Translations:Adventist Youth Honors Answer Book/Recreation/Camping Skills III/47/en

The mantle is a roughly pear-shaped ramie-based artificial silk or rayon fabric bag made from silk or fabric impregnated with rare-earth metallic salts that will convert to solid oxides after being heated in a flame. A mantle will glow brightly in the visible spectrum while emitting little infrared radiation. The rare earth oxides (cerium) and actinide (thorium) in the mantle have a low emissivity in the infrared (in comparison with an ideal black body) but have high emissivity in the visible spectrum. There is also some evidence that the emission is enhanced by candoluminescence, the emission of light from the combustion products before they reach thermal equilibrium. The combination of these properties yields a mantle that, when heated by a kerosene or liquified petroleum gas flame, emits intense radiation that is mostly visible light, with relatively little energy in the unwanted infrared, increasing the luminous efficiency.