; ledge width with a ruler Hourly, sessions 1–3 No ledge at the end of burn 2, or gone by burn 3
Glass Your non-contact thermometer, same marked points Hours 2 and 4; hourly in the bottom third Below your own written limit at every point
Flames Ruler behind, photo level As glass Inside your band; no leaning in, no merging
Pool depth Skewer midway between centre and wall End of each session No deeper than about 1.5 cm
Grams per hour Weigh before and after Each session Steady; a jump in the bottom third is a warning
End of life Ruler, photo Last session All flames finish clear of the base, about 1 cm of wax left
The approval rule (ours, labelled)
An arm is approved when all three candles pass gate 1 (pool at the glass by the end of burn two, or a ledge gone by burn three) and gate 2 (every bottom-third reading inside the limits you wrote), at the session length printed on the label, in still air. One failing session in any candle fails the arm. If two arms pass, choose the one with more margin at the bottom, not the one that melted the edge fastest. An in-house protocol, not an industry standard; the section-by-section sheet is evaluating top, middle and bottom separately.
Test materials and ₹ · 12 candles × 600 g at 8%
CSI live pricing, 7 October 2026, in stock · your own oil and jars · excludes labour, freight, packaging and GST
Item Need Buy ₹
Wax: Luxury Soy Wax CSI 464 (or your own) 6,624 g (12 × 552 g) 5 kg + 2 × 1 kg (376 g spare) ₹3,551.80
Fragrance: your oil 576 g (12 × 48 g) From stock your own
Arm C: Eco C2 9 wicks C2 10-pack (1 spare) ₹94.40
Arms A, B, D: Cotton Braided 24 wicks From stock, or 3 × 10-pack (6 spare) ₹360.00 if bought
Wick stickers 33 One 40-sheet (7 spare) ₹100.00
Total with Cotton Braided in stock C2 10 + stickers + 7 kg wax ₹3,746.20
Total buying Cotton Braided too + 3 × 10 Cotton Braided ₹4,106.20

Three 10-packs of Cotton Braided (₹360.00) beat the 50-pack (₹600.00): same price per wick, and you need 24. Two 1 kg packs with the 5 kg (₹3,551.80) beat 5 kg + 1 kg + two 500 g (₹3,564.40). If arm C runs hot too, the contingency arms are a C1 trio and a C2 pair: ₹212.40 for a C1 20-pack and a C2 10-pack. Related: the double-wick candle that becomes dangerously hot near the bottom and what to revalidate after moving from one wick to two.

The CSI buy list and the step to production

Our range is short. With three wicks in a jar, that matters three times over.

CSI's sized, tabbed wicks are three rungs, C1 → C2 → Cotton Braided, with no sized, tabbed wick between C1 and C2 or between C2 and Cotton Braided, none smaller than C1, and one wooden-wick listing with no widths. So a smaller trio from Cotton Braided is a C2 trio, and the step after that is a C1 trio. The braided rolls (Eco Braided Wicks by the metre, the Braided Wick Roll with 100 tabs) are cut-to-length constructions, not half-sizes. If the C2 trio clears the heat but loses the edge, and the Cotton Braided trio holds the edge but cooks the glass, you are between rungs we don't sell: spacing, a pair, the fragrance load (within both ceilings) or a jar change are your levers, or ask us on WhatsApp and we'll say plainly what we have.

Buy list for the redesign test · smallest in-stock pack
Per-wick ₹ = pack price ÷ wicks · flat per wick at every pack · Eco C1 10-pack and the 100-sticker sheet out of stock on 7 October 2026
Your trio now Arms to buy for Pack and price Per wick Left after the test
Cotton Braided C2 trio moved out C2 10 ₹94.40 + stickers 40 ₹100.00 = ₹194.40 ₹9.44 1 C2, 7 stickers
Cotton Braided, no stock left All four arms + CB 3 × 10 ₹360.00 = ₹554.40 ₹12.00 / ₹9.44 6 CB, 1 C2
Eco C2 C1 trio moved out; C2 pair C1 20 ₹118.00 + stickers ₹100.00 ₹5.90 11 C1
Eco C1 Nothing smaller Spacing, a pair, the formula or the label; ask us — —
Performance Wooden No narrower width listed C2 or Cotton Braided arms; ask us — —

Argued against our own interest: if arm B (your own wicks, moved out) passes both gates, you need nothing from this list except stickers. And because C1, C2 and Cotton Braided cost the same per wick at every pack, buying more now buys you stock, not savings.

The step to production quantity

Only after three full-life candles of the chosen arm pass both gates. Wicks = candles × wicks per candle × (1 + a defect allowance). Worked example, labelled: 100 three-wick candles a month plus 2% is 306 wicks. If the C2 trio passes, buy 3 × 100 + 10 = 310 for ₹2,926.40; a 500-pack is the same ₹9.44 a wick and ties up ₹1,793.60 more cash. If the Cotton Braided pair passes, 204 wicks round to 210 for ₹2,520.00, against ₹3,720.00 for 310 Cotton Braided at today's trio. Stickers: 8 sheets of 40 a month (₹800.00) at this volume. Reorder point = daily use × your lead time + safety stock; CSI publishes no lead times, so ask on WhatsApp. A new wick lot, a new jar batch or a new fragrance in the same layout is a change: re-test it.

Diwali is 8 November 2026, 32 days from 7 October 2026. A 3-day cure and seven daily 4-hour sessions take about 10 days, so a test poured this week finishes before festive production. Large three-wick candles are a common gifting format: send us your approved layout and wick count on WhatsApp for stock, dispatch and a GST invoice.
WhatsApp a festive order

What to buy, and what to skip

Five items, chosen on page statements, price and stock on 7 October 2026. CSI publishes no flame, soot or heat data, so nothing is ranked on performance, and one card is here to tell you not to buy it.

1
wick · pre-tabbed · the smaller trio
Eco Candle Wicks — Thick (C2) and Thin (C1)
The redesign arm most likely to pass both gates in a 12 cm jar is three C2 wicks moved outwards: smaller than Cotton Braided, spaced to cover the edge. One C2 10-pack (₹94.40) holds the nine wicks for three candles. If the C2 trio still runs hot, the next CSI step down is a C1 trio; there is no sized, tabbed wick between C1 and C2, or between C2 and Cotton Braided. The page states no length, width or jar range in the text we captured and claims "minimal soot or smoke" (the page's claim, not a measurement). C2 is ₹9.44 and C1 ₹5.90 a wick at every pack. Argued against our own interest: nine wicks is all the test needs; the 100-pack is a production purchase.
Pack Price Per wick Use
Thin (C1) / 10 ₹59.00 ₹5.90 Out of stock on 7 October 2026
Thin (C1) / 20 ₹118.00 ₹5.90 contingency C1 trio: 9 used, 11 spare
Thin (C1) / 50 ₹295.00 ₹5.90 same per wick
Thin (C1) / 100 ₹590.00 ₹5.90 same per wick
Thin (C1) / 500 ₹2,950.00 ₹5.90 same per wick
Thin (C1) / 1,000 ₹5,900.00 ₹5.90 same per wick
Thick (C2) / 10 ₹94.40 ₹9.44 the C2-trio arm: 9 used, 1 spare
Thick (C2) / 20 ₹188.80 ₹9.44 same per wick
Thick (C2) / 50 ₹472.00 ₹9.44 same per wick
Thick (C2) / 100 ₹944.00 ₹9.44 production if the C2 trio passes
Thick (C2) / 500 ₹4,720.00 ₹9.44 same per wick
Thick (C2) / 1,000 ₹9,440.00 ₹9.44 same per wick
The C2-trio arm: one 10-pack, ₹94.40. Buy C2 10 — ₹94.40
2
wick · pre-tabbed · the current trio and the pair
Cotton Braided Wicks Ready Made
The page says these are "engineered for large-diameter candles exceeding 8 cm" and gives "Height of the wick is 10.16 cm"; "preventing tunneling" is the page's claim. That makes it a natural first choice for a 12 cm jar, and three of them is a lot of wick for one pool: the heat you are fighting. In this test it is the control (the trio as now), the moved-out trio and the pair. Flat ₹12.00 a wick at every pack, so three 10-packs (₹360.00) cover 24 wicks for the same unit price as the 50-pack. Limitation: it is CSI's largest tabbed rung; there is nothing bigger, and its page states no width.
Pack Price Per wick Use
Pack of 10 ₹120.00 ₹12.00 three packs cover the control, moved-out and pair arms (24 wicks)
Pack of 50 ₹600.00 ₹12.00 ₹600.00: 26 more wicks than the test needs
Pack of 100 ₹1,200.00 ₹12.00 production if the pair passes
Pack of 500 ₹6,000.00 ₹12.00 same per wick
Pack of 1,000 ₹12,000.00 ₹12.00 same per wick
₹12.00 a wick at every pack. Buy 10 — ₹120.00
3
accessory · fixes the layout · centring
Candle Wick Stickers (40)
A spacing test only works if every wick sits exactly where you drew it, three times per candle. Stick each tab to a mark on the jar base made from a paper template with the triangle on it. The page describes "10mm Candle Wick Round Stickers"; one 40-sheet covers the 33 wicks in this test. The 100-sticker sheet is out of stock on 7 October 2026. The Large Candle Wick Stickers listing (₹249.00) mentions 2 mm, 20 mm and 10 mm in its title and text, so check on WhatsApp before you rely on its size. Limitation: a sticker holds the tab, not the top of the wick; use your own skewers or card across the rim while the wax sets.
Listing Price Per sticker Use
1 sheet, 40 stickers (10 mm) ₹100.00 ₹2.50 the test: 33 wicks, 7 spare
1 sheet, 100 stickers ₹236.00 ₹2.36 Out of stock on 7 October 2026
Large Candle Wick Stickers, 40 ₹249.00 ₹6.22 listing gives 2 mm, 20 mm and 10 mm: check before buying
One sheet, ₹100.00, for 33 wicks. Buy 40 — ₹100.00
4
wax · the test base
Luxury Soy Wax CSI 464 (flakes)
Twelve 600 g candles at 8% need 6,624 g of wax: 5 kg + 2 × 1 kg (₹3,551.80) leaves 376 g. The page states a pour temperature of 80°C–90°C and a fragrance load "up to 10%"; 8% sits inside it, and that ceiling is a formulation limit, not a regulatory one. One wax lot for all four arms. Argued against our own interest: CSI 464 is flat per gram from 1 kg to 10 kg, so the 10 kg (₹5,074.00) saves nothing per gram and leaves over 3 kg idle until the test is done. If your candle uses another wax, test in that wax.
Pack Price Per gram Use
500 g ₹260.00 ₹0.52 tops up only
1 kg ₹507.40 ₹0.51 two of these + 5 kg = 7 kg
5 kg ₹2,537.00 ₹0.51 same per gram as 1 kg
10 kg ₹5,074.00 ₹0.51 production, after approval
Test wax: ₹3,551.80 for 7 kg. Buy 5 kg — ₹2,537.00
5
accessory · read before buying · holder
Steel Wick Holder (Set of 5)
Included so you know why we don't recommend it here. The page says "3-hole layout fits single, double, or triple wick setups" and "Fits most jar diameters (up to 9 cm wide)". Three holes across a bar hold wicks in a line, not a triangle, and the page states no hole spacing. For a 12 cm triangle layout it is the wrong tool. Where it helps: a pair in a jar up to 9 cm, once you have measured the holes.
Pack Price Each Note
Pack of 5 ₹250.00 ₹50.00 jars up to 9 cm (page)
Pack of 10 ₹500.00 ₹50.00 same per holder
Pack of 25 ₹1,250.00 ₹50.00 same per holder
Not for a 12 cm triangle layout. See the holder — ₹250.00

Skip for now: any 100-, 500- or 1,000-pack before an arm passes; the Steel Wick Holder for this jar (up to 9 cm and three holes in a line, per its page); wooden wicks as a "smaller" option (one width, a different system that needs its own test); and the 10 kg wax for the test.

The CSI principle
Cool the bottom without losing the edge, and prove both in the same candles.
Move the trio out first, then a smaller trio moved out and a pair beside it, three candles each, to the floor. New wicks for the test: ₹194.40.
"With three wicks, spacing is a wick size you already own. Test it before you buy a smaller one."
— CandleMakingSuppliesIndia
Why trust this guide

CandleMakingSuppliesIndia sells the wicks, wax and accessories named here, not finished candles. This page still tells you to move your own wicks before buying ours, that our bigger wick packs save nothing per wick, that our tabbed range has no sizes between C1, C2 and Cotton Braided, and that our Steel Wick Holder is the wrong tool for this jar.

Every CSI price was checked on the live store on 7 October 2026, with stock checked per pack: the Eco C1 10-pack and the 100-sticker sheet are out of stock and are not offered. Page wording is quoted and attributed, including the Cotton Braided page's "exceeding 8 cm" and the Steel Wick Holder's "up to 9 cm wide".

The 12 cm-inside jar, 600 g fill, 20 g/h, 100 g floor, wick positions, 100 candles a month and 2% allowance are labelled worked examples; the trade-off positions and the half-radius starting point are our judgement; the geometry is arithmetic, not a burn prediction. The flame band, pool depth, trim and floor are common rules of thumb. For bulk pricing, GST invoicing, and MSDS and IFRA documentation on request, message us on WhatsApp at +91 7397976926.

Frequently asked questions

Why does my three-wick candle get so hot after a few hours?
Once the three pools merge, every flame heats wax the others are heating too, the centre gets the most, and lower in the jar there's less wax and more glass to take the heat. Tight spacing and oversized wicks make it worse.
Should I use smaller wicks or move them further apart?
Move them first: it costs nothing and protects the edge. If the moved-out trio still runs hot, test a smaller trio in the moved-out layout. Smaller wicks in the same tight layout is the usual route to tunnelling.
How far apart should three wicks be in a 12 cm jar?
There is no fixed answer. As a starting point to test, many makers set the wicks around half the inside radius from the centre: in a 12 cm-inside jar that puts them 3.0 cm from the wall and 5.20 cm apart. Your burns decide.
Will two wicks tunnel in a wide jar?
They can: the two arcs of glass at right angles to the line between the wicks are furthest from both flames. A pair usually needs larger wicks than a trio, so test it beside the trio, three candles each, to the end.
What wick is smaller than Cotton Braided at CSI?
Eco C2, then Eco C1. There is no sized, tabbed wick between them. C2 is ₹9.44 a wick (10-pack ₹94.40); C1 is ₹5.90 (20-pack ₹118.00; the 10-pack is out of stock on 7 October 2026).
Can I just tell customers to burn my three-wick candle for less time?
Only if the whole full-life test passes at that shorter session, including the pool reaching the glass. A shorter label limit hiding a design that fails at four hours is not a fix: customers burn longer than labels say.
Three wicks, too hot after hours
Move the trio out, then test a smaller trio and a pair beside it, three candles each, to the floor.
New wicks and stickers for the test: ₹194.40, with 7 kg of wax ₹3,746.20 in all. If no CSI rung fits your jar, tell us on WhatsApp; we'll say plainly what we stock, and what we don't.
Shop Eco Candle Wicks C1 / C2 Check stock on WhatsApp
Continue the read — multi-wick heat and full-life testing
Editorial standards & sources
About this guide: part of CSI's cluster on late-burn heat, end of life and full-life testing (6961–6980). It covers redesigning a large three-wick candle that runs too hot after several hours without creating tunnelling: the multi-wick heat mechanism, trio and pair geometry, six causes ranked, five redesign options, a four-arm two-gate full-life test with an approval rule, a CSI buy list and the production step.

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 — Bamboo Wick Holder, Eco Candle Wicks, Luxury Soy Wax CSI 464 (Flakes Form) For Container Candles, Luxury Soy Wax Chunks for Jar / Container Candles. They are general product reviews, not assessments of the burn and wick advice on this page. Names, star ratings, dates and products are as recorded by Judge.me and wording is unedited. "Verified buyer" appears only on reviews Judge.me recorded as verified — Subhankar Roy, Monika Deep, Thenirvaofficial, Sakshi Jain. The reviews from Ashwini, Lalitha Jagan are published but not recorded as verified, and carry no badge. Reviews below five stars are included as published, not filtered out.

Figures verified 7 October 2026, CSI live pricing: Eco Candle Wicks Thin (C1) 10 ₹59.00 (out of stock), 20 ₹118.00, 50 ₹295.00, 100 ₹590.00, 500 ₹2,950.00, 1,000 ₹5,900.00 (₹5.90 a wick); Thick (C2) 10 ₹94.40, 20 ₹188.80, 50 ₹472.00, 100 ₹944.00, 500 ₹4,720.00, 1,000 ₹9,440.00 (₹9.44 a wick); Cotton Braided Wicks Ready Made 10 ₹120.00, 50 ₹600.00, 100 ₹1,200.00, 500 ₹6,000.00, 1,000 ₹12,000.00 (₹12.00 a wick); Candle Wick Stickers 40 ₹100.00, 100 ₹236.00 (out of stock); Large Candle Wick Stickers 40 ₹249.00; Steel Wick Holder Pack of 5 ₹250.00, 10 ₹500.00, 25 ₹1,250.00; Luxury Soy Wax CSI 464 500 g ₹260.00, 1 kg ₹507.40, 5 kg ₹2,537.00, 10 kg ₹5,074.00. Every item priced here is in stock on 7 October 2026 except where marked. Per unit = price ÷ units, two decimals. CSI lists no non-contact thermometer and no 12 cm jar.

Non-price figures: "large three-wick candle" and "too much heat after several hours" are the reader's words (title). The 12 cm inside diameter, 600 g fill at 8% (48 g oil + 552 g wax, load as a percentage of total weight), Cotton Braided trio, wick positions (2.0 cm and 3.0 cm from the centre, a pair 6.0 cm apart), 20 g/h, 100 g floor, 100 candles a month and 2% allowance are labelled worked examples. Pool areas use π r² on the inside radius (113.10 cm² for 12 cm). Trade-off positions in the diagram are judgement. Wax ceiling as the page states (CSI 464 up to 10%), a formulation limit. The flame band (2.5–5 cm), pool depth (about 1–1.5 cm), 5–6 mm trim and 1 cm floor are common rules of thumb. No glass-temperature limit is given or implied. Costs exclude labour, freight, packaging and GST. Diwali 8 November 2026 is a calendar fact.
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