My 1 Kg Soy Wax Test Had Excellent Hot Throw but the Same Formula Made as a 20 Kg Batch Is Much Weaker — What Changed During Scaling?
Aktie
What is the first thing to check? Weigh the oil left in the bottle. If some of the 1.6 kg is still there, the batch was short on oil and you have found a lead without burning anything.
Can I remelt the jars immediately? Hold them first. Rework destroys the evidence and adds another heat cycle. Diagnose, then decide.
Why must cure age match? A younger candle often throws less than an older one. Compare jars at the same age or the result is meaningless.
What “much weaker” can and cannot tell you
You made a 1 kg test in Luxury Soy Wax CSI 464 with Bergamot Amber at 8% of total weight, burned it, and the room filled. You then made the same formula as a 20 kg batch — 18.4 kg of wax and 1.6 kg of oil, one hundred 200 g jars — and the burn test on those jars is flat. That is a real and expensive problem, but the symptom on its own is narrower than it feels.
A weaker hot throw from the big batch can mean less oil reached the jars than the sheet says, that oil was lost or altered by heat before it was locked into the wax, that the oil was unevenly spread so the jars you tested happened to be lean, or that the burn itself differs (wick, jar, room, cure age). It cannot, by itself, tell you that the oil is bad or that the formula is wrong. The formula already worked once. Your job is to find which of those routes this batch took, using evidence you still have: the retained candles, the batch sheet, the leftover oil and a fresh control.
Do not start by ordering a stronger oil or raising the load. If the cause is heat or distribution, a higher load simply buys more oil and repeats the same loss.
Contain the batch before you diagnose it
Put all one hundred jars on hold — one shelf, one label, nothing sold, gifted or reworked yet. Rework destroys evidence, and a remelt changes the thermal history you are trying to read. Pull a small retained set: take two jars from the first ten poured, two from the middle and two from the last ten (six jars is a suggested starting point to validate, not a rule). Mark their pour order on the base.
Then gather the paper trail while memory is fresh. The batch sheet, the times you noted, the wax bag and oil bottle lot numbers, the melter setting you used, and — critically — the oil bottle itself. Weigh what is left in it. If you bought 1.6 kg and the bottle is empty, the full amount went in. If 180 g is still sitting there, you have found your first suspect without lighting anything.
The same-day side-by-side
The most useful single test is a fresh 1 kg control made today, beside the retained 20 kg jars, burned in the same room on the same day. A comparison that mixes a two-week-old test candle with a four-day-old production candle tells you almost nothing, because cure age alone can move hot throw.
Three outcomes are possible. If the fresh control is also weak, the problem travelled with the materials or the test conditions, not with the scale. If the control is strong and all six retained jars are weak, the big batch lost oil or intensity somewhere in its process. If the control is strong and the retained jars vary with pour order, you have a distribution or drift problem rather than a formula problem.
Variable-by-variable elimination
Once the side-by-side has told you which family you are in, work through the variables one at a time. Change nothing in production while you do this.
| Variable | 1 kg test | 20 kg batch | How to check | Cleared if |
|---|---|---|---|---|
| Oil actually added | 80 g on a scale | 1.6 kg planned | Weigh leftover oil; recheck sheet arithmetic | Bottle empty and 18.4 kg + 1.6 kg recorded |
| Load basis | 8% of total | Was it 8% of wax? | Recalculate from the sheet | Oil is 8% of the 20 kg total |
| Oil lot | Original bottle | New carton? | Compare lot numbers; smell both from strips | Same lot, or strips match |
| Addition temperature | Measured with thermometer | Read from melter display? | Sheet times and readings | Separate thermometer reading below flashpoint and in your window |
| Time hot after oil | Poured within minutes | Held while filling 100 jars | Sheet start and finish times | Hold time similar to the test |
| Mixing | Hand stir in a pitcher | Same stir in a big vessel? | Compare first, middle and last jars | No trend with pour order |
| Wick, jar, room | Test set-up | Same? | Wick lot, jar lot, burn room | All identical |
| Cure age at test | Often older | Often younger | Pour date vs burn date | Equal ages compared |
Tick a row only when evidence clears it, not when it seems unlikely. The row you cannot clear is where the next small test goes. If time hot after oil is the suspect, for example, make two more 1 kg controls: pour one immediately, hold the other at temperature in a covered pitcher for the time the big batch sat, then compare them at equal cure age. One change, one answer.
What to do with the hundred jars
Your disposition depends on what the elimination proved, and it should be written down before anything is sold.
The control that stops a repeat
Whatever the cause, the lasting fix is the same habit: every production batch carries a small reference beside it. Before the next 20 kg run, keep back enough oil and wax for a 1 kg control from the same lots, pour it on the same day, and burn it beside production at the same cure age. If the two diverge, you learn it at five jars rather than one hundred.
Add three fields to your batch sheet if they are missing: separate thermometer reading at oil addition, clock time at oil addition and at last pour, and leftover oil weight at the end. The melter display alone is not enough — the Electric Wax Melter page states a ±10°C deviation, so verify with a Pen Thermometer. Those three numbers would have answered most of this page in ten minutes.
If you want a second opinion on your batch sheet before remaking the run, send it to CSI on WhatsApp (+91 7397976926) with the lot numbers from the wax bag and oil bottle.
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 |
|---|---|---|
| Pen thermometer | ₹354.00 | 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 | ₹105.02 | In stock |
| 50 g | ₹280.00 | In stock |
| 100 g | ₹560.00 | In stock |
| 500 g | ₹2,718.00 | In stock |
| 1 kg | ₹5,437.00 | 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
- My 1 Kg Soy Candle Test Batch Has Excellent Hot Throw but the Same Formula Is Weaker When I Make 10 Kg — What Could Be Changing During Scale-Up?
- My New Coffee Fragrance Has Stronger Cold Throw but Weaker Hot Throw Than the Previous Lot — What Should I Compare Before Approving It?
- I Scaled My Candle Formula From 1 Kg to 10 Kg Using Exactly the Same Percentages — Why Does the Finished Candle Perform Differently?
- My 500 g Test Batch Was Perfect but My First 25 Kg Production Batch Has Weak Fragrance — Where Should I Start Troubleshooting?
- I Multiplied Every Ingredient in My 1 Kg Candle Formula by 25 — Why Doesn’t a 25 Kg Batch Automatically Behave Exactly the Same?
- My 2 Kg Test Batch Gives Great Cold and Hot Throw but My 20 Kg Production Batch Smells Noticeably Weaker — Could Mixing Be the Problem?
- My Small-Batch Candle Formula Uses 8% Fragrance Successfully but 8% in a 25 Kg Batch Gives Inconsistent Scent Between Candles — Why?
- I Used the Same Wax, Fragrance, Wick and Jars When Scaling From 1 Kg to 10 Kg — What Process Variables Could Still Make the Results Different?
- My Formula Worked When I Melted Wax in a Small Pitcher but Changed When I Started Using a Commercial Wax Melter — What Should I Investigate?
- My 1 Kg Batch Cools Quickly but My 20 Kg Wax Mass Stays Hot Much Longer — Can This Change Fragrance Addition and Finished Performance?
- My Small Test Batch Has Excellent Hot Throw but the 20 Kg Production Batch Smells Weaker — What Production Differences Should I Investigate Before Blaming the Fragrance Oil?
- How to Create Batch Sheets for Candle Manufacturing
Customer reviews: The reviews at the top are genuine, published Judge.me reviews — Sakshi Jain (5★, verified); Arzoo Vyas (5★, not recorded as verified); Manasa GN (5★, verified); Jaya Sawlani (5★, verified); S.A. (4★, not recorded as verified); PREETHI PRASATH (5★, verified). Names, ratings, dates and products as recorded by Judge.me.
Product facts (September 2026, CSI live store): Pen Thermometer: Pen thermometer ₹354.00 — range and accuracy not published. 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). Bergamot Amber Fragrance Oil: 15 g ₹105.02, 50 g ₹280.00, 100 g ₹560.00, 500 g ₹2,718.00, 1 kg ₹5,437.00 — top bergamot and citrus, heart amber with soft floral, base woody musk and vanilla · soy 6–10%, paraffin 6–8% · page intensity guide: 6% bergamot leads, 8% balanced, 10% amber comes forward and vanilla/musk base becomes more prominent.
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.