My Customers Ask for Stronger Candles so I’m Considering Larger Wicks — Why Should I Optimise Fragrance Diffusion Separately Instead of Intentionally Over-Wicking?

What customers mean by "stronger"

Before deciding anything, find out what the complaint describes. "I can't smell it" from someone burning a 150 g candle in an open-plan living room with the ceiling fan on is a different problem from "it smelled lovely for a week, now nothing" or "my friend's candle fills the house". Ask four questions: how big is the room, is a fan or AC running, how long do they burn it per session, and how long have they lived with it. Ceiling fans and AC both spread and dilute scent (commonly), and people stop noticing a smell they live with: olfactory adaptation is well established, which is why the candle often smells strongest to visitors.

Then check your own candle with the same honesty. Does it reach a full pool to the glass by the second or third burn, with a calm flame in the 2.5–5 cm range many makers use? If it tunnels, the pool is too small to release much scent, and the wick genuinely needs attention: that is a burn problem, solved by bracketing (start at the wick-matrix hub), not a strength problem. If the burn is right and the room is the issue, the fix is a product decision. If the burn is right and the room is small, now you have a scent problem worth working on. A candle with a perfect pool and little room fill is the subject of the 7 cm perfect-pool post.

Why a bigger wick is the expensive cheap fix

Hot throw comes from fragrance evaporating from the heated melt pool. A bigger flame heats more wax faster and can deepen the pool, so it does release scent faster for a while, but it does so by consuming the candle faster, not by making the oil work better. That is why this series measures throw per gram burned: if a configuration smells stronger only because it burns more wax, the gain is heat, not diffusion. The method is the throw-per-gram post; the checklist that voids a throw result when the burn fails is the masking checklist.

The costs arrive later in the candle's life, which is why they are easy to miss in a quick test. Over-wicking is commonly linked to a flame above the practical range, carbon build-up on the wick (mushrooming), soot on the glass, a deep pool late in the candle, and the flame and heat getting closer to the glass in the final third. It also shortens the life your customer paid for. In our worked example the 150 g candle has 121.9 g of wax above a 1 cm stop; at 5 g an hour on C1 that is about 24.4 hours, and if C2 burned 6 g an hour it would be about 20.3, 17% fewer hours (illustrative rates; weigh yours). A customer who said "weak" may now say "soot" and "didn't last".

The strength roadmap, ranked by rupees per candle

Our worked example is a 150 g candle in CSI's Clear Glass Jar with Golden Lid (150 gram), Luxury Soy Wax CSI 464, Lemongrass and Lime at 8% on an approved Eco C1. At production prices (1 kg oil, 10 kg wax) its materials are ₹62.40 of oil, ₹70.02 of wax, ₹94.40 of jar and ₹5.90 of wick: ₹232.72. Every figure below is the change from that, excluding labour, freight, packaging and GST.

The cure is free and often overlooked: Bergamot Amber's page itself states "cure 48-72 hours", while many makers find soy candles keep improving to day 7 or 14 (common practice, not a rule). The oil swap is nearly free at production prices, but it changes the product. The load steps cost real money per candle and stop at the lower of two ceilings: Lemongrass and Lime's page states 6–10% and CSI 464's states "up to 10%", so 10% is the edge on CSI's convention, and 9% satisfies both readings of the wax ceiling. Moving a whole collection up a load is the 8% to 10% requalification plan; finding the lowest load that still throws well is the lowest-effective-load method.

The wider jar is the lever that most directly answers "it doesn't fill my living room", because pool area is the melting surface the candle offers. It is also the one that is not really a lever at all: a 500 g, two-wick candle is a different product at a different price, with its own wick bracket. Offer it alongside the 150 g, not instead of fixing it.

Running the roadmap: one lever at a time

Each step is a single-variable test with the approved wick held still. If a step changes the burn (a smaller or sootier flame at a higher load, a slower edge with a heavier oil), stop and re-check the wick for that new candle; that is a consequence of the lever, not a lever itself. How a flame can shrink as load rises is the 6% to 10% flame-height ladder.

Talking to customers about room size

A candle releases scent into a volume of air, and rooms differ more than candles do. In our worked example a 10 m² bedroom with a 3 m ceiling holds 30 m³ of air; a 25 m² living room holds 75 m³, 2.5 times as much, and often has a fan turning and a door open. The same 150 g candle will feel different in each, and no honest supplier can give you a figure for how big a room a candle "fills": CSI publishes no such data and neither do we. What you can do is set expectations and match products to rooms.

None of this is a health claim or a performance promise; it is information that helps customers use the candle they bought. It also gives you better complaint data. If most "weak" reports come from big rooms with fans, the roadmap's answer is a product line, and the 214.55-times pool of a 10 cm two-wick candle is the honest way to offer more room fill, launched through its own wick bracket. Many makers find the same thing that the smells-weak-when-burning post works through: the oil is rarely the first problem.

Sixteen candles, costed

Sixteen candles answer three questions: whether time, oil quantity or oil choice moves your customers' complaint. A wick-up "test" would answer none of them, because any extra scent would be inseparable from extra heat. If you already hold the oil, wax and jars, the cash is only the Bergamot Amber bottle and a wick pack.

What to buy, and what to skip

Four items, chosen on page statements, price and stock on 29 September 2026. CSI has no measured throw or wick-performance data, so nothing is ranked on burn or scent results. Candle counts in the oil tables use 12 g (8%) and 15 g (10%) per 150 g candle.

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