The first burn and the memory ring
The first time you light a candle decides how it burns for the rest of its life. Here is how long to burn it, why, and what to do if you got it wrong.
What the memory ring is
Wax has a kind of memory. When a candle burns, it melts a pool of wax around the wick. Next time you light it, the flame tends to melt down to that same width, and no further. Burn it too briefly the first time and the candle remembers a small circle, then digs a deeper and deeper hole with each burn. That hole is called tunneling, and it wastes wax and fragrance.
The good news is that the fix is simple: get the first burn right.
How long the first burn should be
The rule of thumb is about one hour for every 2.5 cm (1 inch) of candle diameter, or until the melt pool reaches the edge of the jar. For a typical jar candle that is 2 to 4 hours.
| Candle diameter | Approximate first burn |
|---|---|
| 5 cm (2 inches) | About 2 hours |
| 7.5 cm (3 inches) | About 3 hours |
| 10 cm (4 inches) | About 4 hours |
| Wider than 10 cm | Usually has several wicks; burn until the whole surface is liquid, but no more than 4 hours |
Do not go past about 4 hours in one session. Longer burns can overheat the jar, make the wick mushroom and create soot.
Step-by-step first burn
- Plan the first lighting for a time when you will be home and in the room for a few hours.
- Trim the wick to about 5 mm (1/4 inch). See trimming the wick.
- Place the candle on a level, heat-resistant surface, away from drafts.
- Light the wick at its base, not just the tip.
- Let it burn until the melt pool reaches the edge of the container, or close to it.
- Extinguish with a snuffer or by gently blowing, and let the wax set completely before moving it.
Every burn after that
The memory ring keeps working throughout the candle's life, so treat every session like a smaller version of the first one. Try to let the pool reach the edge each time. If you only have half an hour, it is better to choose a smaller candle, such as a tealight, than to light your big jar briefly.
Signs it went right
- The surface sets flat and even after the candle cools.
- Little or no wax is left clinging to the sides of the jar.
- The candle smells strong when lit, because a wide pool releases more scent.
Signs it went wrong
- A deep hole forms around the wick.
- A thick ring of hard wax stays on the sides.
- The flame gets smaller and weaker as it sinks into the hole.
If you see these signs early, the fixing tunneling guide shows how to rescue the candle.
Never leave a burning candle unattended, even during a long first burn. Keep it out of reach of children and pets and away from anything that can catch fire.