灯心为灯心草科植物灯心草的干燥茎髓,入药有生用及煅炭用。灯心质轻易燃,不宜用炒炭法,现今仍采用传统煅炭法制取灯心炭,即将灯心置于铁锅中,上扣一稍小型号的铁锅, The heart of the wick is dried sclerophyll of rushes of the rushes plant. The medicine is used for raw materials and calcined charcoal. The light core is light and easy to burn, so it is not appropriate to use the method of frying charcoal. Today, the traditional carbon calcined method is still used to make the light core charcoal, that is to say, the wick is placed in an iron pan and a slightly smaller model of the wok is buckled.