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If you've spent any time making candles, you've probably heard people talk about "hot throw."
It's one of the most common questions we get asked:
"How do I improve my hot throw?"
"Why does my candle smell strong cold but weak when burning?"
"Should I add more fragrance oil?"
Unfortunately, there is a lot of misinformation online about hot throw, and some of the most commonly repeated advice can actually make your candles perform worse rather than better.
Let's take a closer look at what hot throw really is, what affects it, and why getting a strong scent isn't always as simple as adding more fragrance.
Hot throw refers to the strength of a candle's fragrance while it is burning.
In simple terms, it is the amount of fragrance released into a room when the candle is lit.
A candle with excellent hot throw will fill a space with fragrance as it burns.
A candle with poor hot throw may smell fantastic in the jar but seem disappointing once the wick is lit.
Many candle makers confuse hot throw and cold throw.
Cold throw is how a candle smells when it is unlit.
This is the scent you notice when:
Removing the lid
Smelling the candle in the jar
Walking past an unlit candle
Hot throw is the fragrance released while the candle is actually burning.
A candle can have:
Strong cold throw and weak hot throw
Weak cold throw and excellent hot throw
Strong performance in both
One does not automatically guarantee the other.
Many people assume the flame somehow "burns" the fragrance into the room.
That isn't really what happens.
As the candle burns, the flame creates a melt pool of liquid wax.
Fragrance molecules trapped within that liquid wax are gradually released into the air as the wax warms.
The fragrance you smell is created by a combination of:
Wax type
Fragrance oil
Wick size
Melt pool temperature
Room conditions
All of these factors work together as a system.
Change one component and you change the entire system.
The most common misconception in candle making is:
"More fragrance oil equals stronger hot throw."
In reality, this is often completely false.
Once a wax reaches its practical fragrance saturation point, adding more oil can actually reduce performance.
Problems caused by excessive fragrance loading can include:
Oil seepage
Poor combustion
Wick drowning
Excessive mushrooming
Reduced burn quality
Weaker scent projection
We've seen countless candles loaded with fragrance at extremely high percentages that perform worse than properly balanced candles using less oil.
The goal isn't to use the most fragrance possible.
The goal is to create the most efficient fragrance release system.
The wick is often the most overlooked part of hot throw.
Think of the wick as the engine that drives fragrance release.
If the wick is too small:
Melt pool develops slowly
Wax doesn't get warm enough
Fragrance release is reduced
If the wick is too large:
Candle overheats
Fragrance notes burn off too quickly
Soot may increase
Burn quality suffers
This is why wick testing remains one of the most important parts of candle development.
Even changing between fragrance oils in the same jar can require a different wick.
Different waxes release fragrance differently.
Some waxes naturally provide:
Faster fragrance release
Stronger initial scent projection
Others provide:
More gradual release
Longer-lasting scent experience
For container candles, we generally find that a quality soy wax with excellent fragrance compatibility offers a good balance between performance, stability and burn quality.
A well-formulated candle using the correct wick and fragrance combination will almost always outperform a poorly balanced candle regardless of wax type.
One of the hardest things for new candle makers is waiting.
Freshly poured candles often haven't reached their full potential.
During curing:
Wax structure stabilises
Fragrance distributes more evenly
Scent performance often improves
Testing too soon can lead people to incorrectly assume a fragrance or wax is performing poorly.
Patience can sometimes be one of the simplest ways to improve results.
This surprises many beginners.
Two people can use:
The same wax
The same fragrance
The same wick
Yet achieve different hot throw results.
Why?
Because other variables still exist:
Pouring temperatures
Room temperatures
Cure times
Vessel design
Testing environment
Burn conditions
Candle making is both a science and an art.
Small changes can produce noticeably different outcomes.
If you're unhappy with your hot throw, we recommend investigating these areas first:
A wick that is too small or too large can dramatically affect fragrance performance.
More isn't always better.
Aim for balance rather than maximum loading.
Give your candle time to fully develop before testing.
Not all fragrance oils perform equally in every wax.
Change one variable at a time.
Making multiple changes simultaneously makes troubleshooting almost impossible.
Hot throw isn't created by a single ingredient.
It is the result of the entire candle system working together.
Wax, wick, fragrance, curing and burn conditions all play a role.
The strongest candles are rarely the ones with the highest fragrance load.
They're usually the candles that have been carefully tested, properly balanced and thoughtfully designed.
At Aussie Candle Supplies, we've spent decades helping candle makers troubleshoot scent throw issues, and one thing remains true:
Good candle making is rarely about shortcuts.
It's about understanding how each component contributes to the finished result and making informed decisions based on testing rather than myths.
And when it comes to hot throw, balance will almost always outperform excess.
