I’m Using an 8 cm Jar with 10% Coffee Fragrance and My Wick Keeps Mushrooming — Would Reducing Fragrance Load Potentially Improve the Burn?
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What is the test? Six 200 g candles on your current wick, unchanged: two at 10%, two at 8%, two at 6%. Score the mushroom after each session and the throw blind, at each load. 96 g of Roasted Coffee, 1,104 g of wax, ₹992.52 in materials.
How do I choose? Take the highest load that keeps the mushroom small (a score of 1 or less, our judgement) without a clear drop in blind throw. If even 6% mushrooms, it is the wick, not the oil: test one rung down instead.
Is lower load always weaker? Not always. The Coffee Vanilla Tobacco page says "7-9% soy wax (strong throw at lower loads)". Some oils are built to work below 10%; your blind scores tell you if yours is one.
- Straight answer: will less oil stop the mushroom?
- Why load and mushrooming are linked, and why less oil doesn't always help
- 10% is the top of both pages
- The step-down: 10, 8 and 6% on one wick
- Scoring the mushroom and the throw at each step
- What the lower load costs in scent, and in rupees
- The real-world case: a coffee oil built for 7–9%
- What the step-down needs from the shelf
- Frequently asked questions
Why load and mushrooming are linked, and why less oil doesn't always help
Mushrooming is the carbon cap that builds on the tip of a wick as it burns. It is commonly linked to three things: a wick delivering more fuel than the flame burns cleanly (over-wicking), heavy fragrance or dye loads, and long sessions. Heavier, viscous or vanillin-rich oils (coffee, vanilla, oud, sandalwood and many gourmands) are the ones commonly associated with it. Roasted Coffee's notes run from coffee bean to "dark chocolate and espresso" and a "warm vanilla and caramel base": a dense profile. CSI has no measured wick data for any oil, so this is a tendency, not a finding.
That is why lowering the load can help: less of the heavy material reaches the wick. It is also why it might not: if the wick is simply too big for an 8 cm jar, it will cap at 6% too. The step-down separates those two stories, because the wick never changes. If the soot, not the mushroom, is what worries you, the timing method is the soot-onset clock, and the larger-jar version of this trade is the 10 cm coffee soot-down matrix. How a mushroom behaves over many cycles, and how to score it consistently, is the mushrooming-after-several-cycles post; we use its idea of a 0–3 score here and keep this page about the load decision.
10% is the top of both pages
Two ceilings apply and the lower one governs. The Roasted Coffee page states "candles (6-10%)". CSI 464's page states "Fragrance Load Up to 10%". So 10% sits on both limits, and 8% and 6% sit inside both. These are formulation limits from the pages, not regulatory ones.
One nuance. This series measures load as a percentage of the total candle weight, so a 200 g candle at 10% holds 20 g of oil and 180 g of wax. The CSI 464 page doesn't say which basis its 10% uses. Read cautiously as 10% of wax weight, it allows 9.09% of total; your 10% of total is 11.11% of wax weight, just over that reading. 9% of total (9.89% of wax) fits either reading. If you are also changing the oil, untangle oil from load first (the 7.5 cm oud confound shows the three-cell design). If your 10% came from "oil added to wax", recompute it: the basis alone may have put you over. The conversions are in the load-basis hub.
| Load | Oil | Wax | Oil cost, 100 g price | Oil cost, 1 kg price | Candles per kg of oil |
|---|---|---|---|---|---|
| 10% (page top, CSI 464 ceiling) | 20 g | 180 g | ₹78.00 | ₹74.76 | 50 |
| 8% | 16 g | 184 g | ₹62.40 | ₹59.81 | 62 |
| 6% (page bottom) | 12 g | 188 g | ₹46.80 | ₹44.86 | 83 |
Going from 10% to 8% removes 4 g of oil, 20% of what was there; going to 6% removes 8 g, 40%. Those are big cuts in the material most associated with the mushroom, which is exactly why they can also be big cuts in scent.
The step-down: 10, 8 and 6% on one wick
Our worked example uses a 200 g fill for an 8 cm jar (measure yours: the inside of a jar sold as 8 cm is about 7.3 cm on a 0.35 cm wall, a 41.85 cm² pool, against 50.27 cm² if 8 cm is the inside). Keep everything else fixed: the same wax bag, the same jar batch, the same wick type and length, the same pour temperature, cure and room.
Scoring the mushroom and the throw at each step
Mushroom
Use a simple 0–3 score: 0 no cap, 1 a small bead, 2 a clear cap, 3 a large cap, often with smoke or soot. The fuller method, with cumulative hours and an unscented control, is in 3247. Score before trimming, after every session, and average the two candles at each load.
Throw, blind
One candle per room at a time, in a closed room you use every time (a worked example: a 10 m² bedroom, door shut). Light it, leave the room, and have each of three people walk in at 1 hour and at 2 hours, spend about half a minute, and score 0–3 (0 nothing, 3 strong) without knowing the code. Air the room out between candles and give noses a break outside; perceived strength drops with continuous exposure. Average the three people's scores for each candle.
| Load | Mushroom (mean) | Flame, trimmed | Soot on glass | Blind throw (mean) | Reading |
|---|---|---|---|---|---|
| 10% | 2.5 | about 4.5 cm, flickers late | faint band by session 3 | 2.5 | Strong, but the burn is the problem you started with |
| 8% | 1.5 | about 4 cm, steady | none | 2.2 | Mushroom down a point, throw within half a point |
| 6% | 0.5 | about 3.5 cm, steady | none | 1.3 | Clean burn, clearly weaker |
In this example the answer is not "6% because it is cleanest". 6% buys the last point of mushroom with more than a point of throw. 8% keeps nearly all the scent and removes a point of mushroom but still sits above the 1-or-less line. That points to one more small, single change at 8%, not a slide to 6%.
What the lower load costs in scent, and in rupees
| What the log shows | Decision | Next |
|---|---|---|
| 8%: small mushroom, throw holds | Move to 8% | Full life at 8% on the same wick; update your formula card |
| 8%: throw holds, mushroom still about 1.5; 6%: small mushroom but throw drops | Load alone is not enough without losing scent | Keep 8% and test one wick rung down at 8% (C2 → C1): one variable again |
| 6% only has a small mushroom, and its throw holds | Move to 6% | Uncommon in our judgement; confirm with a second pair before relabelling |
| All three loads mushroom about equally | It's the wick, not the oil | Stay at your preferred load; bracket one rung down |
| Mushroom falls but every lower load smells clearly weaker | This oil needs its load | Keep 10% (or 9%, which fits either ceiling reading) and fix the burn with the wick |
The rupees favour the lower load, but not by as much as the grams suggest. At the 1 kg price (₹3.74 a gram, ₹3,738.00 a kilo), 10% is ₹74.76 of oil per candle and 8% is ₹59.81: ₹14.95 saved per candle, ₹1,495.20 per 100 candles. At 6% you save ₹29.90 a candle. Those savings are worth having only if the candle still sells on scent. Costs exclude wax, jar, wick, labour, freight, packaging and GST.
The real-world case: a coffee oil built for 7–9%
CSI's Coffee Vanilla Tobacco Fragrance Oil page states "Recommended load - candles: 7-9% soy wax (strong throw at lower loads)". That is a page claim, not CSI test data, but it is exactly the pattern this post tests for: an oil whose maker expects it to perform below 10%. If your 10% coffee candle uses this oil, you are above its page's range, and stepping down to 9% or lower is not an experiment; it brings the candle inside the page.
If you want to try it, run the same step-down one rung lower: 9%, 8% and 7% on the same wick, two candles each (18 g, 16 g and 14 g of oil per 200 g candle, 96 g in all, two 50 g bottles at ₹898.00). Score it with the same sheet.
What the step-down needs from the shelf
Four items, chosen on page statements, price and stock on 29 September 2026. CSI publishes no wick-performance or throw data, so nothing is ranked on burn results.
| Item | Size bought | Used | Cost of what is used |
|---|---|---|---|
| Roasted Coffee Fragrance | 100 g, ₹390.00 (₹3.90/g) | 96 g (2 × 20 g, 16 g, 12 g; 4 g left) | ₹374.40 |
| Luxury Soy Wax CSI 464 | 1 kg ₹507.40 + 500 g ₹260.00 | 1,104 g (396 g left) | ₹561.48 |
| Eco C2 | 10, ₹94.40 | 6 wicks (4 spare) | ₹56.64 |
| Your 8 cm jars | your own | 6 jars | not counted |
| Step-down, materials consumed | 6 candles | ₹992.52 |
From nothing the cash outlay is ₹1,251.80. All costs are worked examples and exclude jars, labour, freight, packaging and GST. For comparison, the series' standard 150 g candle at 8% holds 12 g of oil.
| Size | Price | Per gram | 200 g candles at 10% / 8% / 6% | 150 g candles at 8% |
|---|---|---|---|---|
| 15 g | ₹93.22 | ₹6.21 | 0 / 0 / 1 | 1 |
| 50 g | ₹230.00 | ₹4.60 | 2 / 3 / 4 | 4 |
| 100 g | ₹390.00 | ₹3.90 | 5 / 6 / 8 | 8 |
| 500 g | ₹1,890.00 | ₹3.78 | 25 / 31 / 41 | 41 |
| 1 kg | ₹3,738.00 | ₹3.74 | 50 / 62 / 83 | 83 |
| Size | Price | Per gram | 200 g candles at 9% / 8% / 7% | 150 g candles at 8% |
|---|---|---|---|---|
| 50 g | ₹449.00 | ₹8.98 | 2 / 3 / 3 | 4 |
| 100 g | ₹899.00 | ₹8.99 | 5 / 6 / 7 | 8 |
| 500 g | ₹4,399.00 | ₹8.80 | 27 / 31 / 35 | 41 |
| 1 kg | ₹8,599.00 | ₹8.60 | 55 / 62 / 71 | 83 |
| Pack | Price | Per unit | What it covers here |
|---|---|---|---|
| Thick (C2) / 10 | ₹94.40 | ₹9.44 | all six step-down candles, 4 spare |
| Thick (C2) / 20 · 50 · 100 | ₹188.80 · ₹472.00 · ₹944.00 | ₹9.44 | production at the chosen load |
| Thin (C1) / 10 · 20 | ₹59.00 — Out of stock · ₹118.00 | ₹5.90 | only if the step-down clears nothing (a wick test) |
| Pack | Price | Per unit | What it covers here |
|---|---|---|---|
| 500 g | ₹260.00 | ₹0.52 per g | tops up the 1 kg for the sixth candle |
| 1 kg | ₹507.40 | ₹0.51 per g | five of the six candles |
| 5 kg · 10 kg | ₹2,537.00 · ₹5,074.00 | ₹0.51 per g (10 kg ₹0.51) | production; flat per gram from 1 kg |
CandleMakingSuppliesIndia sells the coffee oils, wicks and wax named here, and does not sell finished candles. This page still tells you the test may end with you buying less oil from us, and that the dearer coffee oil with the lower stated load is not a cheaper candle.
Every price was verified on CSI's live store on 29 September 2026. Stock was checked per size: every size shown is in stock except the Eco C1 10-pack, flagged where it appears. Load, cure and throw wording is quoted from the product pages as their claims; where a page is silent in the text we captured, we say so.
The decision thresholds, the 0–3 scores, the 200 g fill, the 0.35 cm wall and the step-down log are our judgement or worked examples; the link between heavy oils, high loads and mushrooming is a commonly reported tendency, not CSI data; CSI publishes no wick-performance or throw data. For bulk pricing, GST invoicing, and MSDS and IFRA documentation on request, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- I’m Using a 7.5 cm Jar with Soy Wax and 8% Lavender Fragrance — The Candle Tunnels for Two Burns but Eventually Catches Up; Should I Change the Wick?
- My 7.5 cm Coffee Candle Gives Excellent Hot Throw but Produces Soot After Three Hours — How Do I Keep the Fragrance Performance While Correcting Combustion?
- My 7.5 cm Jar Works Perfectly with Lavender but the Same Wick Mushrooms Badly with Oud at 10% — Why Does Changing Only the Fragrance Alter the Burn?
- My 8 cm Jar with 8% Lavender Reaches the Edges Perfectly but the Same Wick Leaves Unmelted Wax with Sandalwood — What Should I Change?
- My 8 cm Oud Candle Produces a Large Flame but Still Doesn’t Create Strong Room-Filling Fragrance — Why Doesn’t a Hotter Burn Automatically Mean Better Hot Throw?
- My 8 cm Jar Uses a Premium Expensive Fragrance at Only 6% — Should I Start Wick Testing from the Same Size Used for My 8% Fragrances?
- My 6.5 cm Candle with 8% Coffee Fragrance Has a Small Flame and Leaves Wax Around the Edges — Should I Increase Wick Size or Reduce Fragrance Load First?
- My 10 cm Coffee Candle Has Fantastic Hot Throw but Excessive Soot — How Do I Preserve Diffusion While Reducing Total Wick Power?
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, Autumn, Gilli Mitti (Patchouli), Orchard Pear, Roasted Coffee Fragrance, Tin Containers for Candle Making - 85 & 135g. They are general product reviews, not assessments of the 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 — Arminder Kaur, Shivalik Manak, Ranjita RAO, M A, Renu, Jinal Monil. Reviews below five stars are included as published, not filtered out.
Figures verified 29 September 2026, CSI live pricing: Roasted Coffee Fragrance 15 g ₹93.22 (₹6.21/g), 50 g ₹230.00 (₹4.60/g), 100 g ₹390.00 (₹3.90/g), 500 g ₹1,890.00 (₹3.78/g), 1 kg ₹3,738.00 (₹3.74/g); Coffee Vanilla Tobacco Fragrance Oil 50 g ₹449.00 (₹8.98/g), 100 g ₹899.00 (₹8.99/g), 500 g ₹4,399.00 (₹8.80/g), 1 kg ₹8,599.00 (₹8.60/g); Eco Candle Wicks Thick (C2) 10 ₹94.40, 20 ₹188.80, 50 ₹472.00, 100 ₹944.00; Thin (C1) 10 ₹59.00 (out of stock), 20 ₹118.00; Luxury Soy Wax CSI 464 500 g ₹260.00, 1 kg ₹507.40, 5 kg ₹2,537.00, 10 kg ₹5,074.00. Every other size shown is in stock on 29 September 2026. Per unit = price ÷ grams or units, two decimals.
Non-price figures: load is a percentage of total candle weight (200 g at 10% = 20 g oil + 180 g wax; 8% = 16 g + 184 g; 6% = 12 g + 188 g); the basis conversions are declared. The 200 g fill and 0.35 cm wall are labelled worked-example assumptions. Ceilings are as the pages state (CSI 464 up to 10%, pour 80–90°C; Roasted Coffee 6–10%; Coffee Vanilla Tobacco 7–9% for soy): formulation limits, not regulatory ones. Session length and full-pool time (about an hour per 2.5 cm) are rules of thumb; the 10 m² room is a worked-example input. The scores, thresholds and log are editorial judgement and illustrative. Costs exclude jars, labour, freight, packaging and GST. Diwali 8 November 2026 is a calendar fact.