What Does Flashpoint Mean When Making Candles

If you’ve ever looked at a bottle of fragrance oil from a supplier there’s a good possibility the flash point is noted on the side.

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Not eincredibly supplier labels the flash suggest so directly, however some of them execute.

The objective of this post is to break dvery own whether or not this temperature is somepoint you need to factor right into your candle making or not, but it’s much better if we start through a definition initially.

Many kind of fluids offer off vapors, which is the allude in time once the liquid starts turning right into a gas.

If you’ve ever before boiled water, you’ve viewed this behavior: vapor comes off the surconfront of the water and evaporates.

Vapors play a function in fragrance oil too!

Normally speaking, the warmer a liquid is the even more it wants to “release” vapors to the atmosphere, but cooler liquids hold their vapors much better.

The flash suggest is the temperature wright here a fluid (any fluid) offers off sufficient vapor that an open up flame can if it’s it quickly. Not a complete on consistent fire, yet a brief flash of light.

The only point that can ignite the vapor is a true ignition source, not just warm.

For example, submerging a fluid that is heated to it’s flash allude temperature in a super warm wax (as is the case with adding fragrance oil to wax) won’t ignite the oil, however lighting a enhance (an open up flame) over it will.

How does this influence candle making?

Two Schools of Thought

The first team believes flash points affect your scent throw:

“Adding fragrance oil to wax heated over the fragrance oil’s flash suggest will certainly degrade the fragrance, damaging the lighter notes and leading to a weaker hot throw.”

The second team believes the opposite:

“You deserve to add fragrance oil to wax at any kind of temperature, regardmuch less of the flash allude and also it won’t degrade your fragrance oil or negatively influence your scent throw.”

We’ll start by figuring out what causes fragrance oil to degrade.

How Does Fragrance Degrade?

Two major culprits: light and heat.

Light, or more particularly, the rays of energy hidden from our eyes, can damage bonds in fragrance.

Store them in darker areas to prevent this, however the total damage from light on fragrance is typically much much less than what heat reasons.

Sure, if you left a bottle of FO outside in an Arizona summer it would make an influence.

Leaving it in your workshop underneath lights? Likely not going to disrupt your procedure in any means.

Heat is another story.

Perfumers are quick to warn against the threats of subjecting fragrance to warmth, yet as soon as does temperature become a trouble through oils?

Fragrance oil loses scent with evaporation of notes.

Although each oil is a arsenal of facility compounds, eincredibly note in a fragrance has some level of volatility.

Remember the fragrance pyramid?


Top notes evaporate much quicker than base notes because they’re more volatile. Once they evapoprice, they’re gone.

Heat increases the evaporation procedure, interpretation if you raise the temperature of fragrance oil it will evapoprice faster than if you left it at room temperature.

The instrumental temperature connected through volatility is called the boiling point.

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When fluids reach their boiling allude, they evapoprice. In a fragrance, the individual components (optimal, middle, and also base notes) have actually different boiling points.

Higher volatility means lower boiling suggest. Lower volatility means better boiling allude.

In a very simplified explanation, fragrance won’t lose scent (degrade) till any kind of of the notes reach their boiling point.

Aobtain, this is streamlined exponentially, yet the soul of explaining it this way helps set the phase for exactly how flash allude impacts degradation.

Does the Flash Point Temperature Degrade Fragrance Oil?

Fragrance only degrades if notes evaporate or burn off bereason the compounds reach their boiling points.

Once fragrance reaches the flash point, it’s capable of having the surface easily ignite, but isn’t outright evaporating itself right into the environment.

Ignition has to come from an open up flame, not simply somepoint warm, and also the fire won’t remajor for even more than a couple of seconds (if it even lasts that long).

If the surconfront of a fragrance ignites, some of the scent will certainly literally burn off because it offers fuel for a short-lived flame.

Ssuggest warming a fragrance oil to the flash allude doesn’t produce mass-evaporation of the notes.

If the fragrance is elevated to the boiling point, then mass-evaporation would certainly take place and also many scent would leave the liquid.

But this usage case only applies to the fragrance oil by itself.

In candle making, fragrance oil is included to hot wax which creates a mixture. This suggests the effective properties of the blfinish aren’t those of wax OR of fragrance oil – the properties are a mixture of both.

ItemFlash PointBoiling Point
Fragrance Oil115°F – 200°F+(46°C – 93°C+)>200°F(>93°C)
Wax392°F – 464°F(200°C – 240°C)650°F – 720°F(343°C – 382°C)
Fragrance Oil + Wax365°F – 438°F(185°C – 226°C)605°F – 668°F(318°C – 353°C)

And since wax commonly takes up about 90% of blends, the properties will certainly persuade closer to the wax than fragrance oil.

Now, these are turbulent estimates. To really find out what happens under the hood you require 2 things that are hard to come by:

Full chemical makeup of the fragrance oil and waxDeep knowledge of organic chemistry

Which suggests there’s absolutely going to be question marks given that obtaining the second suggest is actually much easier than the first!

The suggest remains: you can safely include fragrance oil to hot wax, even if the temperature of the wax is higher than the fragrance oil’s flash allude. Why?

Flash point just matters when ignition occursDegradation happens when evaporation starts, which occurs at the boiling point (much greater than the FP temperature)The relevant properties for making candles are the mixture properties

Flash allude isn’t appropriate for making candles and also have to be ignored totally when considering what temperature to add fragrance to wax.

The main factor suppliers encompass it on their bottles is pertained to shipping (read more about that here).

In brief, airlines won’t move substances via particular chemical properties for safety factors.

Unless component of your procedure involves lighting a enhance over the surchallenge of the fragrance, you won’t shed any type of scent from those temperatures.

Some advice percolates the internet saying you have to include your fragrance much below 185°F (85°C) to stop scent loss (maintaining it listed below the FP).

Doing this have the right to be a security danger because stirring properly to blfinish the FO and also wax is harder at reduced temperatures.

Make certain to stir for at leastern two minutes, regardless of as soon as you include fragrance, to stop poorly blended candles.

When fragrance isn’t blended, it “pools” inside the candle, leaving pockets of FO with potential to catch fire in the time of use.