What Is a Melt Pool?

A melt pool is the liquid wax sitting round the flame. Fragrance throws from that liquid surface, not from the solid wax under it. If the pool is a small puddle in the middle, you get a weak smell and, over a few burns, a tunnel.

What “full pool” means

Liquid wax all the way to the glass, in a level disc, maybe 5–10mm deep. You do not need a soup. You do need the edges wet. On a new candle this can take an hour or more. Watch the edge, not the clock.

Once a candle has had a full pool, later burns can be shorter — the wax at the edge is already trained to melt. That is memory burn.

Too small

Tunnel. Wasted wax. Scent that never quite fills the room. Fix with a long burn and foil if the walls are already high — how we fix tunnelling.

Too big / too hot

If the whole jar is a rolling boil, the wick is oversized or you have a draught feeding the flame. Top notes cook. The glass gets too hot to hold. Soot. Blow it out, trim, relight. A calm pool is glossy, not bubbling like a pan.

Soy-coconut vs paraffin

Our wax is softer and burns cooler. It still needs a full first pool. It does not need you to “crank” it. If someone tells you soy never throws, they either wicked it wrong or never let it pool. Try it in a closed room with the lid off and the wick at 5mm. Then decide.