My New Fragrance Oil Batch Produces Stronger Hot Throw but More Soot — Could Small Batch Differences Require Wick Retesting?
शेयर करना
Should I just drop the wick size? Not blind. Run a mini re-bracket first. Six candles: the new lot on your current wick, the new lot one step down, and your retained old lot on the current wick as the control, each in duplicate.
How do I read it? If the new lot soots on the current wick, the control doesn't, and the step-down is clean with throw at least as good as the control, give the new lot the smaller wick. If the control soots too, it isn't the lot: look at trimming, draughts and the wick lot.
What does it cost? Worked example: ₹1,539.37 of materials (48 g of the new lot, 24 g of the old, 828 g of wax, six jars, four C2 and two C1). The only new purchase is usually ten C1 wicks at ₹59.00.
- Straight answer: does the wick need retesting?
- Why a stronger lot can overload the same wick
- Soot after a new lot: patterns and what settles each
- The mini re-bracket: three arms, six candles
- Reading the burns: the decision rule
- What not to buy, and when the fix is free
- Wicks, oils, wax and trimming for the re-bracket
- Frequently asked questions
Why a stronger lot can overload the same wick
A container wick draws melted wax and fragrance up by capillary action and burns it at the flame. The size you approved was the one that kept a full pool, a calm flame and no smoke with that oil at that load. Fragrance oils are blends. Two lots sold as the same product can differ slightly in the balance of lighter and heavier materials, and neither you nor we can see that from the bottle. CSI publishes no lot composition or reformulation notices, and we don't imply that any lot of ours has changed. What you can see is the burn. When a lot releases more scent and the same wick starts to smoke, the likeliest reading is that the flame now has a little more fuel than it burns cleanly. That is a tendency, not a certainty.
Soot has other, more common causes that have nothing to do with the lot. An untrimmed or long wick, a draught from a fan or window, a load at the top of the range, and long burns that let carbon build on the wick all produce the same smoke. So does a new carton of wicks that burns slightly differently. That last one has its own test in the new-wick-carton post. The re-bracket below is built so that all of these show up in the control as well as in the new lot. Only a difference between the two points at the oil.
The "stronger" part deserves one check too. If you compared new candles against old candles from your shelf, the old ones are older, their top notes have had weeks to fade, and your nose knows them. A fair comparison pours both lots on the same day. That is the control arm's other job. For the first-level picture of how oil changes a wick's behaviour, see the oil-and-wick hub.
Soot after a new lot: patterns and what settles each
The table ranks what we would suspect when a same-formula candle starts to soot after a new oil lot, most common first. The ranking is editorial judgement: CSI has no soot or failure statistics. The rule-in and rule-out columns are the observations that decide it.
| # | What you see | Likely cause | Rules it in | Rules it out |
|---|---|---|---|---|
| 1 | Soot only on long or untrimmed burns, near a fan or window | Burn conditions, not the lot | Soot disappears when trimmed, in still air | Soots trimmed, in still air, from the first hour |
| 2 | New lot soots on the current wick, old lot doesn't, same day and room | The new lot carries the current wick past its clean limit | A sooty, R clean, B clean | R soots as much as A |
| 3 | Both lots soot in the test | Wick lot, jar, trimming or room common to both | A and R alike; a new wick carton opened recently | R clean in the same session |
| 4 | Soot builds late: carbon cap, smoke after hour two or three | Carbon build-up on a wick near its upper edge (a tendency) | Mushroom score rises with burn length on A, not on B | No carbon on A after four hours |
| 5 | Soot and a larger, flickering flame on A; B tunnels | The current wick is too hot for the new lot, and one step down is too far | B's pool short of the edge after about 3–4 hours (rule of thumb) | B reaches the edge, calm |
| 6 | "Stronger" only against old shelf candles | Age: the old candles have faded | R, poured the same day, throws like A | A clearly stronger than R, same age |
The mini re-bracket: three arms, six candles
The worked example assumes your approved build is a 150 g Clear Glass Jar with Golden Lid, CSI 464 at 8% of total weight (12 g of oil + 138 g of wax) and an Eco C2 wick. If yours differs, keep everything as you make it and step your own wick down one size. Never raise the load during this test. If you ever do move it, stay inside the lower of the oil page's range and the wax ceiling; CSI 464 states up to 10% (15 g per 150 g), and a cautious top rung is 9% (13.5 g).
| Item | Used | Value of what is used |
|---|---|---|
| New lot (arms A and B) | 48 g (a 50 g bottle leaves 2 g) | ₹335.52 |
| Old retained lot (arm R) | 24 g | ₹167.76 |
| Luxury Soy Wax CSI 464, 1 kg at ₹507.40 | 828 g (172 g left) | ₹420.13 |
| Clear Glass Jar with Golden Lid (150 gram), pack of 10 at ₹944.00 | 6 jars | ₹566.40 |
| Eco Candle Wicks Thick (C2), ₹9.44 each | 4 (arms A and R) | ₹37.76 |
| Eco Candle Wicks Thin (C1), ₹5.90 each | 2 (arm B) | ₹11.80 |
| Whole re-bracket, material value | 6 candles | ₹1,539.37 |
Costs are worked examples and exclude labour, freight, packaging and GST. The oil, wax, jars and C2 wicks are usually already on your shelf, so new cash is often just ₹59.00 for ten C1. Set that against the run it protects. Worked example: one production candle (12 g at Spicy Cinnamon's 1 kg price, ₹77.99, plus wax, jar and C2) costs ₹251.85, and a 300-candle run ₹75,554.76. The re-bracket is 2.0% of that. With no old oil left, you lose arm R. Burn A and B against an unburned retained candle from the old lot, which is at least as old as the new pour. That control is weaker, because age and cure differ, so trust only a large difference.
Reading the burns: the decision rule
| What the arms show | What it points to | Decision | Purchase |
|---|---|---|---|
| A sooty; R clean; B clean, strong, pool to the edge | The new lot needs one wick step less | Give this lot the smaller wick; confirm with a full burn-down of B before a run; file the wick against the lot | C1 for production, ₹5.90 each |
| A sooty; R clean; B clean but weaker than R, or tunnelling | One wick step is too far for this jar | Back to the current wick with the new lot one load step lower (8% → 7% is 10.5 g of oil per 150 g), then retest | Nothing |
| A sooty; B sooty; R clean | The lot pushes the wick harder than one step fixes, or the load is near the edge for this lot | Test a load step on B's wick; send us your log with both lot numbers | Nothing yet |
| A and R both sooty | Not the lot: trimming, draught, wick carton, room | Check wick lot (3264) and conditions; re-test the old build | Nothing |
| Nothing soots in the test | Your production soot came from burn conditions | Keep the build; tighten trim and draught guidance on your label | Nothing |
| Duplicates disagree | Noise, centring or trimming | Repeat that arm before deciding | Nothing |
Soot is not the only thing a step-down can change. Before you switch a production line, run one B candle through a full burn-down, stopping with about 1 cm of wax left (common practice), and watch the final third. The pool, the flame and the glass all behave differently near the bottom of a jar. If the new wick is chosen for one lot, that is now a lot-specific spec. Record it on the batch sheet, and when the next lot arrives, re-run arm A against the approved B build before the wick decision carries over. For the full seven-criterion wick scorecard, see the perfect-pool, black-smoke post.
What not to buy, and when the fix is free
Soot on a candle you have been selling for months is alarming, and alarm sells products. Here is what we would not buy until the re-bracket has spoken.
Money direction, for the record: stepping from C2 to C1 lowers your wick cost by ₹3.54 a candle. Stepping the load from 8% to 7% lowers your oil cost by ₹9.75 a candle at Spicy Cinnamon's 1 kg price. Both fixes save money. The re-bracket costs nothing to run except the materials in six candles.
Wicks, oils, wax and trimming for the re-bracket
Five items: the step-down wick (with the control's C2), the spice oil named in the brief and its candle-grade alternative, the wax, and a trimmer. They are chosen on page statements, price per unit and stock on 26 September 2026. CSI has no measured soot or throw data, so nothing is ranked on either. Oil tables show every size, 150 g candles at 12 g, and how many 48 g re-bracket sets each size covers.
| Size | Price | Per unit | What it covers |
|---|---|---|---|
| Thin (C1) / 10 | ₹59.00 | ₹5.90 | arm B (two wicks) with eight spare |
| Thin (C1) / 20 | ₹118.00 | ₹5.90 | the same per wick; a confirmation round |
| Thin (C1) / 100 | ₹590.00 | ₹5.90 | production, only after C1 has passed a full burn-down |
| Thin (C1) / 500 | ₹2,950.00 | ₹5.90 | the same per wick; large runs |
| Thick (C2) / 10 | ₹94.40 | ₹9.44 | arms A and R if C2 is your current wick |
| Thick (C2) / 100 | ₹944.00 | ₹9.44 | the same per wick; old-lot production |
| Size | Price | Per gram | 150 g candles at 8% | Re-bracket new-lot arms (48 g) |
|---|---|---|---|---|
| 15g | ₹116.00 | ₹7.73 | 1 | none (15 g of the 48 g) |
| 50g | ₹349.00 | ₹6.98 | 4 | 1 (+2 g) |
| 100g | ₹699.00 | ₹6.99 | 8 | 2 (+4 g) |
| 500g | ₹3,249.00 | ₹6.50 | 41 | 10 (+20 g) |
| 1kg | ₹6,499.00 | ₹6.50 | 83 | 20 (+40 g) |
| Size | Price | Per gram | 150 g candles at 8% | Re-bracket new-lot arms (48 g) |
|---|---|---|---|---|
| 15 g | ₹106.20 | ₹7.08 | 1 | none (15 g of the 48 g) |
| 50 g | ₹330.40 | ₹6.61 | 4 | 1 (+2 g) |
| 100 g | ₹590.00 | ₹5.90 | 8 | 2 (+4 g) |
| 500 g | ₹2,950.00 | ₹5.90 | 41 | 10 (+20 g) |
| 1 kg | ₹5,310.00 | ₹5.31 | 83 | 20 (+40 g) |
| Size | Price | Per unit | What it covers |
|---|---|---|---|
| 500 g | ₹260.00 | ₹0.52 per g | not enough: six candles need 828 g |
| 1 kg | ₹507.40 | ₹0.51 per g | the six-candle re-bracket with 172 g spare |
| 5 kg | ₹2,537.00 | ₹0.51 per g | a confirmation round and first production |
| 10 kg | ₹5,074.00 | ₹0.51 per g | production; same per gram as 1 kg |
| Size | Price | Per unit | What it covers |
|---|---|---|---|
| Candle Wick Trimmer | ₹588.82 | ₹588.82 | identical trims across six test candles |
| Candle Wick Cutter | ₹295.00 | ₹295.00 | the same job, smaller tool |
| Candle Wick Cutter (second listing) | ₹177.00 | ₹177.00 | the same job, lowest price of the three |
CandleMakingSuppliesIndia sells the wicks, oils, wax and tools named here, and does not sell finished candles. This page still tells you that the commonest soot fixes cost nothing, that our candle-grade Cinnamon is a cheaper and more straightforward candle oil than the Spicy Cinnamon named in the brief, that a trimmer is a comfort rather than a necessity, and that the step-down wick lowers your costs.
Every price and per-gram figure was verified on CSI's live store on 26 September 2026; every size in the pick tables is in stock on that date, and the tables are built to flag any size that is not. Load, cure, wick and temperature wording is quoted from the product pages; where a page is silent in the text we captured (Spicy Cinnamon's candle load and cure), we say so. CSI publishes no lot composition, batch release data or measured soot or throw data.
The cause ranking, the 0–3 soot and throw scales, the soot limit and the diagram's positions are editorial judgement or worked examples; melt-pool times are commonly cited rules of thumb. For lot numbers, bulk pricing, GST invoicing, and MSDS and IFRA documentation on request, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- I Made the Exact Same Candle Formula as Last Month but This Batch Has Weaker Hot Throw — Which Raw Material Should I Investigate First?
- I Opened a New Carton of Candle Wicks and Suddenly My Flames Are Smaller — How Do I Compare the New Wick Batch with the Previous One?
- My Fragrance Oil Smells Slightly Different from My Previous Order — Should I Make New Test Candles Before Using It in Commercial Production?
- The Colour of My Fragrance Oil Changed Between Batches but the Supplier Says It Is the Same Product — What Should I Test Before Making Candles?
- My Bestselling Candle Suddenly Started Tunnelling Even Though I Didn’t Intentionally Change the Formula — Could a New Wax or Wick Batch Be Responsible?
- How Do I Create a Candle Batch Sheet That Records Wax Lot, Fragrance Lot, Wick Lot, Temperatures and Timings so I Can Trace Future Failures?
- My Candle Business Is Scaling and Random Quality Problems Are Increasing — How Do I Determine Whether the Problem Is Raw-Material Variation or Production Inconsistency?
- I Changed My Fragrance Oil Supplier and the Scent Smells Almost Identical but My Wick Now Mushrooms — Why Can Apparently Similar Fragrance Oils Burn Differently?
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 — Apple Cinnamon Fragrance Oil, British Rose Fragrance Oil, Eco Candle Wicks, Roasted Coffee Fragrance. They are general product reviews, not assessments of the diagnostic 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 — PREETHI PRASATH, Shivalik Manak, Monika Deep, Arminder Kaur. The reviews from Ashwini, Emma Bechara are published but not recorded as verified, and carry no badge. Reviews below five stars are included as published, not filtered out.
Figures verified 26 September 2026, CSI live pricing: Spicy Cinnamon 15 g ₹116.00 (₹7.73/g), 50 g ₹349.00 (₹6.98/g), 100 g ₹699.00 (₹6.99/g), 500 g ₹3,249.00 (₹6.50/g), 1 kg ₹6,499.00 (₹6.50/g); Cinnamon Fragrance Oil 15 g ₹106.20 (₹7.08/g), 50 g ₹330.40 (₹6.61/g), 100 g ₹590.00 (₹5.90/g), 500 g ₹2,950.00 (₹5.90/g), 1 kg ₹5,310.00 (₹5.31/g); Eco Candle Wicks Thin (C1) 10 ₹59.00, 20 ₹118.00, 100 ₹590.00, 500 ₹2,950.00; Thick (C2) 10 ₹94.40, 100 ₹944.00; Luxury Soy Wax CSI 464 500 g ₹260.00, 1 kg ₹507.40, 5 kg ₹2,537.00, 10 kg ₹5,074.00; Clear Glass Jar with Golden Lid (150 gram) Pack of 10 ₹944.00; Candle Wick Trimmer ₹588.82; Candle Wick Cutter ₹295.00 and ₹177.00. All in stock on 26 September 2026. Per gram = price ÷ grams; per wick or jar = pack price ÷ units; two decimals. Worked costs use the exact per-gram price, then round.
Non-price figures: load is a percentage of total candle weight (150 g at 8% = 12 g oil + 138 g wax; 7% = 10.5 g; 10% = 15 g). Wax ceilings and temperatures are as stated on the product pages (CSI 464 up to 10%, pour 80–90°C; 150 g jar hot pour up to 85°C) and are formulation limits, not regulatory limits. Spicy Cinnamon's "EDP (20–25%)" is a perfume usage rate, not a candle load. The six-candle design, three four-hour burns, 0–3 scales, soot limit, diagram positions and the 300-candle run are worked examples or editorial judgement; melt-pool times are rules of thumb; stopping with about 1 cm of wax left is common practice. Costs exclude labour, freight, packaging and GST. Diwali 8 November 2026 is a calendar fact.