My Smaller Wick Fixes Soot but Reduces the Melt Pool Slightly — How Do I Determine Whether the New Performance Is Still Commercially Acceptable?
शेयर करना
How small is "slightly smaller"? Measure area, not width. In the worked 7.5 cm jar, a pool 88% as wide as the jar is only 77.4% of its surface. That is fine on burn 1 if it reaches the glass by burn 2–3; it isn't fine if it never does.
How do I test it? Five C1 candles: three in 4-hour sessions and two in 2-hour sessions, the way many customers actually burn. Log the pool at hour 4 of every session, weigh each spent candle, and apply your rule.
What does it cost? A C1 20-pack and 1 kg of CSI 464: ₹625.40, with your own oil and jars.
- Straight answer: acceptable if it passes three written criteria
- Your situation, made precise
- Why "slightly smaller" is bigger than it looks
- Why the pool is smaller: causes, ranked
- The acceptance criteria, written down
- The replicate test: five candles, two burn habits
- The decision, and the step to production
- What to buy, and what to skip
- Frequently asked questions
Your situation, made precise
The worked example, labelled: a 150 g candle at 8% (12 g of fragrance and 138 g of wax, load as a percentage of total weight) in your own jar, measured at 7.5 cm inside. On Eco C2 it reached the glass early and sooted by hour three. On Eco C1 it burns cleanly, but at the end of the first 4-hour burn the pool is 6.6 cm across, leaving about 4.5 mm of solid wax at the glass all round; on burn 2 it reaches 7.2 cm. You're asking whether that is a defect or a fair price for a clean flame.
This post owns the acceptance criteria, the replicate test and the decision. How a candidate that tunnels slightly compares with one that mushrooms slightly is 6959; the matching question about scent strength is 6989. The published post on the same trade-off after a supplier change is a replacement wick that burns cleaner with a slightly smaller pool; here the change is one rung down within CSI's own range.
Why "slightly smaller" is bigger than it looks
A melt pool is a circle, and circles punish small shortfalls. The surface that releases fragrance and the wax the wick is using both scale with area, π × r², on the inside diameter. In the worked example the glass is 7.5 cm inside, so the full pool is 44.18 cm². A burn-1 pool of 6.6 cm is 88% of the width but 34.21 cm², only 77.4% of the area. At 7.2 cm on burn 2 it's 40.72 cm², 92.2%.
| Burn | Pool across | Share of width | Pool area | Share of area | Ring per side |
|---|---|---|---|---|---|
| 1 | 6.6 cm | 88% | 34.21 cm² | 77.4% | 4.5 mm |
| 2 | 7.2 cm | 96% | 40.72 cm² | 92.2% | 1.5 mm |
| 3 | 7.5 cm | 100% | 44.18 cm² | 100% | none |
That's why "it's only a few millimetres" is the wrong frame, and why the criterion is about when the pool reaches the glass and whether it stays there, not how close it gets. A common rule of thumb is about one hour of burning per 2.5 cm of diameter for a full pool (about 3.0 hours for this jar; very rough). A wick that's a little under that pace on burn 1 but reaches the glass by burn 2–3 usually leaves no lasting ring; one that never quite gets there builds a wall of wax that the next burns can't reach, which is tunnelling. The early-ring question in published form: accepting a thin ring during early burns and tunnels on burn 1 but catches up later.
Why the pool is smaller: causes, ranked
The ranking is our judgement for "smaller wick, clean flame, pool short of the glass on early burns". Signs are common observations, not CSI burn data.
| Cause | What you'd see | Discriminating test | Fix | Cost |
|---|---|---|---|---|
| 1. Less wick power (making: wick, expected) | Even ring all round on burn 1, shrinking on burn 2, gone by 3; flame calm, no soot | Pool width at hour 4 of burns 1–3 on three candles | Accept if it meets the criteria; otherwise a C1 pair or the formula | ₹118.00 (C1 20-pack) |
| 2. Short sessions (burning: habit) | A ring that persists when sessions are 1–2 hours, absent at 4 hours | Two candles in 2-hour sessions beside 4-hour ones | First-burn advice on the label, or a stronger configuration | Stickers from ₹0.83 each |
| 3. Off-centre or leaning wick (making: production) | Ring thick on one side, pool touching the glass on the other | Tab position in the spent jar | Centre and hold while setting | ₹118.00 for five holders |
| 4. Draught or a cold room (burning: environment) | One-sided pool on fan days; slower pools in a cold room (North Indian winters) | Still air, room temperature logged | Test conditions; care advice | Nothing |
| 5. Heavier oil or higher load (making: formula) | The same wick reaches the glass in a lighter oil | Same wick, lighter oil, side by side | Per-fragrance wick spec (6987) | Your own oil |
Cause 1 is the expected trade: a smaller wick puts less heat into the wax, which is how it stopped sooting. The question isn't whether the pool is smaller (it will be) but whether it is enough. Cause 2 is the commercial one, because customers' burn habits aren't yours: many people light a candle for an hour or two. A wick that only works in 4-hour sessions is a wick whose label has to say so. The published post on a wick that takes nearly four hours to reach the edge but otherwise burns cleanly is is it necessarily too small?.
The acceptance criteria, written down
| Criterion | How measured | Example limit | Why |
|---|---|---|---|
| Gate: combustion | Flame ruler, soot card, mushroom photo, glass with your own thermometer | Flame in your band (2.5–5 cm is a common rule of thumb); no smoke; glass within your limit | The reason for the change; must still hold to the bottom |
| 1. Edge by burn 2–3 | Pool width at hour 4, photo from above, inside diameter | Pool at the glass all round by the end of burn 3 (4-hour sessions), and at every later session | A ring that closes early doesn't become a tunnel |
| 2. No tunnel at full life | Ring width at the glass in the middle and bottom thirds | No ring wider than about 2 mm after burn 3 (your figure) | A ring that grows as the wax drops is the start of a tunnel |
| 3. Hang-up within limit | Spent candle weight − empty jar weight − designed floor | No more than 7.5 g (5% of a 150 g fill) per candle | Wax left on the walls is wax the customer paid for and couldn't burn |
| 4. Pool depth | Skewer midway, hour 4 | Inside your limit (about 1–1.5 cm is a common rule of thumb) | Confirms the smaller wick isn't still too strong lower down |
| 5. Short-burn behaviour | Two candles in 2-hour sessions, same measures | Recorded; decides the label, not the wick | How many customers will actually burn it |
Hang-up is the criterion most makers skip, and it's the one customers notice at the end: a jar with a thick collar of wax looks like a candle that gave up. Measuring it by weight makes it a number. Worked example, labelled: the designed floor in this jar is about 18 g (about 1 cm; how much floor to leave is 6970), so a spent candle with 23.5 g of wax left has 5.5 g of hang-up. Weigh each empty jar before you pour; that's the step people forget. The series' standard for an acceptable flame, as opposed to an impressive one, is 6919.
The replicate test: five candles, two burn habits
| Candle | Sessions | Edge by burn | Ring after burn 3 | Hang-up | Gate | Verdict |
|---|---|---|---|---|---|---|
| 1 | 4 h | 3 | none | 5.5 g | pass | pass |
| 2 | 4 h | 2 | none | 7.0 g | pass | pass |
| 3 | 4 h | 3 | none | 4.0 g | pass | pass |
| 4 | 2 h | never fully | about 2–3 mm, top third | 11.5 g | pass | fails hang-up |
| 5 | 2 h | 5 | about 1–2 mm | 9.0 g | pass | fails hang-up |
| Item | Need | Buy | ₹ |
|---|---|---|---|
| Wax: Luxury Soy Wax CSI 464 | 690 g | 1 kg (310 g spare) | ₹507.40 |
| Fragrance: your oil | 60 g | From stock | your own |
| Wicks: Eco C1 | 5 | C1 20-pack (15 spare) | ₹118.00 |
| Centring, if you have none | 5 holders | Wick Centering Device × 1 | ₹118.00 |
| Scale, if you have none | 1 | Candle Making Weighing Scale | ₹354.00 |
| Total, wicks and wax | C1 20 + 1 kg | ₹625.40 | |
| With the scale | + scale | ₹979.40 |
The decision, and the step to production
| Result | Verdict | What you do |
|---|---|---|
| All five pass | Acceptable | Approve C1; record the criteria and results; production by the month |
| 4-hour candles pass, 2-hour candles fail hang-up (the worked example) | Acceptable with first-burn advice | Approve C1 and put clear first-burn advice on the label ("burn until the melted wax reaches the edge", in your words); accept that short-burning customers will see a ring |
| Any 4-hour candle fails a pool criterion | Not acceptable | Not a wick to sell. Test a C1 pair, a lower load or a different oil; ask us for anything between C1 and C2 (we list nothing) |
| Any candle fails the gate | Not acceptable | Back to the soot diagnosis (6921) |
The middle row is a commercial decision, not a technical one, and it's yours. Some makers would rather the candle forgive short burns and will look for a configuration that does; others sell to customers who burn for an evening and accept a care instruction. What isn't acceptable is going back to the sooting wick to make the pool look better, or approving on one candle. The between-sizes options when C1 is genuinely too small are the hub's job (6981).
Argued against our own interest: for most readers in this position the test confirms the smaller wick, and the only purchase is the 20-pack you test with. Because C1 and C2 cost the same per wick at every pack size, there's no saving in a big pack; and C1 happens to be ₹3.54 a candle cheaper than C2, a side effect, never the reason. If the first-burn advice route is yours, ask us what the Candle Care Stickers actually say before you buy a roll; you may be better off printing your own wording.
The step to production quantity
Only after the three 4-hour candles pass. Worked example, labelled: 350 candles a month on C1 plus 2% is 357 wicks: 3 × 100 + 50 + 20 = 370 for ₹2,183.00. A 500-pack is the same ₹5.90 a wick and ties up ₹767.00 more. Reorder point = daily use × your lead time + safety stock; CSI publishes no lead times, so ask on WhatsApp. Before a large order, read replicates before a 2,000-wick purchase.
What to buy, and what to skip
Five items, chosen on page statements, price and stock on 7 October 2026. CSI publishes no pool, flame or soot data for any wick, so nothing is ranked on performance.
| 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 | the replicate test: 5 used, 15 spare |
| Thin (C1) / 50 | ₹295.00 | ₹5.90 | production top-up |
| Thin (C1) / 100 | ₹590.00 | ₹5.90 | production, by the month |
| 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 | same per wick |
| 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 | same per wick |
| Thick (C2) / 500 | ₹4,720.00 | ₹9.44 | same per wick |
| Thick (C2) / 1,000 | ₹9,440.00 | ₹9.44 | same per wick |
| Listing | Price | Stock | Use here |
|---|---|---|---|
| Candle Making Weighing Scale | ₹354.00 | In stock | residual wax, hang-up and grams per hour |
| Pack | Price | Per holder | Use |
|---|---|---|---|
| Pack of 5 | ₹118.00 | ₹23.60 | five test candles, one each |
| Pack | Price | Per sticker | Note |
|---|---|---|---|
| Pack of 500 (1 inch) | ₹413.00 | ₹0.83 | if its printed wording suits you |
| Pack of 1000 (1.5 inch) | ₹699.00 | ₹0.70 | same; larger sticker |
| Pack | Price | Per gram | Use |
|---|---|---|---|
| 500 g | ₹260.00 | ₹0.52 | not enough for five candles |
| 1 kg | ₹507.40 | ₹0.51 | five 150 g candles, 310 g spare |
| 5 kg | ₹2,537.00 | ₹0.51 | same per gram |
| 10 kg | ₹5,074.00 | ₹0.51 | production, after approval |
Skip for now: Cotton Braided (a rung above the wick that sooted); a second oil while the wick question is open; the care-sticker roll until you know its wording suits you; and any production wick pack before the three 4-hour candles pass.
CandleMakingSuppliesIndia sells the wicks, wax and tools named here, not finished candles. This page still tells you that the test usually needs only a 20-pack, that any reliable scale will do, that our wick range has no step between C1 and C2, and to check our care stickers' wording before buying them.
Every CSI price was checked on the live store on 7 October 2026, with stock checked per pack: the Eco C1 10-pack is out of stock and is not offered. Page wording is quoted and attributed, including the Wick Centering Device's 4 mm hole, the Steel Wick Holder's "3-hole layout" and the Eco wick page's "minimal soot or smoke".
The 7.5 cm jar, pool sizes, the 18 g floor, the 5% hang-up limit, the 2 mm ring limit, the consumption rates, the illustrative results, 350 candles a month and a 2% allowance are labelled worked examples, illustrations or our judgement. For bulk pricing, GST invoicing, and MSDS and IFRA documentation on request, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- My Current Wick Soots but the Next Size Down Tunnels — What Should I Test When Neither Wick Size Works Properly?
- How Do I Compare Wick Candidates When One Tunnels Slightly and Another Burns Edge-to-Edge but Mushrooms Heavily?
- My Corrected Wick Burns Cleanly but Produces Slightly Less Hot Throw — Should Safety and Combustion Quality Take Priority Over Maximum Fragrance Intensity?
- My New Wick Passed One Full Candle Test — How Many Repeat Burns Should I Perform Before Approving It for Production?
- I Have 2,000 Candles Planned — Should I Complete Multiple Replicate Burn Tests Before Purchasing 2,000 Production Wicks?
- My Candle Has a Very Tall Flame but the Melt Pool Still Does Not Reach the Glass — Why Might Simply Wicking Down Create Another Problem?
- How Much Wax Should Remain at the Bottom of a Container Candle Rather Than Trying to Burn Every Gram?
- How Do I Take a Candle from Large Flame / Soot / Mushrooming → Identify the Combustion Problem → Separate User Behaviour from Formulation Failure → Test Smaller or Alternative CSI Wicks → Complete Full-Life Burn Testing → Approve the Specification → Purchase Production Quantities?
Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on the product pages named on each card — Eco Candle Wicks, 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, Jaya Sawlani, Kaushiki Satarkar, Thenirvaofficial. The reviews from Ashwini 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); Candle Making Weighing Scale ₹354.00; Wick Centering Device (Pack of 5) ₹118.00 (₹23.60 each); Candle Care Stickers Roll Pack of 500 (1 inch) ₹413.00, Pack of 1000 (1.5 inch) ₹699.00; 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.
Non-price figures: "fixes soot" and "reduces the melt pool slightly" are the reader's words (title). The 150 g candle at 8% (12 g oil + 138 g wax, total-weight basis) is the series default for a 7–7.5 cm jar, labelled; the 7.5 cm inside diameter is the reader's measured jar. Pool areas use π × r² on the inside diameter. Pool sizes, the 18 g floor, hang-up figures, the 5% and 2 mm limits, 7.5 and 6.0 g/h, 350 candles a month and a 2% allowance are labelled worked examples or illustrations. The flame band (2.5–5 cm), pool depth (about 1–1.5 cm), 5–6 mm trim, 1 cm floor and about one hour per 2.5 cm are rules of thumb. Wax ceiling as the page states (CSI 464 up to 10%), a formulation limit. Costs exclude labour, freight, packaging and GST. Diwali 8 November 2026 is a calendar fact.