I’m Using the Same Formula but Different Melting Equipment — Can Heating Speed and Temperature Control Change the Final Candle?
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How do I find out? Run an equipment qualification. Heat unscented wax to your target in the old and the new set-up, and log with one checked thermometer: minutes to temperature, the highest reading on the way up, and readings every 5 minutes through a 30-minute hold.
What counts as a pass? Every reading, including the peak, inside the range you work to from your wax page. For CSI 464 that is the page's 80–90°C pour range, and 80–85°C at the pour in the 150 g clear jar. Steady but outside the range is a fail, however stable it looks.
What should I buy? Usually a thermometer, nothing else (₹354.00 if you don't own one). A new oil, a higher load or a different wax won't fix a heater that runs hot.
- Straight answer: can the heater change the candle?
- A new heater is a new process step
- Symptoms after an equipment change, and what settles each
- What the melter pages say, read against your wax
- The qualification run: unscented wax, one thermometer
- Pass, adjust or reject: reading the run
- What not to buy when the candles change
- Thermometer, melters, wax and the confirmation oil
- Frequently asked questions
A new heater is a new process step
When makers change equipment they usually change it for a good reason. A double boiler on the stove is slow, and in a cold room the wax cools while you work. A 1 litre melter is quicker and tidier. A 10 kg melter makes production possible at all. What they rarely change is the written process, because it still says "melt, add oil, stir, pour". The candles come out different, and the suspicion falls on the last bag of wax or the last bottle of oil. Before that, look at what the new equipment changed.
Peak temperature: how far it overshoots
A heater that is still pushing energy when the wax reaches the number you wanted will carry it past that number. Fast, powerful elements tend to overshoot more than a water bath, which slows down as it nears boiling. The wax against the heated wall can also run hotter than the wax in the middle until you stir it. If your oil goes in during that overshoot, it goes into hotter wax than your formula assumed. As a tendency, hotter or longer exposure can drive off lighter top notes and may darken some oils (the temperature hub covers what the wax pages state; the evaporation question covers the first-level version).
Hold: how long it stays hot
A pot on the stove is usually melted, scented and poured in one go. A melter invites you to leave the wax in it, and one reviewer on this page says as much about the mini melter: "Now i just leave my wax in the melter and thats it." That's convenient, and it's also a new variable. Wax held at temperature for an hour before the oil goes in is not the same process as wax that reached temperature and was scented straight away. That is especially true if the oil is added early and the scented wax then waits.
Evenness and the reading you take
Where the probe sits changes the number. Near the element, at the surface, in the centre after a stir: three places, three readings, until the wax is mixed. A melter's display or a gear's stated range describes the heater, not the wax at the moment your oil goes in. That's why this post measures the wax, in the centre, after a 10-second stir, every time.
Symptoms after an equipment change, and what settles each
The table ranks what we would suspect when a formula changes behaviour after new melting equipment, most common first. The ranking is editorial judgement; CSI has no data on how often each happens. The last two columns tell you what the qualification run or a simple check would show.
| # | What you see | Likely equipment cause | Rules it in | Rules it out |
|---|---|---|---|---|
| 1 | Top notes flatter, same oil lot and load | Oil added into hotter wax than before: overshoot, or a setting that runs hot | The run shows a peak or hold above the temperature you wrote down | New set-up holds inside your range, peak included |
| 2 | Wax slightly darker with a vanilla-rich oil | Hotter or longer hold with the oil in | Hold log longer or hotter than the old routine; the unscented run wax stays its usual colour | Same hold and temperature as before |
| 3 | Tops rougher, more frosting or wet spots | Pour temperature isn't what you think (dial or gear ≠ wax) | Thermometer at pour disagrees with the setting | Pour readings match the old routine; look at the room (rough tops by month) |
| 4 | Candles vary within one batch | Uneven heat in a larger pot; less stirring than before | Centre and wall readings differ before a stir | Readings agree; the pour window is next (the 20 kg cooling post) |
| 5 | A faint ghost of another scent | Residue from the last scent in the melter | An unscented pour from the unit smells of something | Unscented pour smells of plain wax |
| 6 | Nothing in the run differs from the old set-up | Not the equipment | — | Go back to the suspect ranking in the cluster hub |
Row 6 matters as much as row 1. An equipment change often lands in the same month as a new wax bag or a new oil order, and the timing makes the heater look guilty. If the run shows the new unit matching the old one, you have ruled it out for the price of an afternoon, and the lot comparison posts (new wax lot, the hub) take over.
What the melter pages say, read against your wax
CSI lists two electric melters, and both pages give temperature wording worth reading carefully. This isn't a criticism of either unit; it's why neither dial nor gear replaces a thermometer. Every figure below is quoted from the pages as captured on 26 September 2026.
| Equipment page | What the page says | Against CSI 464 (pour 80–90°C) | Against CSI 468 (pour 58–60°C) |
|---|---|---|---|
| Mini Electric Wax Melter, Gear I | "slow, controlled melting reaching approximately 70-85°C" | Straddles the bottom of the range; may or may not reach 80°C with your charge. Measure | Above the pour range; melt, then let it fall to 58–60°C |
| Mini melter, Gear II | "reaches up to 100-120°C for faster melting" | Above the range; melting speed only, never an oil-add setting | Well above; melting only |
| Mini melter FAQ | "The ideal melting range for most candle waxes is 80-90°C" | Matches the CSI 464 pour figure | Doesn't match; CSI 468's page governs |
| Electric Wax Melter (10/20 kg) | "The display ranges from 60°C to 100°C"; "The ±10°C deviation" | A ±10°C spread (20°C) is wider than the whole 10°C range | A 2°C window can't be held on the display alone |
| Electric Wax Melter | "melt 10 kg of soy wax in approximately 30 minutes at 100°C" | A melting setting above the range; come back down before oil | Far above; come back down to 58–60°C |
The general rule for every row: the wax page governs the temperature at which oil goes in and the candle is poured; the equipment page describes how the heater behaves. Where a wax page gives no figure (Luxury Soy Wax Chunks says only "Add fragrance at the recommended temperature"), work to the figure you already use and write it down. The qualification run then tells you whether the new equipment can hold it. For conflicting supplier figures, the which-recommendation-wins post sets the order.
The qualification run: unscented wax, one thermometer
Unscented, because the question is about the heater. Oil adds cost and a cure wait, and it adds a second variable. The same wax, in the same amount, goes through the old set-up and the new one, read by the same probe. The worked example uses a 700 g charge of CSI 464 (₹355.18 at the 1 kg price); it isn't used up, and goes into the confirmation candles or the next batch afterwards. Use the amount you really melt: a 700 g run in a unit you normally fill with 10 kg tells you little.
| Set-up | Minutes to 80°C | Peak on the way up | Hold readings (7, every 5 min) | Hold span | Verdict vs 80–90°C |
|---|---|---|---|---|---|
| Old: double boiler on the stove | 38 | 84°C | 84, 83, 82, 82, 81, 81, 80 | 4°C | Inside; drifting down, so read before adding oil |
| New unit, setting A (as first used) | 14 | 97°C | 96, 94, 95, 93, 95, 94, 96 | 3°C | Steady but 7°C over the top of the range at its peak: fail |
| New unit, setting B (turned down) | 17 | 88°C | 86, 84, 85, 83, 85, 84, 86 | 3°C | Inside: pass, subject to the scented confirmation |
Read the example the way you'd read your own. Setting A was 24 minutes quicker to 80°C, and its hold span was as narrow as any in the table. By the "is it stable?" test it looks like the best set-up. By the only test that matters, it spent the whole hold above the wax page's range, so any oil added during it went into wax hotter than the formula assumed. That's the pattern behind symptom 1 in the table. Setting B is the same unit, turned down: slightly slower, and inside the range. The old double boiler passed too, but drifted downwards, which is why its users learned to read it just before adding oil.
Pass, adjust or reject: reading the run
| What the run shows | Verdict | What to do | Purchase |
|---|---|---|---|
| Peak and all hold readings inside the range, both days | Pass | Write the setting into the SOP; run the scented confirmation | Nothing |
| Steady but above (or below) the range | Adjust | Change the dial or gear, re-run; if no setting lands inside, melt in the unit and bring the wax to temperature with a probe before oil | Nothing |
| Swings wider than the range during the hold | Not fit for oil addition on its own | Read before every addition and every pour, and write the reading on the batch sheet | A thermometer, if you don't own one |
| Centre and wall differ noticeably before a stir | Evenness issue | Stir before every reading and before oil; for large pots see the 1 kg to 10 kg post | Nothing |
| Unscented wax smells of a previous scent | Residue | Clean per the page; dedicate a unit or liner to strong scents if you can (judgement) | Nothing |
| New matches old within a degree or two | Not the equipment | Back to the lot and process suspects | Nothing |
The scented confirmation pair
A pass on unscented wax says the heater can hold your range. It doesn't prove the candles now match, so confirm with two scented candles from each set-up, poured the same day. The worked example uses Lemongrass and Lime, because its bright top notes are, as a tendency, the part most exposed to a hot hold. Use your production oil if you have it. Each 150 g candle at 8% of total weight is 12 g of oil and 138 g of wax (the oil page states 6–10%, CSI 464 states up to 10%, so 8% sits inside both ceilings). Four candles take 48 g of oil and 552 g of wax. One 50 g bottle covers them with 2 g left, not enough for a retest, so buy 100 g if you expect one. Oil goes in at the same measured temperature for both set-ups. The pour is at 80–85°C in the 150 g clear jar, whose page says "Safe for hot pour up to 85°C".
| Item | Quantity | Basis | Cost |
|---|---|---|---|
| Lemongrass and Lime | 48 g | 50 g bottle, ₹330.00 | ₹316.80 |
| Luxury Soy Wax CSI 464 | 552 g | 1 kg price | ₹280.08 |
| Clear Glass Jar with Golden Lid (150 gram) | 4 | pack of 10, ₹944.00 | ₹377.60 |
| Eco Candle Wicks Thin (C1) | 4 | pack of 10, ₹59.00 | ₹23.60 |
| Materials consumed | 4 candles | excludes labour, freight, packaging and GST | ₹998.08 |
Label the candles with a code, not "old" and "new", so the person judging doesn't know which is which. Judge at the same cure age: the oil page states no cure time in the text we captured, and many makers judge soy at day 7 and again at day 14 (common practice, not a rule). Burn them in the same closed room on the same day, one pair at a time, with a fresh nose. If the codes can't be told apart, the new set-up is qualified. If the new-unit pair is consistently flatter, go back to the log. The hold was probably still too hot or too long with the oil in, and the looks-normal post explains why that can happen without any visible sign.
What not to buy when the candles change
If the run shows the equipment matching the old set-up, that is progress: the heater is off the suspect list for the cost of an afternoon. From there, compare the batch records row by row (the process-fields post says which rows matter), and if two people now make candles on the new unit, the shadow-run post is the next test. For the wider question of what changes when production grows, the scale-up variables post covers the planning side.
Thermometer, melters, wax and the confirmation oil
Five items: the probe the run depends on, the two melters CSI lists (with their page wording), the unscented wax the run is built on, and an oil for the confirmation pair. They are chosen on page statements, price and stock on 26 September 2026. CSI has no measured heating or temperature-control data for any of them, so nothing is ranked on performance.
| Size | Price | Per unit | What it covers |
|---|---|---|---|
| Single | ₹354.00 | ₹354.00 | every reading in the run, and every batch after it (range and accuracy not stated on the page) |
| Size | Price | Per unit | What it covers |
|---|---|---|---|
| 1 litre, 300W / 600W | ₹2,360.00 | ₹2,360.00 | small batches; qualify each gear with your own wax before trusting it |
| Size | Price | Per unit | What it covers |
|---|---|---|---|
| 10 kgs capacity | ₹21,240.00 | ₹21,240.00 | production melts; the page states ±10°C deviation, so check every batch |
| 20 kgs capacity | ₹25,960.00 | ₹25,960.00 | larger production melts; same check |
| Size | Price | Per unit | What it covers |
|---|---|---|---|
| 500 g | ₹260.00 | ₹0.52 per g | a small qualification charge, reusable afterwards |
| 1 kg | ₹507.40 | ₹0.51 per g | the 700 g qualification charge, then the confirmation candles |
| 5 kg | ₹2,537.00 | ₹0.51 per g | production once the unit has passed |
| 10 kg | ₹5,074.00 | ₹0.51 per g | a full charge for the 10 kg melter, flat per gram |
| Size | Price | Per gram | 150 g candles at 8% | For this test |
|---|---|---|---|---|
| 15 g | ₹116.52 | ₹7.77 | 1 | one candle, no duplicate |
| 50 g | ₹330.00 | ₹6.60 | 4 | the four confirmation candles, 2 g spare |
| 100 g | ₹590.00 | ₹5.90 | 8 | confirmation plus a retest |
| 500 g | ₹2,600.00 | ₹5.20 | 41 | production after the unit passes |
| 1000 g | ₹5,200.00 | ₹5.20 | 83 | production; same per gram as 500 g |
CandleMakingSuppliesIndia sells both melters, the thermometer, the wax and the oil named here, and does not sell finished candles. This page still tells you that a double boiler that passes the run needs no replacement, that a melter is a capacity purchase and not a fix, and that no oil or wax we sell corrects a heater that runs hot.
Every price was verified on CSI's live store on 26 September 2026. Every item in the pick tables is in stock on that date, and the tables are built to flag any size that is not (the Small Steel Pouring Pitcher is out of stock, so it isn't offered). Melter, wax and jar wording is quoted from the product pages as captured.
The minutes and readings in the diagram and log are a worked example, not measurements of any CSI product: CSI publishes no heating-rate or temperature-control test data. The cause ranking, the pass/adjust/reject rule and the choice of confirmation oil are editorial judgement. For 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?
- My 20 Kg Wax Batch Cools Much More Slowly than My 1 Kg Test Batch — Can Production Scale Affect Fragrance Mixing and Finished Candle Consistency?
- I Increased My Batch Size from 1 Kg to 10 Kg and the Finished Candles No Longer Perform Exactly Like the Test Batch — What Changed?
- My Candle Tops Become Rough Only During Certain Months of the Year — Should I Change Pouring Temperature Based on Workshop Conditions?
- My New Soy Wax Batch Feels Softer than the Previous One and My Candles Burn Differently — How Do I Verify Whether the Wax Itself Changed?
- One Employee Makes Perfect Candles with My Formula but Another Gets Rough Tops and Inconsistent Scent — Which Process Variables Should I Standardise?
- My Candle Formula Is Written in Percentages but Production Results Still Vary Between Batches — What Additional Process Information Should I Record?
- 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?
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 — Luxury Soy Wax CSI 464 (Flakes Form) For Container Candles, Soy Pillar Wax (Specially made for Pillar and Designer Candles), [1 Year Warranty] Mini Electric Wax/Soap Melter (1 litre capacity). 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 — Tanya Walia, Priya Singh, Mohabatti Ki Dukaan, Raajull Bhatt, Deepika k., Jaya Sawlani. Reviews below five stars are included as published, not filtered out.
Figures verified 26 September 2026, CSI live pricing: Pen Thermometer For Candle Making ₹354.00; [1 Year Warranty] Mini Electric Wax/Soap Melter (1 litre capacity) ₹2,360.00; Electric Wax Melter 10 kgs capacity ₹21,240.00, 20 kgs capacity ₹25,960.00; Luxury Soy Wax CSI 464 500 g ₹260.00, 1 kg ₹507.40, 5 kg ₹2,537.00, 10 kg ₹5,074.00; Lemongrass and Lime 15 g ₹116.52, 50 g ₹330.00, 100 g ₹590.00, 500 g ₹2,600.00, 1 kg ₹5,200.00; Clear Glass Jar with Golden Lid (150 gram) Pack of 10 ₹944.00, Pack of 20 ₹1,888.00; Eco Candle Wicks Thin (C1) 10 ₹59.00. All in stock on 26 September 2026; Steel Pouring Pitcher Small is out of stock. Per gram = price ÷ grams; per unit = 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; 9% = 13.5 g; 10% = 15 g). Temperatures are quoted from the product pages: CSI 464 pour 80–90°C and up to 10%; CSI 468 melt 50–53°C, pour 58–60°C; 150 g clear jar hot pour up to 85°C; mini melter Gear I approximately 70–85°C, Gear II up to 100–120°C; Electric Wax Melter display 60–100°C with ±10°C deviation. These are formulation and equipment statements, not regulatory limits. The run's minutes and readings (38, 14 and 17 minutes; peaks 84, 97 and 88°C), the 700 g charge and the 60-candle batch are a worked example. The ice-water check (close to 0°C) is general practice. Cure ages of day 7 and 14 are common practice. Costs exclude labour, freight, packaging and GST. Diwali 8 November 2026 is a calendar fact.