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Fireworks

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Fireworks are low explosive pyrotechnic devices used for entertainment and aesthetic beauty.

San Diego Fireworks
San Diego Fireworks

They are most often used in large outdoor displays called pyrotechnics. These displays serve as the focal point for many religious and cultural celebrations. A successful show produces four primary effects: light, noise, smoke, and floating materials like confetti.

Fireworks 2021-07-04 (4) jeh
Fireworks 2021-07-04 (4) jeh

While they bring joy, mismanagement of these devices can lead to dangerous accidents.

Pyrotechnic devices are generally classified by where they perform. Ground fireworks stay near the earth, while aerial fireworks travel into the sky.

Groundfireworks-burning
Groundfireworks-burning

Aerial fireworks can be launched in two ways. Some are skyrockets, which have their own internal propulsion. Others are aerial shells, which are shot into the air by a device called a mortar.

Fireworks shell
Fireworks shell

The aerial shell is the backbone of modern commercial displays. In the United States, a smaller version for consumer use is known as a festival ball.

Most fireworks consist of a paper or pasteboard casing. This tube is filled with combustible material, specifically pyrotechnic stars.

Firework design
Firework design

These stars are small pellets that produce intense light when ignited. Each star contains four essential ingredients to function. They require a fuel to burn and an oxidizer to produce intense heat. They also include color-producing salts and a binder to hold the pellet together.

Fireworks shell
Fireworks shell

When the casing is kindled, these stars create various sparkling shapes and colors.

History shows that fireworks were originally invented in China. During the Han dynasty, people threw bamboo stems into fires to create loud explosions.

18th century English illustration of Chinese fireworks
18th century English illustration of Chinese fireworks

Later, gunpowder was packed into containers to mimic these sounds. These were known as baozhu or baogan. During the Song dynasty, the first paper firecrackers were manufactured.

Ming Dynasty Jin Ping Mei fireworks
Ming Dynasty Jin Ping Mei fireworks

People even strung them into large clusters called bian, which means "whip." These clusters allowed for a sequence of rapid explosions.

Chinese pyrotechnicians were highly respected for their complex technical knowledge. They developed early rocket propulsion, such as the dilaoshu, or "earth rat."

A firework display for Muḥammad Sháh, portrayed seated and leaning against a bolster.
A firework display for Muḥammad Sháh, portrayed seated and leaning against a bolster.

They also mastered the use of chemicals to create colored smoke and flames. For example, they used copper acetate to create green colors. They used arsenical sulphide for yellow and lead carbonate for lilac-white.

Flametest--Cu.swn
Flametest--Cu.swn

These ancient secrets of color were often seen as a mystery by travelers.

Modern chemistry significantly changed the quality of pyrotechnics. Before the nineteenth century, fireworks were relatively dull and unexciting.

Grand finale
Grand finale

In 1786, the discovery of potassium chlorate oxidations allowed for violet emissions. Later, scientists found that different metal salts produced intense, bright colors. Strontium creates an intense red, while barium produces green.

Fireworks shell
Fireworks shell

Copper halides are used for blue, and sodium provides a bright gold or yellow. The isolation of magnesium and aluminium also allowed for intense silvery light.

Today, the production of fireworks remains a massive global industry. China remains the largest manufacturer and exporter of fireworks in the entire world.

Modern pyrotechnics rely on a precise balance of elements. Carbon serves as a main fuel component in black powder.

Fireworks shell
Fireworks shell

Metals like titanium and zirconium are used in elemental form to produce sparks. While many compounds are non-toxic, some are poisons or inhalation hazards. This science allows for the spectacular displays that connect people through shared wonder.

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🖼️ Images & Media (31)
File:Correfoc, Vilanova i la Geltru, August 2012.png
Correfoc, Vilanova i la Geltru, August 2012.png
File:Ming Dynasty Jin Ping Mei fireworks.jpg
Ming Dynasty Jin Ping Mei fireworks.jpg
File:RoyalFireworks.jpg
RoyalFireworks.jpg
File:18th century English illustration of Chinese fireworks.jpg
18th century English illustration of...
File:A firework display for Muḥammad Sháh, portrayed seated and leaning against a bolster..jpg
A firework display for Muḥammad Sháh,...
File:Preparation of a brilliant fireworks display, Sayn Castle Festival, 2005.jpg
Preparation of a brilliant fireworks...
File:Groundfireworks-burning.jpg
Groundfireworks-burning.jpg
File:Firework design.jpg
Firework design.jpg
File:Grand finale.jpg
Grand finale.jpg
File:Flametest--Cu.swn.jpg
Flametest--Cu.swn.jpg
File:Fireworks_shell.jpg
Fireworks_shell.jpg
File:Fireworks 2021-07-04 (4) jeh.jpg
Fireworks 2021-07-04 (4) jeh.jpg

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