I Melted 25 Kg of Wax but Cannot Account for the Expected Number of Finished Candles — Where Should I Look for Process Loss?
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Where does process loss usually hide? Melter heel, pitcher film, funnel residue, spills, unused top-up wax, rejects, retained samples and overfill.
Are rejects and retained samples losses? They are poured candles that are not boxed. Count them separately so they stop looking like missing wax.
What if much is still unexplained? Check the input next: weigh back the oil and verify the wax scale with a reference object.
First, check the number you expected
Many 'missing candle' investigations end at the first line of arithmetic. If you melted 25 kg of wax and then added fragrance at 8% of total weight, the batch was not 25 kg. The oil for 25 kg of wax at 8% of total is 25 × 8 ÷ 92 = about 2.174 kg, so the scented batch was roughly 27.174 kg, which is about 135 candles of 200 g before any losses. If someone on the team expected 125 candles, they forgot the oil and you are actually ahead.
If instead the expectation was 135 and you boxed fewer, the gap is real. In the example used on this page, a maker using CSI 464 and Roasted Coffee boxed 121 saleable candles from that batch. That is 14 fewer than theory and a yield of about 89% (121 ÷ 135.87). Somewhere between the melter and the carton, roughly 2.6 kg of scented wax went somewhere other than a saleable candle.
Check the equipment arithmetic too. CSI's 10 kg Electric Wax Melter states 9.5 litres per melt, roughly 8.5 kg of melted soy wax at about 0.9 g per ml, so 27 kg of scented wax in that melter means at least four separate melts. Each melt leaves its own heel and film, each refill of the pitchers starts a fresh coat, and each changeover invites a drip. Four melts do not lose four times as much as one, but they lose noticeably more than a single vessel would.
The difference from a simple pouring shortfall is scale. A 25 kg run passes through many more stages, hands and hours than a 1 kg test. The loss is rarely in one place. It is spread across the process in amounts that are each unremarkable and together cost a box of candles.
A stage-by-stage map of where process loss hides
Walk the batch from carton to carton. At each stage ask two questions: does material leave the batch here, and does anyone record it?
| Stage | Typical loss | Usually recorded? | Recoverable? |
|---|---|---|---|
| Melting | Wax film and heel left in the melter | Rarely | Yes, same fragrance |
| Oil addition and mixing | Oil left in the weighing jug; wax on stirrers | Rarely | Partly |
| Transfer | Film inside each pitcher; drips between melter and bench | No | Yes, if scraped |
| Pouring | Funnel and nozzle residue; spills on bench and floor | Sometimes | Bench spills only |
| Top-up | Wax set aside for second pours that solidifies unused | Almost never | Yes, same fragrance |
| Quality control | Rejected candles: cracks, wet spots, off-centre wicks | Often, as a count | Wax yes; jars and wicks usually no |
| Retained samples | Candles kept back for burn testing and reference | Should be | No; they are planned |
| Fill | Candles filled above target weight | Rarely | No; it ships in the jars |
| Packing | Breakage or damage after filling | Sometimes | Wax sometimes |
Notice the pattern in the 'recorded' column. The largest losses often sit in stages nobody writes down, because each one feels too small to bother with during a busy pouring session.
Reconcile the batch, stage by stage
To find out where your 2.6 kg went, weigh each category rather than estimating it. Weigh vessels with their film on and subtract their empty weights. Weigh the reserved top-up jug. Weigh the rejects and the retained candles. Sample fill weights from across the run. Then line it all up:
| Where it ended up | How measured | Grams |
|---|---|---|
| 121 saleable candles at measured average 203 g | Sample of candles across the run, empty jar weights from the same lot | 24,563 |
| 4 rejected candles | Weighed net | 812 |
| 2 retained samples | Weighed net | 406 |
| Unused top-up wax, set in a jug | Weighed | 550 |
| Melter film and heel | Scraped and weighed | 300 |
| Spills recovered from bench and floor | Scraped and weighed | 230 |
| Pitchers | Weighed minus empty weight | 120 |
| Funnel and nozzles | Weighed minus empty weight | 40 |
| Oil jug and stirrers | Weighed minus empty weight | 30 |
| Unexplained | Input minus all of the above | about 123 |
The story changes completely once the numbers are in front of you. Six of the 14 'missing' candles were poured and exist as rejects or retained samples. The top-up reserve alone was worth almost three candles. The overfill of 3 g per candle, across 121 candles, adds up to 363 g, close to two more candles. Only about 123 g, well under half a percent of the batch, cannot be traced.
If your own unexplained line is large, perhaps more than a few hundred grams on a batch this size, the next place to look is the input: an oil weigh-back and a reference check on the wax scale. Until those two are confirmed, do not assume the rest of the process is at fault.
What to do with each category
Hot wax burns are the main hazard while scraping melters and pitchers. Let equipment cool to a safe handling temperature, switch the melter off at the wall, and never scrape a vessel that is still on its heating element. Large melters draw significant electrical load; check the circuit is suited to them before running two at once.
What the missing candles cost and how to stop losing them
Take the material cost of one 200 g candle at 8%. With CSI 464 at ₹507.40 per kg, 184 g of wax is about ₹93.36 (0.184 × ₹507.40). With Roasted Coffee at ₹3,738.00 per kg, 16 g of oil is about ₹59.81 (0.016 × ₹3,738.00). Together that is about ₹153.17 per candle before jar, wick and label. Fourteen candles is about ₹2,144.38 (14 × ₹153.17) of wax and oil, per batch, much of which was recoverable. The four rejects also consumed four ready-made wicks at ₹12.00 each, ₹48.00, plus their jars.
The fix is a yield line on every batch sheet: theoretical candles, poured candles, rejects, retained samples, saleable candles, and the weighed residue from each stage. Run it for three batches and you will see which stage dominates your losses. In the example above the priorities are obvious: size the top-up reserve to what is actually needed, tighten fill weights, and investigate the rejects.
Two process controls, both suggested starting points to validate, tend to recover the most. First, set the top-up reserve at a fixed weight based on how much you actually used in the previous three batches, rather than a generous guess. Second, sample fill weights at the start, middle and end of every run, not just the first few jars, because overfill usually creeps in as pourers get tired or the wax thickens.
Once the yield line is routine, a batch that misses expectations explains itself within minutes. For wax beyond the listed 10 kg packs, or oil documents, CSI is on WhatsApp at +91 7397976926.
Where this page fits
CSI already has guides that cover parts of this question. This page covers the failure investigation for the question above; these go deeper on the rest:
Three things to buy for this job
| Option | Price | Status on the September 2026 pull |
|---|---|---|
| Funnel | ₹1,888.00 | In stock |
| Option | Price | Status on the September 2026 pull |
|---|---|---|
| 500 g | ₹260.00 | In stock |
| 1 kg | ₹507.40 | In stock |
| 5 kg | ₹2,537.00 | In stock |
| 10 kg | ₹5,074.00 | In stock |
| Option | Price | Status on the September 2026 pull |
|---|---|---|
| 15 g | ₹93.22 | In stock |
| 50 g | ₹230.00 | In stock |
| 100 g | ₹390.00 | In stock |
| 500 g | ₹1,890.00 | In stock |
| 1 kg | ₹3,738.00 | In stock |
CANDLEMAKINGSUPPLIESINDIA supplies raw materials and production equipment, not finished candles. This guide separates general process physics from what CSI's own product pages state, and labels every mixing time, temperature window, hold limit, loss allowance or sample count as a starting point for your own validation.
Prices are live CSI prices from September 2026; product pages are authoritative. Where a spec is not published — such as the scale's capacity or the thermometer's range — this guide says so rather than filling the gap.
For bulk quotes, GST invoicing, IFRA and MSDS documents, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- How Much Wax Should I Add as Production Allowance When Calculating a 500-Candle Batch to Account for Melter, Pitcher and Pouring Losses?
- My Fragrance Container Still Has Significant Oil Coating the Walls After I Pour It Into the Melter — Should Transfer Loss Be Included in Commercial Formulation Calculations?
- My Small Test Batch Uses a Spatula to Scrape Every Gram of Fragrance Into the Wax but Bulk Production Leaves More Material Behind — Can Transfer Loss Alter the Effective Fragrance Load?
- I’m Using Multiple Pouring Pitchers and Each Retains Some Wax — How Do I Calculate Realistic Production Yield Instead of Theoretical Yield?
- My Team Is Filling 200 g Candles but Actual Finished Weights Range From 192 g to 208 g — How Much Can Fill Variation Affect Customer Consistency and Production Costing?
- My Candle Fill Weight Is Correct While Hot but Differs After Cooling — Which Measurement Should My Production QC Standardise?
- I’m Producing 1,000 Candles and Small Weighing Errors Become Kilograms of Material — How Do I Establish Scale Checks Before Each Production Run?
- Should I Use Calibration Weights to Check Production Scales Before Making Large Candle Batches?
- How Do I Include Wax Spillage, Leftover Fragrance, Broken Jars and Rejected Candles When Calculating My Actual Production Cost?
- I Received an Order for 1,000 Candles — How Do I Calculate Raw Materials, Wastage, Production Time and My Final Quotation?
Customer reviews: The reviews at the top are genuine, published Judge.me reviews — Arzoo Vyas (5★, not recorded as verified); Jaya Sawlani (5★, verified); Tina Raha (4★, verified); Jinal Patel (5★, verified); Lalitha Jagan (5★, not recorded as verified); Arshad Shaikh (5★, verified). Names, ratings, dates and products as recorded by Judge.me.
Product facts (September 2026, CSI live store): Wax Pouring Funnel (with 4 nozzles): Funnel ₹1,888.00 — gravity pouring funnel with four nozzles. Luxury Soy Wax CSI 464 (flakes): 500 g ₹260.00, 1 kg ₹507.40, 5 kg ₹2,537.00, 10 kg ₹5,074.00 — 100% soy container wax in flakes · single pour · stated fragrance load up to 10% · stated shelf life 60 months (cool, dry storage). Roasted Coffee Fragrance Oil: 15 g ₹93.22, 50 g ₹230.00, 100 g ₹390.00, 500 g ₹1,890.00, 1 kg ₹3,738.00 — top fresh coffee beans, middle dark chocolate and espresso, base vanilla and caramel · flashpoint approximately 191–193°C · vanillin PRESENT in the vanilla/caramel base (percentage not published) — page says slight yellowing in white wax, cosmetic only · soy 6–10% (cure 48–72 h), paraffin 6–8%.
Assumptions: Fragrance load is a percentage of total candle weight (200 g = 184 g wax + 16 g oil at 8%; a 25 kg batch at 8% = 23 kg wax + 2 kg oil). Melted soy wax is taken as roughly 0.9 g per ml for volume conversions, so the melter's stated 9.5 litres is about 8.5 kg — weigh one real fill. Mixing times, temperature windows, hold limits, loss allowances and sample counts are suggested starting points to validate, not measured CSI data. Example logs and readings are illustrations. Prices and availability change — product pages are authoritative.