How to make lamp oil

Use the fruit of "Tung Tree" to extract oil (called Tung Tree), put it in a lamp tray, put two or three rushes (especially rushes to absorb oil), pull the grass out of the lamp tray and light it. The flame of the oil lamp is not big. The so-called Deng Deng is like a bean. It really has a flame as big as a bean. Edible oil is also used as fuel.

The original candles were made of beeswax and ant wax, so they were called "candles". Later, when the amount of beeswax was not enough for lighting, some people made candles from cattle and sheep: cut bamboo into brands, wrap the brands with rushes, then soak them in melted animal oil, take them out covered with oil, soak them again after coagulation, and repeat them many times before they condense into candles. Something seems to have been added to prevent it from melting, but I don't know.

It is a modern thing to make candles with paraffin wax (a by-product of petroleum refining).