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Zones in a candle flame The interior of the luminous zone can be much hotter, beyond 1,500 °C (2,730 °F). [3] Color and temperature of a flame are dependent on the type of fuel involved in the combustion. For example, when a lighter is held to a candle, the applied heat causes the fuel molecules in the candle wax to vaporize.
With the fairly consistent and measurable burning of a candle, a common use of candles was to tell the time. The candle designed for this purpose might have time measurements, usually in hours, marked along the wax. The Song dynasty in China (960–1279) used candle clocks. [36]
A burning candle. Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. [1] [a] At a certain point in the combustion reaction, called the ignition point, flames are produced.
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Beeswax candles are purported to be superior to other wax candles, because they burn brighter and longer, do not bend, and burn cleaner. [14] It is further recommended for the making of other candles used in the liturgy of the Roman Catholic Church. [15] Beeswax is also the candle constituent of choice in the Eastern Orthodox Church. [16] [17]
Paraffin candle. Paraffin wax (or petroleum wax) is a soft colorless solid derived from petroleum, coal, or oil shale that consists of a mixture of hydrocarbon molecules containing between 20 and 40 carbon atoms.
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Here, the graduated candle supplied a means of determining time at night. Similar candles were used in Japan until the early 10th century. You Jiangu's device consisted of six candles made from 72 pennyweights (24 grains each), of wax, each being 12 inches high, of uniform thickness, and divided into 12 sections each of one inch.
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