One Fragrance Has Great Hot Throw and Another Is Weak in the Same Wax — What Should I Change?

First, make it a fair fight

You have already done the most useful thing a candle maker can do by accident: you have proved your system can throw. That is worth protecting, because it narrows the problem to one oil in one set of conditions. Before you change that oil, make sure the comparison that convicted it was fair. The questions are all about oil B versus oil A, not about the oil in general.

Is it actually the fragrance oil?

A fair repeat has three outcomes. If B is now close to A, the first test was unfair and there is nothing to buy. If B is still clearly weaker and its pool is visibly smaller, the oil is changing how the candle burns, which is a wick question before it is an oil question. If B is weaker with a pool as full as A's, the oil itself is the more likely cause, but even then the cheaper lever (load within its ceiling) comes before replacement. The general "is it the oil?" triage for a single weak candle is in the weak-hot-throw hub; here you have an advantage that post does not assume: a proven strong oil in the same system.

Change 1: the wick, for the weak oil only

Oils are not neutral passengers in the wax. Heavy, dense or base-led oils, and some sweet gourmands and fruity blends with vanilla, often give a smaller or shallower pool than a light or balanced oil on the same wick. That is a tendency, not a law, and it varies by oil and wax. It is also the cheapest thing to test. Light B, and at hours 1, 2, 3 and 4 note pool width (ruler across the top) and depth (a wooden skewer against the ruler). Do the same for A on another evening. A commonly cited rule of thumb is a full pool to the jar edge within about 3 to 4 hours on a first burn, and a pool roughly 0.5 to 1 cm deep; it is a guide, not CSI data, so compare B with A in your own jar.

If B wins on C2 and A is happy on C1, you now have two wicks in your range. That is not a failure of the formula; it is the formula working as a house base with one exception. A C2 costs ₹3.54 more per candle than a C1, which across 100 candles of B is ₹354.00. The wider question of whether every scent needs its own wick is taken up in Do Different Fragrance Oils Require Different Wick Sizes in the Same Jar?, and the house-base-plus-exceptions structure for a whole range is in the hub for this cluster.

Change 2: the load, inside the weak oil's own ceiling

If B has a full pool and is still quieter than A, the next lever is B's load, and the limit is set by two pages. The lower of the oil page's stated candle maximum and the wax page's stated maximum governs. Luxury Soy Wax CSI 464 states up to 10%; Luxury Soy Wax Chunks and Premium Coconut Soy Wax CSI 468 state up to 13%. These are formulation limits, not regulatory ones, and the maximum is not the best load. Past what the wax holds, extra oil tends to sweat or pool rather than throw, and more oil does not raise throw in proportion.

In a 150 g candle each point is 1.5 g of oil: 8% is 12 g, 9% is 13.5 g, 10% is 15 g. Raise B one point, pour it beside a fresh B at the old load, and judge both at day 7 and 14. If one point makes no noticeable difference in a full pool, a second point rarely rescues the oil, and at 9% on a page that stops at 9% there is no second point to try. What happens when 8% to 10% changes nothing is covered in I Increased Fragrance Oil From 8% to 10% but Hot Throw Didn't Improve — Why?.

Change 3: replace the weak oil, and how to choose the replacement

At this point you have evidence rather than a hunch: same wax, same jar, the right wick for B, B at its own ceiling, and A still clearly stronger at the doorway on the same cure day. Replacing B is now a sound decision. The way you replace it matters as much as the decision.

Three rules for a replacement

Same family. The slot in your range exists because customers want that kind of scent. A fruity slot should get a fruity replacement, so the range keeps its shape. Room above 8%. Prefer a page whose stated window reaches 10%, so the replacement has two points of headroom in CSI 464, not one. A named base. A pyramid that names something at the base, such as musk, woods or vanilla, is at least a sign the oil is built to last in the pool; it is a tendency, not a promise. Buy 50 g, not 1 kg, and pour it beside A exactly as you poured B.

On the three rules, Peach Melon Berry is our first candidate: a stated window reaching 10%, a named base, and strawberry in its heart. Wild Berries also states 8–10%, but its "Extremely strong hot throw" is the page's own claim, not a CSI measurement, and it costs more per gram at every size. Honeydew Melon and Orchard Pear are less expensive at 1 kg but state no candle load, so you would work inside the wax ceiling without an oil-side figure. All sizes of all four are in stock on 25 September 2026. Two pricing facts: Wild Berries' 1 kg is ₹6.00 per gram against ₹5.99 at 100 g, and Honeydew Melon's 100 g is ₹4.35 per gram against ₹4.34 at 50 g, so buying bigger saves nothing on those sizes.

The replacement must pass the same fair fight: poured beside A, same jar, same cure day, one candle per evening. A new oil that has not been through that is not a replacement yet; it is a second suspect. How to approve any new oil before it joins the range is in Should I Approve Every New Fragrance Oil Through a Separate Burn Test?.

What to leave alone: the wax, the house load and the strong oil

Makers often reach for the biggest lever first: a new wax, a higher load for everything, a hotter wick across the range. Each of those changes A as well as B, and A is working. It also throws away your control: if you change the wax and B improves, you no longer know whether A still performs, and you have added a second variable to every other scent in the range.

If you find that most scents in your range need the change you are making for B, the change belongs in the house base, and the order for wax, wick and oil changes across a whole system is in Should I Change My Wax, Wick or Fragrance Oil to Improve Hot Throw?. With one strong and one weak, that is rarely the case.

The five-candle test, poured beside your strong oil

This plan runs all three changes at once, each against the same control, so you get your answer in one cure cycle instead of three. It assumes the fair-fight checks above are done. All candles are 150 g in your house wax and jar; the worked example uses Fresh Strawberries as B, Lavender as A and Peach Melon Berry as the replacement, but any strong/weak pair works the same way.

Oil: 37.5 g of B, 12 g of A and 12 g of the replacement. Wax: 688.5 g. Wicks: four C1 and one C2. If you would rather not buy a replacement until changes 1 and 2 have spoken, pour only A, B1, B2 and B3, and add R in a second round.

Figures exclude labour, freight, packaging and GST.

What to buy: one wick pack, then oils only if needed

In the order the decision tree uses them. The wick pack is the likely fix. Fresh Strawberries is the worked example of the headroom limit; Peach Melon Berry is the replacement we would test first for a fruity slot; Lavender is the reference if you have no strong oil to act as A. Oils are chosen on stated load window, notes structure, price per gram and stock at every size on 25 September 2026, not on throw, which CSI has not measured. Candle counts assume 150 g at 8%.

Fixing the weak slot before Valentine's Day, 14 February 2027

Fruity, floral and rose scents are a common shape for a Valentine's range, and a weak fruity slot is exactly the problem this post solves. Valentine's Day falls on 14 February 2027, 142 days after these prices were checked. That is enough for the five-candle test (14 days), a confirmation candle with the winning combination (another 14 days) and a cured production run in January, with room to spare for Diwali and Christmas orders in between. If B is replaced, a kilogram of Peach Melon Berry at 8% makes 83 candles of 150 g, at ₹50.13 of oil each. Replacing Fresh Strawberries with it adds ₹7.65 of oil per candle at the 1 kg price, ₹764.64 per 100 candles; price that into the SKU before you decide. Dispatch times depend on your location; confirm on WhatsApp before you promise a date.

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