historyWikipediaSong dynasty, 960–1279 · China

Fireworks began in Song dynasty China, where bamboo stems popping in fire inspired gunpowder firecrackers

the gist

The earliest fireworks came from China during the Song dynasty (960 to 1279). Centuries earlier, people had thrown bamboo stems into fires to make loud bangs, and later gunpowder packed into paper tubes was used to imitate that sound. Song craftspeople made the first firecrackers from rolled paper tubes with a fuse, strung them into long chains called bian, and sold them in markets. Rocket-propelled fireworks appeared by the 1200s, and Chinese chemists developed colored flames by adding metal compounds to the powder. European makers picked up the craft by the 14th century, and the range of colors expanded in the late 1700s, when chemists found that different metal salts give off specific colors.

how it works

Fireworks mix a fuel with an oxidizer, which together burn very fast and release gas, which makes the bang. Adding metal compounds makes the flame glow in specific colors, because heated metal atoms emit light at characteristic wavelengths. Strontium gives red, copper gives blue or green, and sodium gives yellow.

so what

Modern fireworks use the same basic chemistry: a fuel and oxidizer that burn fast, with metal salts providing color. Knowing that the craft started as a Chinese festival tradition puts the global New Year and national-day displays in a much longer history.

fun fact

Chinese pyrotechnicians were respected for their technical knowledge and mastery of complex displays.

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