Candle Burn Rate: Do Color & Scent Affect Burning Time?

Candle Burn Rate: What Actually Matters

Fragrance and color do not significantly affect burn time. The primary determinants are:

1. Wax type & blend: Paraffin (fastest), soy, coconut, beeswax, palm, blends — different melt points, densities, crystal structures.
2. Wick: Size (diameter), material (cotton, paper, wood), braid, treatment (primed, zinc/tin core). Too large → soot, mushrooming; too small → tunneling.
3. Container geometry: Diameter, depth, ventilation — affects melt pool and oxygen supply.
4. Additives: Stearic acid, vybar, UV inhibitors — minor effects on hardness/shrinkage.
5. Environment: Drafts (↑ burn rate, uneven), temperature, humidity, altitude.

Why Scent/Color Are Negligible

• Fragrance load: typically 6–12% by weight — too low to alter wax thermodynamics meaningfully.
• Dye: <0.1% — insoluble particles don't change fuel properties.
• Any observed difference is from wick adjustment by maker to compensate for fragrance oil's slight viscosity change.

Maximizing Burn Time

• Trim wick to ¼" before each burn.
• Burn long enough for full melt pool (1 hr per inch diameter) — prevents tunneling.
• Avoid drafts.
• Store cool, dark, lid on.

Burn time is engineered via wax/wick/container — not scent or color.