The candle pour temperature we use is 135F. Here is what that number controls and what happens when soy 464 is poured hotter or colder.
The candle pour temperature we use is 135F. Not 140F. Not 130F. Not "when the wax looks cloudy." A specific number, measured with a calibrated probe thermometer, verified before every pour. This post explains why 135F is the standard, what each degree above and below it changes, and what this single variable controls in the finished candle.
What Pour Temperature Actually Means
Pour temperature is the wax temperature at the moment it enters the vessel. It is not the temperature at which fragrance is added. It is not the temperature at which the wax was first melted. It is the final, controlled temperature of the wax-and-fragrance mixture as it leaves the pouring pitcher.
The distinction matters because the soy candle making temperature has three separate stages. The wax is heated to 185F to melt fully and to receive fragrance oil. Fragrance is added at 185F and stirred for two minutes. The mixture is then cooled to the target pour temperature. That third number is what determines how the candle looks, how it smells, and how it performs.
For Golden Brands 464 soy wax, the wax we use, the manufacturer's recommended pour range is 135F. That number is not a guess. It is the tested point where the physical and chemical behaviors of soy 464 produce a stable candle.
The 135F Decision
We tested pour temperatures from 120F to 160F across multiple candles in the same vessel, with the same fragrance, the same wick, and the same cure schedule. The only variable was pour temperature. We logged the surface finish, glass adhesion, fragrance throw at week two, and cold throw on the unlit candle.
The findings were consistent. At 135F, the wax bonded fully to the glass walls. The top surface set flat without sinkholes. The fragrance retained its top notes. The hot throw at week two was even across the burn.
Above 145F, surface defects appeared. Below 125F, glass adhesion failed. Inside that 10-degree window, 135F sat at the center of the cleanest results. That is why we hold to it.
The number alone is not the credential. The reason behind it is. We pour at 135F because every other number we tested produced a candle we would not ship.
What Happens Above 145F
Pouring soy 464 hot looks easier. The wax flows freely. There are no flecks, no cloudiness in the pitcher, no visual cues that tell you to wait. This is the trap.
At higher pour temperatures, two things go wrong.
The first is fragrance loss. Fragrance oils are volatile organic compounds with specific flashpoints, often between 140F and 200F. The lighter the top note, the lower the flashpoint. When you pour wax at 160F, you continue to volatilize the lightest molecules in the fragrance, which then evaporate before the wax sets. The candle smells weaker after cure than the same formula poured cooler. Top notes are the first casualty. The bergamot, the cardamom, the bright citrus accents become muted. What you smell on opening is no longer what you blended.
The second is structural. Soy wax shrinks as it cools. The hotter the pour, the more total contraction occurs after the wax enters the vessel. That contraction creates sinkholes around the wick, frosting on the surface, and air pockets between the wax and the glass. A candle with poor glass adhesion will pull away from the vessel during the first burn, exposing cold wax to the flame and reducing hot throw. Wet spots, the cloudy patches that appear on the inside of the glass, are a direct result of pouring too hot or too cold for the vessel temperature.
Hot pours look effortless in the pitcher. The cost is paid two weeks later, when the candle is opened and the scent is half of what it should be.
What Happens Below 125F
Pouring cold has the opposite failure mode. The wax sets too quickly to bond.
Soy 464 begins to crystallize around 120F to 125F. If the wax enters the vessel at that temperature or lower, it does not have time to spread evenly, fill the corners between the wick and the glass, or release trapped air. The result is a textured, uneven top surface. Sometimes a rough, almost crystalline finish. Sometimes a dimple around the wick. Sometimes the wax sets in visible layers if you pour in two passes.
Glass adhesion is the bigger problem. Wax bonds to the glass through a brief liquid contact phase. If the wax is too cool to flow against the cold glass walls, that contact phase is shortened, and the bond is weaker. The first burn reveals it. The wax detaches from the glass, melt pools form unevenly, and tunneling becomes likely from the start.
Cold pours also tend to produce inconsistent fragrance distribution. Fragrance oil is suspended in the wax matrix while the wax is liquid. As the wax thickens toward setting, the suspension can break, and the oil drifts to the surface or pools in low spots. Pouring at 135F gives the wax enough fluidity to keep fragrance evenly distributed through the entire vessel as it sets.
Why It Matters for Fragrance Retention
Fragrance retention is the single biggest reason why pour candles at 135F is the working standard for soy 464. The number controls how much of the original blend survives the production process and reaches the customer.
Fragrance throw is a function of three variables: load, cure, and pour. The 8% fragrance load sets the maximum amount of scent the wax can carry. The 14-day cure lets the fragrance bond evenly through the wax matrix. Pour temperature determines how much of the load survives to be cured at all.
Top notes are the most vulnerable. They are the lightest molecules in the blend, the ones designed to arrive first and create the opening impression. They are also the first to volatilize at elevated temperatures. A candle poured at 160F can lose 10 to 15 percent of its top-note volume to evaporation between the pitcher and the vessel. The base notes survive because they are heavier and bind to the wax sooner. What you end up with is a candle that opens flat and smells closer to its base than its full composition.
Pouring at 135F protects the top notes. The wax is cool enough that volatile compounds stay suspended. The fragrance load you blended is the fragrance load that cures. The candle opens with the same character it had in the pitcher.
The Pour Temperature Test
If you want to verify that pour temperature was controlled, the candle itself will tell you.
The top surface of a properly poured soy candle should be flat. Not domed. Not concave. Not cratered around the wick. A flat surface is a signal that the wax was poured within its working window and allowed to set without thermal shock. Run a finger across the surface. It should be smooth, not waxy or grainy.
The glass should be clear of wet spots. A small amount of frosting along the edges is normal in soy wax and not a defect. Large patches of cloudiness, or visible air gaps between the wax and the glass, indicate a pour temperature mismatch with the vessel.
The cold throw, the scent of the unlit candle, should be present and balanced. If it is faint, or weighted heavily toward base notes with no top brightness, the fragrance was likely compromised during pour or fragrance addition. The throw should not require the lid to be off for several minutes to register.
These are the visible and olfactory signals that the candle was made within tolerance. We check each candle against this short list before it ships.
WAX Soy GW 464
MELT TEMPERATURE 185F / 85C
FRAGRANCE ADDED AT 185F / 85C
STIR TIME 2 minutes
POUR TEMPERATURE 135F / 57C
WORKING WINDOW 125F to 145F
CURE TIME 14 days minimum
SET TIME 4 to 6 hours
Why This Number Is Permanent
Most production decisions are open to revision. New wax blends, new fragrance houses, new vessel suppliers. The specifications adjust to match. Pour temperature is one of the few that does not.
For soy 464, 135F is the manufacturer's recommendation, the candle industry's tested midpoint for the wax type, and the temperature our own testing converged on independently. CandleScience publishes the same number in their official guide to working with this wax. Three separate sources, one number. That convergence is why it sits on the Calibre Card of every candle we ship.
If we change wax types, the pour temperature will change. Coconut blends pour cooler. Paraffin pours hotter. We cover the differences in our soy vs paraffin candles post. But for as long as we use soy 464, the pour temperature is fixed at 135F. It is not a preference. It is the working specification of the material.
The customer never sees the pour. They see the result: a flat top surface, a candle that throws scent evenly from the first burn, a fragrance that opens the way the blend was designed to open. That outcome is built one degree at a time.
If you want to see the standard in finished form, BRASA was the first candle poured to this specification. The same number is on every candle we have produced since. To get the most out of any candle poured this way, burn it correctly from the first session forward.
ardeluz. Precision-craft candles. Montreal.