Wicks

A wick is a porous strand or cord designed to transport liquids to a flame or other point of delivery by capillary action. Wicks are used in candles, oil lamps, and a variety of devices that require controlled liquid feeding. The material, construction, and length of a wick influence how quickly liquid is drawn, how the flame behaves, and how much residue or soot is produced.

Common wick types include braided cotton wicks (with or without a central core), flat-wound wicks, and rigid-core variants. Materials are chosen for heat resistance and compatibility with the liquid being drawn. For specialized fuels or higher temperatures, fiberglass, stainless steel, or other materials may be used. Some candle wicks have metal or cotton cores to maintain rigidity and position; many modern wicks are simple cotton braids.

In candles, the wick extends into the molten wax and draws fuel toward the flame. The wick diameter and construction affect burn rate, flame size, and stability. Trimming the wick to an appropriate length (often around 1/4 inch) helps achieve a steady flame and reduce excess smoke or soot.

In oil lamps and similar devices, wicks draw fuel such as kerosene, lamp oil, or vegetable oil from a reservoir to sustain combustion. They must be compatible with the fuel and resistant to swelling or degradation.

Wicks also appear in other applications, including heat pipes, where a wick structure facilitates condensate return, and fragrance diffusers, where a wick helps deliver scented liquids. Proper wick selection and maintenance are important for safety, efficiency, and predictable performance.