My Candle Has Perfect Glass Adhesion on One Side but Large Wet Spots on the Other — What Could Cause Uneven Wax Contraction?
शेयर करना
Is the wax at fault? Unlikely, and a one-sided pattern is the evidence. One pot of wax poured into one jar cannot be good on the east face and bad on the west. Asymmetry points at conditions, not at raw material.
How do I prove it? Mark four faces on the base of every jar, record which faces gap, then pour a second batch with half the jars rotated 180°. If the gaps follow the room, you have a draught or a surface problem. If they follow the mark on the jar, you have a jar or a handling problem.
And remember what the patch is. It is not wet. It is an air gap where the wax has contracted off the glass, and it looks dark because light reflects at two surfaces there instead of one.
Why a jar cools unevenly in the first place
Think about where the heat in a freshly poured jar actually goes. Some leaves upward from the open top surface. Some leaves downward through the base into whatever the jar is standing on. The rest leaves sideways through the glass into the air around it — and that sideways path is the one that differs from face to face. Air moving past a surface carries heat away far more effectively than still air does, which is why a draught on one side is such an efficient way to produce a one-sided defect.
Now add the things that sit next to a jar in a real workshop. A neighbouring jar, itself full of hot wax, is a warm object: a face pointing at it stays warmer for longer. A jar at the edge of a tray has one or two faces pointing at open air instead. A granite counter or a steel table takes heat out of the base quickly and unevenly if the jar is not sitting flat. An open window in October in Delhi, a pedestal fan in Chennai, a split-AC unit blowing across a shelf in Bengaluru — each of them is a direction, and the wax records it.
Here is the part worth internalising: soy keeps contracting after it looks set, so the face that cooled fastest is often not where the gap appears first — it is where the wax has had the least chance to settle against the glass before it hardened. That is ordinary material behaviour and it is as far as anybody can honestly take it, because no rate, coefficient or threshold temperature for this is published anywhere in CSI's range and this guide will not invent one. What you can do is treat the pattern as data and the room as the variable.
The four-face map and the score sheet
This is the whole method, and it costs a marker pen. Before you pour, write N on the base of each jar and then E, S and W clockwise from it. Keep every N pointing the same way on the tray — towards the window, the vent, the door, whatever your suspected source is. Then score each face separately after cooling. One jar becomes four observations, and a batch of twelve becomes forty-eight.
| Jar | Tray position | N (facing the fan) | E | S | W | Face score 0–3 each |
|---|---|---|---|---|---|---|
| 1 | Outer, corner | Large patch | Faint edge | Clean | Faint edge | 3 · 1 · 0 · 1 |
| 2 | Outer, corner | Large patch | Clean | Clean | Faint edge | 3 · 0 · 0 · 1 |
| 3 | Outer, edge | Two patches | Clean | Clean | Clean | 2 · 0 · 0 · 0 |
| 4 | Outer, edge | One patch | Faint edge | Clean | Clean | 2 · 1 · 0 · 0 |
| 5 | Inner, shielded | Faint edge | Clean | Clean | Clean | 1 · 0 · 0 · 0 |
| 6 | Inner, shielded | Clean | Clean | Clean | Clean | 0 · 0 · 0 · 0 |
| 7 | Outer, edge | One patch | Clean | Clean | Faint edge | 2 · 0 · 0 · 1 |
| 8 | Outer, corner | Large patch | Faint edge | Clean | Clean | 3 · 1 · 0 · 0 |
| Face totals | 16 | 3 | 0 | 3 | Scale: 0 clean · 1 faint edge · 2 one patch · 3 large or multiple |
Read the bottom row. A total of 16 on N against 3, 0 and 3 elsewhere is not a wax result — it is a direction. And notice the two inner jars: shielded on every side by their neighbours, they scored 1 and 0. That is the same information arriving by a second route. This example is a worked illustration of how to fill the sheet, not a published result: your own totals are the only ones that mean anything, because they describe your room.
Seven asymmetries, and the observation that separates them
Once you have a face map, you have a direction. The next question is what in that direction is responsible. Everything below is a candidate with a check, not a verdict — "could" and "check" are the only honest register for a defect with no published thresholds.
| Candidate | Expected face pattern | Other tell-tale signs | The check |
|---|---|---|---|
| Fan or AC draught | One face heavily loaded; the same face on most jars in the batch | Outer jars far worse than inner; worse on days the unit runs | Pour one batch with the unit off and one with it on, same pot, same day |
| Tray edge versus tray centre | Outer ring gapped, inner jars clean, regardless of which face | Corner jars worst because two faces are exposed | Log tray position for every jar; pour a batch with all jars spaced apart |
| Cold base surface | Patches concentrated low on one or two faces | Granite, steel or tile under the jars; a jar not sitting flat | Half the batch on the bare counter, half on a wooden board or folded cloth |
| Cold wall, window or doorway | One face, consistent across many batches, independent of the tray | Seasonal — appears in winter, fades in April | Move the cooling tray to the middle of the room and repeat the identical pour |
| Direct sun on one side | One face warmer, often less gapped, with the shaded face worse | Follows the time of day you pour | Pour the same batch in the morning and in the late afternoon |
| Handling while filling | Patches where a hand grips, repeating at the same height | Often small and sharply outlined rather than broad | Fill half the batch holding jars with a cloth or not at all, and clean the inner wall first |
| An off-centre wick | Gap biased to the side the wick leans away from | Also an uneven melt pool when burned, which is a safety matter | Measure wick position in the cooled candle; recentre and repeat |
A note on the jar itself. It is entirely possible for one vessel to differ from another in wall thickness, base flatness or shape, and for that to show up as a consistent one-face pattern — but nothing in CSI's container range publishes a glass thickness or an empty-jar weight, and only 18 of the 78 listed containers state a numeric diameter at all. The clear 200ml Salsa Glass Jar, for instance, states its 200 ml capacity and nothing about its dimensions. So you cannot argue from a published thermal property, because there is none. You can weigh ten empty jars yourself and see how much they vary, and you can rotate them — which is exactly what the next section does.
The 8-jar orientation test
This is the paired test that separates the room from the jar, and it is the only one that does. Everything is held constant — one pot of wax, one oil, one load, one wick size, one minute of pouring, one cooling location — and the single variable is which way each jar is facing. Four jars keep their N towards your suspected source. Four are turned so that N points directly away from it.
| Line | Packs bought | Pack price | Used in the test | Cost of what is used |
|---|---|---|---|---|
| Premium Coconut Soy CSI 468 | 1 kg + 500 g | ₹650 + ₹325 | 1,251.2 g | ₹813.28 |
| Cinnamon Vanilla Fragrance Oil | 100 gm + 15 gm | ₹483.80 + ₹106.20 | 108.8 g | ₹526.37 |
| 200ml Salsa Glass Jar | 2 × 5 Pcs | ₹401.20 | 8 jars | ₹320.96 |
| Eco Candle Wicks · Thick (C2) | 20 wicks | ₹188.80 | 8 wicks | ₹75.52 |
| Candle Wick Stickers | 1 sheet · 40 | ₹100 | 8 stickers | ₹20 |
| Materials consumed | 8 candles | ₹1,756.13 | ||
| Cart total | ₹2,255 | leftovers reusable | ₹219.52 per test candle |
What to buy for the orientation test
Three lines matter: the cheapest clear jar you can pour in volume, a wax with a tight stated pour window so your temperature is not a hidden variable, and a wax that states nothing at all for comparison. Each card shows every listed pack and the per-unit maths.
| Size | Price | Per piece |
|---|---|---|
| 5 Pcs | ₹200.60 | ₹40.12 |
| 50 Pcs | ₹1,475 | ₹29.50 |
| 100 Pcs | ₹2,950 | ₹29.50 |
| Size | Price | Per kg | 170g measured-fill jars @ 8% |
|---|---|---|---|
| 500 g | ₹325 | ₹650 | ≈3 |
| 1 kg | ₹650 | ₹650 | ≈6 |
| 5 kg | ₹3,185 | ₹637 | ≈31 |
| 10 kg | ₹6,370 | ₹637 | ≈63 |
| Size | Price | Per kg | 170g measured-fill jars @ 8% |
|---|---|---|---|
| 1 kg | ₹450 | ₹450 | ≈6 |
| 5 kg | ₹2,124 | ₹424.80 | ≈31 |
| 10 kg | ₹4,248 | ₹424.80 | ≈63 |
| 50 kg | ₹21,240 | ₹424.80 | ≈319 |
Does any of this survive at 500 jars a day?
The honest answer is: some of it does, and the parts that do are the free ones. Marking four faces on 500 jars is not going to happen. Spacing jars so none sits in a draught, and not cooling half a batch on a window ledge because the bench was full, absolutely will. Here is the realistic version, ordered by what it costs you in minutes rather than rupees.
| Control | 10 jars a day | 100 jars a day | 500 jars a day | Cost in labour |
|---|---|---|---|---|
| Mark four faces and score each one | Yes, every batch | On a sample of 8–12 jars per batch | Once a month as an audit, not per batch | Seconds per jar; the scoring is the slow part |
| Cool the whole batch in one place | Yes | Yes | Yes — this is the non-negotiable one | None, once the space is planned |
| Keep the tray out of any air stream | Yes | Yes | Yes — switch the unit off during cooling if you can | None |
| Space jars so no jar touches another | Trivial | Needs more bench or more trays | Becomes a floor-space decision | Space, not time |
| Insulate the base from stone or steel | A wooden board | Boards or trays per batch | Dedicated racking | Low once bought |
| Log tray position for every jar | Yes | Outer ring versus inner, not exact position | Outer ring only, as a sampled count | Moderate; simplify ruthlessly |
| Rotate half the batch 180° | Diagnostic only | Diagnostic only | Diagnostic only — never a production step | It is a test, not a process |
At the top of that table is the only rule that matters at volume: one batch, one cooling environment. Mixed cooling locations are the reason large runs look inconsistent, and they are also the reason a maker at scale cannot tell whether a new wax helped. Everything else on the list is a refinement you add when the first rule is already reliable. For the economics of what a cosmetic reject actually costs you per candle, that is the commercial end of this series; for the sequencing of every lever in cost order, start with the two-day timeline post.
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. A one-sided defect is the easiest symptom in this whole subject to sell a new wax against, and we are telling you that a one-sided defect is the strongest possible evidence that your wax is not the problem. A marker pen and a rearranged bench cost nothing. We would rather you kept pouring than replaced a 10 kg bag to fix a draught.
Every price and pack size on this page comes from live CSI stock in September 2026 and links to the product page, where current pricing always takes precedence. Specifications are quoted only where the page states them: CSI 468's 50–53°C melting point, 58–60°C pour temperature and up to 13% load, and the fact that its page and CSI 464's are the only two in the wax range that mention glass adhesion at all — as wording, with no figure, method or threshold behind it. Natural Soy Pearl Wax states none of those things and we say so. On containers, only 18 of CSI's 78 listed vessels publish a numeric diameter, none publishes a glass thickness or an empty-jar weight, and the clear 200ml Salsa jar states no dimensions — so every argument here rests on what the pages say plus measurements you take yourself. No contraction rate, coefficient, adhesion score or threshold temperature is published by CSI and none is invented here.
For help matching a wick to a jar you have measured, bulk pricing, GST invoicing, MSDS or IFRA documentation, message us on WhatsApp at +91 7397976926.
Frequently asked questions
Customer reviews: The five reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on their product pages. Names, star ratings, dates and products are as recorded by Judge.me; one longer review is shortened with an ellipsis and otherwise unedited.
Figures verified September 2026: Premium Coconut Soy Wax CSI 468 — 500 g ₹325, 1 kg ₹650, 5 kg ₹3,185 (₹637/kg), 10 kg ₹6,370 (₹637/kg); stated "Fragrance Load Up to 13%", "Melting Point 50°C – 53°C", "Pour Temperature 58°C – 60°C", "Formulated for excellent glass adhesion and a one-pour finish", "Rich, opaque appearance with minimal frosting", "Suitable for single-pour container applications". Natural Soy Pearl Wax — 1 kg ₹450, 5 kg ₹2,124 (₹424.80/kg), 10 kg ₹4,248, 50 kg ₹21,240; the page states only "Suitable for a variety of container types and candle designs" — no load, melt point, add or pour temperature, appearance or adhesion. Luxury Soy Wax CSI 464 — 1 kg ₹507.40, 10 kg ₹5,074; the only other CSI wax page that mentions glass adhesion. 200ml Salsa Glass Jar with 63mm Lug Cap — 5 Pcs ₹200.60 (₹40.12 each), 50 Pcs ₹1,475 and 100 Pcs ₹2,950 (₹29.50 each); the page states "The 200ml capacity provides ample space for crafting beautiful votive or single-wick candles" and no dimensions; 100 jars as five-packs ₹4,012 against ₹2,950 for the 100-pack, a difference of ₹1,062. Coloured Salsa jars' pages state "Pairs well with C2 Eco Wicks"; the clear jar's page does not. Cinnamon Vanilla — 15 gm ₹106.20, 50 gm ₹271.40, 100 gm ₹483.80 (₹4.838/g), 500 gm ₹2,301, 1 kg ₹4,554.80. Eco Candle Wicks Thick (C2) — 20 wicks ₹188.80 (₹9.44 each); the Thick (C2) 10-wick variant is currently sold out. Candle Wick Stickers 1 sheet of 40 ₹100 (₹2.50 each). Pen Thermometer ₹354. Planning assumptions, labelled: the 170 g fill used throughout is a weight the maker measures, not a published figure — the jar page states 200 ml, a volume, and this guide does not convert millilitres to grams. Fragrance load is calculated as a share of the finished candle, so a 170 g candle at 8% is 156.4 g of wax and 13.6 g of oil (CSI's wax pages that state a load phrase it as a percentage of total wax weight; both conventions exist and this page states which it uses). Wax cost per jar = 1 kg price ÷ 1,000 × 156.4 g: CSI 468 ₹0.65/g × 156.4 = ₹101.66; Natural Soy Pearl ₹0.45/g × 156.4 = ₹70.38. Test consumption: 1,251.2 g wax at ₹813.28, 108.8 g oil at ₹526.37, 8 jars at ₹320.96, 8 wicks at ₹75.52, 8 stickers at ₹20, total ₹1,756.13, or ₹219.52 per test candle; cart ₹2,255. One wick per single-wick candle. No contraction rate, coefficient, adhesion score or threshold temperature is published by CSI and none is stated here. Prices and availability change — the linked product pages are always authoritative.