I Changed Jar Suppliers and Suddenly Developed Wet Spots — Should I Validate the New Container Before Changing My Wax Formulation?
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What does a jar change re-open? Adhesion, wick, pour routine and route behaviour. Oil, load and cure stay — see the retest matrix.
Could the new jar change my pour temperature? Yes. CSI's Clear 150 g jar states hot pour up to 85°C; CSI 464's page gives 80–90°C — so 80–85°C in that jar.
What does validation cost? ₹1,427.00 in CSI materials with your own wax, oil and wick, if the Clear 150 g jar is the new one. See the kit.
Validate the new container first. Here is why, and how
When wet spots appear straight after a jar-supplier change, the change is the prime suspect by timing alone. Your wax, oil, load and wick were approved together in the old jar; the new jar is the only new ingredient. A jar change can alter adhesion in several ways commonly cited in candle making: different glass mass and wall thickness, a different internal shape or diameter, a different inner surface or residue, and — very often overlooked — a different set of limits that quietly changes your routine. If the new jar has a lower stated hot-pour limit than your usual pour temperature, you are no longer pouring the way you used to, even if nobody wrote that down.
That last point is worth an example, because it can happen with our own jar. CSI's Clear Glass Jar with Golden Lid (150 gram) page states "safe for hot pour up to 85°C". Luxury Soy Wax CSI 464's page gives an 80–90°C melt/pour working range. If your old routine poured CSI 464 at, say, 88°C into a jar with no such limit, moving to this jar means pouring at 85°C or below — a different glass-meets-wax moment, and one of the first things commonly cited for adhesion changes. Nothing about the wax changed; the routine did. In this jar, CSI 464 pours are limited to 80–85°C, and we say so plainly.
So the right order is a short container validation, with your old jar as the control at every step: does the new jar fit the candle; does the wax grip it, as received and cleaned; does your routine fit inside its limits; does it burn like the old one; does it survive your storage and courier route. Change the formula only if the new jar fails with the routine corrected and the glass cleaned — and even then, compare that cost with going back to the old jar. This page works the example with CSI 464 and Gardenia at 8% — 12 g of oil and 138 g of wax per 150 g candle.
| Earlier approval | Status after a jar change | Why | Gate |
|---|---|---|---|
| Fragrance oil and load | KEEP | The oil and its grams per candle have not changed — unless the fill weight has | 1 |
| Fill weight per jar | CONFIRM | Same nominal size can hold a different weight; re-weigh a fill | 1 |
| Glass adhesion | REPEAT | Glass, shape and surface all touch the wax | 2 |
| Pour temperature and routine | CONFIRM — or NEW if the jar's limit is lower | The jar's stated hot-pour limit may cap your old pour | 3 |
| Wick size and burn | REPEAT | Internal diameter and glass change pool and heat | 4 |
| Cure time | KEEP | A wax property, not a jar property | — |
| Hot throw | CONFIRM | Pool and jar shape can change release in the room | 4 |
| Heat and courier behaviour | REPEAT | Glass and shape change how the candle cycles | 5 |
| Wax formulation | KEEP — until gates 2–5 say otherwise | The wax passed in the old jar | — |
Gate 1: does the new jar fit the candle?
Before any pour, measure. Weigh five empty jars of each kind. Fill one of each with water to your usual fill line and weigh it, then convert: solid soy wax is lighter than water, so a labelled approximate factor of about 0.86–0.90 g of wax per ml (it varies by wax, temperature and fill line) gives a first estimate, and one weighed test pour confirms it. CSI's Clear 150 g jar has a published fill of approximately 150 g — one of very few jars anywhere with a stated fill — so confirm that it matches the fill your recipe expects. If your old candle was 160 g and the new jar holds 150 g, the grams of oil per candle change with it, and so does your price per candle.
Then check the practical fit: does the lid close over your wick height; does your wick centring device sit on the new rim; does the label area match. These are not adhesion questions, but a jar that fails here wastes everything that follows. Measuring two jars of the same stated diameter gives a full measurement sheet — empty weight, inside diameter, rim wall, fill height — and explains how each figure can matter.
Gates 2 and 3: does the wax grip it, and does your routine fit it?
Pour three arms from one melt of your production wax lot: A — your old jar, as you always prepared it; B — the new jar, straight from its carton; C — the new jar after a controlled isopropyl-alcohol clean. All arms at one measured pour temperature that every jar allows. With CSI 464 in CSI's Clear 150 g jar, that means a reading inside the page's 80–90°C range and at or below the jar's stated 85°C — so the window is 80–85°C, and your old jar is poured at the same figure for this test. If you normally poured hotter, that is gate 3 being tested at the same time, deliberately: if the old jar also spots at the lower temperature, the routine change is your answer, not the glass.
| Jar | Jar | Prep | Pour °C (measured) | 48 h | 7 d | After cycle | 30 d | Fill weight g | Notes |
|---|---|---|---|---|---|---|---|---|---|
| A1…A3 | Old supplier | Your old routine | ___ | ___ | ___ | ___ | ___ | ___ | ___ |
| B1…B3 | New supplier | As received | ___ | ___ | ___ | ___ | ___ | ___ | ___ |
| C1…C3 | New supplier | IPA-cleaned, dried | ___ | ___ | ___ | ___ | ___ | ___ | ___ |
| Batch | Wax bag ___ | Oil bottle ___ | Old jar delivery ___ | New jar delivery ___ | Room ___ °C |
Write the pass rule before pouring. A working rule you might adopt: the new jar passes gate 2 if arm B or arm C is no worse than arm A at 7 days and after the cycle — no more than one of its three jars grading above A's worst. If C passes and B does not, the new jar is fine and needs a cleaning step; cleaning jars commercially without residue sets that up. If A spots too at this pour temperature, the routine change explains your spots and the jar is innocent — whether a hotter pour is the answer and finding a temperature that gives adhesion and good tops are the next posts. Three jars per arm is a screen; pour three more of each before a final decision if the arms are close.
Gates 4 and 5: does it burn the same, and survive the route?
A jar that passes adhesion can still fail the candle. A different internal diameter or wall changes the melt pool and how hot the glass gets, so the wick approved in the old jar is a CONFIRM at best. Burn three new-jar candles beside three old-jar candles from one melt, with the same wick from the same pack, in cycles of about 3–4 hours with full cool-down between (a commonly used cycle — a labelled working practice). Record pool diameter and depth, time to full pool, flame height, soot and mushrooming, and how the glass feels. CSI publishes no wick size for any jar and no numeric flame-height or jar-temperature limit; acceptance is "no worse than the old jar on every safety line, and within the jar supplier's guidance". A hotter jar or a bigger flame is never traded for anything.
Gate 5 reuses the adhesion jars. Put them through a temperature cycle that matches your own storeroom or courier route — logged with a cheap min/max thermometer or data logger in a real parcel. An example cycle is 8 hours warm and 16 hours at room temperature, three to five times, with the warm phase well below CSI 468's stated 50–53°C melting point and never presented as a storage specification. Then photograph again. A new jar that grips on the bench and lets go after a week on the road has failed. A simple temperature-cycle test and repeated heating and cooling cover the method.
The priced validation kit
The example assumes the new jar is CSI's Clear 150 g jar and your production wax and oil are CSI 464 and Gardenia. The old jars are yours. Grams follow CSI's load convention (oil = W × L) with a 5% pour-loss working allowance.
| Item | Need | Buy | Price | Skip if |
|---|---|---|---|---|
| Clear Glass Jar with Golden Lid (150 gram) (new jar) | 6 for gate 2 + 3 for gate 4 | 1 × pack of 10 (1 spare) | ₹944.00 | Your new jar is from another supplier |
| Your old jars | 3 for gate 2 + 3 for gate 4 | Retained carton | — | — |
| Luxury Soy Wax CSI 464 | 1,304.1 g (gate 2) | 1 × 1 kg + 1 × 500 g | ₹767.40 | You hold your production wax lot (better) |
| Gardenia | 113.4 g (gate 2) | 1 × 100 g + 1 × 15 g | ₹538.02 | You test your own oil (better) |
| Eco Candle Wicks Thin C1 | Your production wick, from one pack | 1 × 20 (10-pack out of stock) | ₹118.00 | You hold your production wick (better) |
| Wick stickers | 15 | 1 × sheet of 40 | ₹100.00 | You hold stickers |
| Isopropyl Alcohol Spray | Arm C, cleaned identically | 1 × 150 ml | ₹383.00 | You already hold it |
| Gate 4 top-up: wax and oil | 869.4 g wax + 75.6 g oil less gate-2 leftovers | 1 × 1 kg wax · 1 × 100 g oil | ₹940.40 | You use your production stock |
| Everything bought | ₹3,790.82 | |||
| With your own wax, oil and wick | ₹1,427.00 |
The pack of 20 Clear 150 g jars is listed at ₹1,888.00 — the same ₹94.40 a jar — but in limited stock, so confirm on WhatsApp before planning a production order around it. The wick line is an example: CSI publishes no wick size for this jar, which is exactly why gate 4 exists.
Validation against reformulation: the money
At production rates — CSI 464 at the 5 kg rate, Gardenia at the 1 kg rate, the Clear 150 g jar at ₹94.40 and an Eco Thin C1 at ₹5.90 as the example wick line — a 150 g candle in the new jar costs ₹222.31 in materials. The two responses to spots after a jar change cost very different amounts before a single candle is sold:
| Response | What it re-opens | Test jars | CSI materials | Outcome if it works |
|---|---|---|---|---|
| Validate the new jar (this page) | Adhesion, routine, wick and route — in one jar | 9 new + 6 old | ₹1,427.00 with your wax, oil and wick | Keep the formula; add a cleaning step or a routine change |
| Reformulate an example 6-SKU range in CSI 468 | Adhesion, wick, load, cure, throw, heat — every SKU | 42 | ₹9,175.00 (1 × 5 kg + 1 × 1 kg + 1 × 500 g CSI 468, jars, wicks) | A new formula — still to be proved in the new jar |
| Go back to the old jar | Nothing | 0 | ₹0 | The approved candle, unchanged |
The reformulation line is an example built on six SKUs, three adhesion and three burn jars each, and a three-jar control per pour day; your range will differ. It also costs more every month afterwards: CSI 468 is ₹637.00 a kilo at the 5 kg rate against ₹507.40 for CSI 464 — ₹17.88 more per 150 g candle. One SKU versus the whole collection and including development cost in a switching decision work through that arithmetic in depth.
The decision rule
Apply after each gate. Stop at the first line that is true.
| If this is true | It means | Do or buy |
|---|---|---|
| The old jar also spots at the new jar's pour temperature | The routine change caused it | No wax change. Decide whether the new jar's limit suits your routine — balance pour temperature and tops. |
| New jar clean once cleaned, spotted as received | Residue on the new glass | Add a fixed cleaning step; release the jar. |
| New jar as good as old, as received | The jar passes gate 2 | Go on to gates 4 and 5 before releasing. |
| New jar spots even when cleaned, at the same pour | The glass itself differs | Measure and compare the glass; test warmed glass; ask the supplier. |
| New jar fails gate 4 (pool, flame, heat) | The wick needs re-approval in this jar | Wick bracket in the new jar before any production. |
| New jar fails after correction, cleaning and warming | This jar does not suit this candle | Go back to the old jar — or, only now, a formula trial in the new jar. |
Release the new jar formally: a short record of the gates passed, the jar supplier and delivery, the pour temperature now in use, the cleaning step, the wick confirmed and the date. Pour the first production batch with ten jars photographed at 7 days before the rest are shipped. Then keep the habit — a small production test for every supplier change — even when the next jar arrives with identical dimensions.
The CSI products in this validation
| Pack | Price | Per jar |
|---|---|---|
| Pack of 10 | ₹944.00 | ₹94.40 |
| Pack of 20 | ₹1,888.00 | ₹94.40 |
| Pack | Price | Per kg | Candles at 138.0 g wax |
|---|---|---|---|
| 500 g | ₹260.00 | ₹520.00 | 3.62 |
| 1 kg | ₹507.40 | ₹507.40 | 7.25 |
| 5 kg | ₹2,537.00 | ₹507.40 | 36.23 |
| 10 kg | ₹5,074.00 | ₹507.40 | 72.46 |
| Pack | Price | Per gram | Candles at 12.0 g |
|---|---|---|---|
| 15 g | ₹105.02 | ₹7.00 | 1.25 |
| 50 g | ₹223.02 | ₹4.46 | 4.17 |
| 100 g | ₹433.00 | ₹4.33 | 8.33 |
| 500 g | ₹2,166.00 | ₹4.33 | 41.67 |
| 1 kg | ₹4,332.00 | ₹4.33 | 83.33 |
| Pack | Price | Per ml |
|---|---|---|
| 150 ml spray | ₹383.00 | ₹2.55 per ml |
| 1 litre | ₹520.00 | ₹0.52 per ml |
Where to go next
This post owns the validation of a new container. The glass-comparison post owns measuring and diagnosing two jars; the policy post owns making a small test standard for every supplier change; the thicker-glass post owns pour temperature in heavier jars; the shape post owns capacity-alike jars of different shape. The section hub covers the fragrance side if the jar is cleared.
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. This page uses our own jar as the example of a new container that can force a routine change, tells you when going back to your old supplier is the right outcome, and says plainly that CSI publishes no glass thickness, internal diameter, wick size or adhesion data for any jar.
Oil prices are CSI live pricing, pulled 24 September 2026, stock re-checked 7 October 2026. Luxury Soy Wax Chunks, CSI 464 and CSI 468 are CSI live pricing, re-checked 7 October 2026; Natural Soy Pearl was re-checked 1 October 2026. Jar, Isopropyl Alcohol Spray and jar-range prices are CSI live pricing, pulled 7 October 2026; wicks were re-checked 4 October 2026, including the Eco Thin C1 10-pack being out of stock. Every candle split, kit total, per-jar and per-candle figure on this page is arithmetic on those listed prices, shown to two decimals so you can check it.
Jar counts per arm, photo checkpoints, the scoring scale, glass-warming and temperature-cycle settings, fill weights for jars without a published fill, and the pour-loss allowance are labelled working practices or examples, not industry standards — no industry figure exists for an acceptable amount of wet spotting. The 88°C old pour temperature (inside CSI 464's page range), the six-SKU reformulation example and the wax-per-ml conversion are labelled examples. For help building a test kit, bulk quotes, GST invoicing, MSDS or IFRA documents, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- My Unscented Soy Candle Has Excellent Glass Adhesion but the Scented Version Develops Wet Spots — Can Fragrance Oil Change Wax Contraction?
- My Wax Works Beautifully in One Jar Supplier's Glass but Poorly in Another Jar with the Same Diameter — Can Glass Composition or Thickness Matter?
- Should Candle Jar Supplier Changes Trigger a Small Production Test Even if Dimensions Remain Identical?
- My New Jar Has Thicker Glass and the Wax Cools Differently — Should I Retest Pouring Temperature?
- My New Jar Has the Same Capacity but a Different Shape — Why Might Glass Adhesion Change?
- If One Fragrance Consistently Creates Poor Adhesion, Should I Change Its Load Rather than Changing Wax Across My Entire Collection?
- Should Every New Candle Vessel Receive a Small Adhesion Test Before I Buy Thousands of Jars?
- How Do I Clean Candle Jars Commercially Without Leaving Residues That Interfere with Wax Adhesion?
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 — Eco Candle Wicks, Premium Candle Wicking Needle and Bamboo Wick Holder. They are general product reviews, not assessments of the guidance set out here. Names, star ratings, dates and products are as recorded by Judge.me and wording is unedited. "Verified buyer" appears only on the three reviews Judge.me recorded as verified — Monika Deep, Subhankar Roy and Sneha Tamang; the reviews from Ashwini, LJ and Lalitha Jagan are published but not recorded as verified, and carry no badge.
Figures pulled 24 September – 7 October 2026: Oils — CSI live pricing, pulled 24 September 2026, stock re-checked 7 October 2026: Gardenia Fragrance Oil ₹105.02 / 15 g, ₹223.02 / 50 g, ₹433.00 / 100 g, ₹2,166.00 / 500 g, ₹4,332.00 / 1 kg. Waxes — CSI live pricing, re-checked 7 October 2026 (Natural Soy Pearl re-checked 1 October 2026): Luxury Soy Wax CSI 464 ₹260.00 / 500 g, ₹507.40 / 1 kg, ₹2,537.00 / 5 kg, ₹5,074.00 / 10 kg; Premium Coconut Soy Wax CSI 468 ₹325.00 / 500 g, ₹650.00 / 1 kg, ₹3,185.00 / 5 kg, ₹6,370.00 / 10 kg. Jars and jar-care items — CSI live pricing, pulled 7 October 2026: Clear Glass Jar with Golden Lid (150 gram) ₹944.00 / 10, ₹1,888.00 / 20 (pack of 20 in limited stock); Isopropyl Alcohol Spray ₹383.00 / 150 ml, ₹520.00 / 1 litre. Wicks re-checked 4 October 2026: Eco Candle Wicks Thin C1 ₹118.00 / 20, ₹295.00 / 50, ₹590.00 / 100, ₹2,950.00 / 500, ₹5,900.00 / 1,000 (₹5.90 each; 10-pack out of stock); Thick C2 ₹94.40 / 10 … ₹9,440.00 / 1,000 (₹9.44 each); Cotton Braided Wicks Ready Made ₹12.00 each at every pack; wick stickers ₹100.00 / 40. Wick Centering Device ₹118.00 / 5; Candle Making Weighing Scale ₹354.00; Pen Thermometer ₹354.00 (measures wax, not glass).
Non-price figures and assumptions: Load convention: fragrance load is a share of the finished candle (oil = W × L; wax = W × (1 − L)). Worked example: new jar = CSI Clear 150 g (published fill ~150 g; hot pour up to 85°C per page), CSI 464 (80–90°C per page) and Gardenia at 8% (12 g oil + 138 g wax). Example old pour 88°C. Working practices: 3 jars per arm, 5% pour loss, photo checkpoints at pour day, 48 hours, 7 days, after a temperature cycle and 30 days; burn cycles of about 3–4 hours with full cool-down; example route cycle 8 hours warm / 16 hours room for 3–5 cycles; wax-per-ml factor ~0.86–0.90 g/ml (approximate, confirm by a weighed pour). Reformulation example: 6 SKUs × (3 adhesion + 3 burn jars) + 3 controls per pour day = 42 jars. Production-rate costs use waxes at the 5 kg rate, the oil at the 1 kg rate, the jar at the pack rate and Eco Thin C1 at ₹5.90 as the example wick line (wick size for this jar is not published). What CSI's product pages state (quoted as claims, not CSI test results): Luxury Soy Wax Chunks — fragrance load up to 13%, fragrance addition 80–90°C, pour 75–80°C in the spec table (the step list also shows 70–80°C), stir 2 minutes, cure at least 48 hours, ideally 1–2 weeks, and "excellent adhesion to glass and container surfaces reduces wet spots and pull-away"; Luxury Soy Wax CSI 464 — fragrance load up to 10%, an 80–90°C melt/pour working range, "excellent glass adhesion", single-pour, low frosting; Premium Coconut Soy Wax CSI 468 — melting point 50–53°C, pour 58–60°C, fragrance load up to 13%, "formulated for excellent glass adhesion and a one-pour finish"; Natural Soy Pearl — no fragrance ceiling, temperature, cure or adhesion statement published. All three adhesion claims are the same claim, so they rank nothing. Clear Glass Jar with Golden Lid (150 gram) — fill approximately 150 g, "safe for hot pour up to 85°C"; glass thickness not published. CSI publishes no adhesion, wet-spot, shrinkage or contraction data for any wax, oil, dye or jar; no glass thickness or internal diameter for any jar; no dye dose per kg; no wick size for any jar; and no industry acceptance threshold for wet spots exists — every acceptance line on this page is a labelled house standard the reader sets. Wet spots are described as commonly understood in candle making: areas where wax has separated from the glass, leaving a thin air gap that looks darker through clear glass. Material costs exclude labour, packaging, freight and GST. Diwali 2026 falls on Sunday 8 November.