My Production Batch Is Short by 500 g After Pouring — How Do I Distinguish Normal Vessel Loss From a Weighing or Fill-Weight Problem?
Aktie
How do I measure real fill weight? Sample about ten candles across the run and subtract empty jar weights measured on the same jar lot. Jars vary, so do not assume one figure.
What does a large unexplained remainder mean? If residue and fill are normal, suspect the input: check the scale with a reference object and weigh back the oil.
Can I reuse the residue? Yes, in the next batch of the same fragrance, counted as scented wax at 8% and labelled by fragrance and lot.
A 500 g gap has only three places to hide
You weighed in a 25 kg scented batch: 23 kg of wax and 2 kg of oil, planned for 125 candles of 200 g. After pouring you have 122 full candles and one part-filled jar holding about 100 g. At the nominal 200 g, that is 24.5 kg of candles. Half a kilogram has apparently gone.
Mass does not disappear in a candle workshop in any meaningful quantity. Soy wax does not lose significant weight on melting, and although some of the more volatile parts of the oil can evaporate during long holds at heat, that is not where 500 g goes. The gap sits in one of three places:
It helps to decide in advance what would count as proof for each suspect. Residue is proven by weighing the equipment. Overfill is proven by weighing individual candles against their own jars. An input error is proven only when the rest has been accounted for and a reference weighing shows the scale, the carton or the oil record to be wrong. Without that order, teams tend to blame whichever suspect they already believed in.
Spills, rejected candles and test pours that nobody recorded can add a fourth, smaller category. The job is to put a weight against each suspect, and the tool for that is a simple mass balance.
Build the mass balance for this batch
The principle is: what went in must equal what came out plus what was left behind. Weigh each part rather than estimating it.
Here is how the numbers came out for one example batch. Treat the residue figures as illustrative of what you might find, not as targets.
| Item | How measured | Grams |
|---|---|---|
| Input: 23 kg wax + 2 kg oil | Batch sheet, oil weigh-back confirmed | 25,000 |
| 122 candles at measured average 201.5 g net | Ten-candle sample against weighed empty jars | 24,583 |
| Part-filled jar | Weighed net | 100 |
| Melter film | Scraped and weighed | 160 |
| Two pitchers | Weighed with film minus empty weight | 70 |
| Funnel and nozzles | Weighed with film minus empty weight | 30 |
| Unexplained | Input minus everything above | 57 |
Read the table from the bottom. Only 57 g is unexplained, which is within what stirrers, drips and bench wipes can account for. Of the 500 g the maker thought was missing, 183 g is inside the candles as overfill (122 × 1.5 g) and 260 g is on the equipment. Nothing was lost to the scale; the batch was a normal batch with a small overfill habit.
What a genuine weighing problem looks like
Now run the same exercise on a batch that tells a different story. Same 25 kg plan, same 500 g apparent gap. This time the sampled candles average exactly 200 g net, the residue weighs 250 g, and 250 g is unexplained. That remainder is too big for drips and too consistent to be a spill nobody noticed.
The maker weighs an unopened 10 kg carton on the production scale, then on a second scale, and weighs a reference object weighed on a previous day. The production scale reads about 1% high. So the '23 kg' of wax was really about 22.77 kg, and the batch started around 230 g light before a drop was poured. Because the oil was weighed on a separate scale that checked out, the true load was about 8.07% rather than 8.00%.
| Finding | Points to | Next action |
|---|---|---|
| Residue close to the gap, fill average near target | Normal vessel loss | Recover residue; set your normal band |
| Fill average above target, residue modest | Overfill | Tighten fill checks; release candles |
| Fill and residue normal, large unexplained remainder | Input weighing | Check scale and oil weigh-back; review the load |
| Rejects or spills not on the sheet | Recording gap | Add fields to the batch sheet |
What to do with this batch
What 500 g costs and how to see it coming
Put a price on the gap. In Premium Coconut Soy Wax CSI 468 at ₹637.00 per kg (₹6,370.00 ÷ 10) and Jasmine at ₹3,923.00 per kg, 500 g of scented wax at 8% is 460 g of wax (0.46 × ₹637.00 = ₹293.02) and 40 g of oil (0.04 × ₹3,923.00 = ₹156.92): ₹449.94 per batch. Over 20 batches that is ₹8,998.80 (20 × ₹449.94). The equipment residue is the most recoverable part of that figure; the overfill and any input error are pure loss.
For the next three batches, record the residue on each vessel and the ten-candle fill sample. Those three batches give you your own normal band for vessel loss, which is far more useful than any published percentage. As a suggested starting point to validate, many makers find the melter, pitchers and funnel together leave something in the region of 1–2% of a batch, with the rest of a 5% planning allowance covering rejects and spills. Your own weighings replace that estimate as soon as you have them.
Once you know your normal residue, a future shortfall becomes easy to read. If it is inside the band, it is vessel loss. If it is outside, look at fill and input weighing first. For wax quotes beyond the 10 kg packs, message CSI 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 |
|---|---|---|
| Large 600 ml | ₹708.00 | In stock |
| Small 150 ml | ₹354.00 | Out of stock |
| Option | Price | Status on the September 2026 pull |
|---|---|---|
| 500 g | ₹325.00 | In stock |
| 1 kg | ₹650.00 | In stock |
| 5 kg | ₹3,185.00 | In stock |
| 10 kg | ₹6,370.00 | In stock |
| Option | Price | Status on the September 2026 pull |
|---|---|---|
| 15 g | ₹103.00 | In stock |
| 50 g | ₹230.00 | In stock |
| 100 g | ₹430.00 | In stock |
| 500 g | ₹1,961.00 | In stock |
| 1 kg | ₹3,923.00 | 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
- I Need to Fill 500 Candle Jars to the Same Level — Should I Standardise by Visual Fill Line, Volume or Actual Finished Weight?
- I Melted 25 Kg of Wax but Cannot Account for the Expected Number of Finished Candles — Where Should I Look for Process Loss?
- 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?
- How Do I Include Wax Spillage, Leftover Fragrance, Broken Jars and Rejected Candles When Calculating My Actual Production Cost?
- How Many Candles Can I Make With 10 Kg of Soy Wax?
Customer reviews: The reviews at the top are genuine, published Judge.me reviews — Kaushiki Satarkar (5★, verified); Tanya Walia (5★, verified); Subhankar Roy (4★, verified); Arminder Kaur (5★, verified); Arminder Kaur (5★, verified); Avanthi Cheeli (5★, verified). Names, ratings, dates and products as recorded by Judge.me.
Product facts (September 2026, CSI live store): Steel Pouring Pitcher: Large 600 ml ₹708.00, Small 150 ml ₹354.00 (out of stock) — stainless steel · 600 ml size 12 × 13 cm. Premium Coconut Soy Wax CSI 468 (flakes): 500 g ₹325.00, 1 kg ₹650.00, 5 kg ₹3,185.00, 10 kg ₹6,370.00 — coconut-soy blend · stated melt point 50–53°C, pour 58–60°C · stated fragrance load up to 13% · stated shelf life 60 months. Jasmine Fragrance Oil: 15 g ₹103.00, 50 g ₹230.00, 100 g ₹430.00, 500 g ₹1,961.00, 1 kg ₹3,923.00 — flashpoint 185°C · 0% vanillin · up to 10% soy, up to 6% paraffin.
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.