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Mint (facility)

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A mint is a special kind of factory. It is a place where people make coins to use as money.

United States Mint, Philadelphia, Aug 2019
United States Mint, Philadelphia, Aug 2019

These factories must be very careful. They make sure every coin is the right size and weight. Making coins can be expensive for a country. Sometimes it costs more to make a coin than the coin is worth. In 2016, a U.S. penny cost $0.015 to make. This is more than the one cent it is worth. However, other coins are cheaper to make. It costs the United States Mint much less than 25 cents to make a quarter. The extra money saved helps pay for the minting work. This difference is called seigniorage.

How does a mint actually work? In the old days, people used very simple ways. They would pour hot metal into a mold to cast coins. Or they would hit a piece of metal with a hammer. They used a die, which is a tool with a shape carved into it.

Mold for making banliang coins
Mold for making banliang coins

They would place a blank piece of metal on an anvil. Then they would hold a die in place with tongs. A heavy hammer blow would strike the die to leave a mark. Later, makers used a screw press to push the dies down.

Coiningpress1
Coiningpress1

This was a machine that used a screw to create a strong downward force. Today, modern mints use huge machines to make billions of coins.

The history of minting goes back a very long time. The first mint was likely started in Lydia during the 7th century BC. They made coins from gold, silver, and electrum.

Horse head, rough incuse
Horse head, rough incuse

Early coins in Europe came from the island of Aegina. In China, mints appeared around the same time. These coins spread to Korea and Japan. The word "mint" actually comes from Rome. It comes from the Temple of Juno Moneta in 269 BCE. People used the name of the goddess Moneta to mean money. Roman mints were used to spread news about new leaders. People saw a new Emperor's face on a coin to learn he was in charge.

New machines changed everything for coin makers. In 1788, a man named Matthew Boulton changed how things worked. He lived in Birmingham and used steam power.

Anglesey 1790 Rev 400 (1)
Anglesey 1790 Rev 400 (1)

He invented a steam-driven screw press. This machine used a piston to strike coins very fast. His machines could strike between 70 and 84 coins every minute. This made coins much more uniform. They all had the same round shape and weight. This made it much harder for people to make fake coins. Boulton's work helped create the first truly modern coins.

Many famous mints still exist around the world today. The Austrian Mint was established in 1397. It makes special gold coins called the Vienna Philharmonic. The Casa de Moneda de México is the oldest mint in the Americas. It was started in 1535. In the United States, the Philadelphia Mint is a very well-known site.

San Francisco Mint 2007
San Francisco Mint 2007

There is also the San Francisco Mint, which has a large building built in 1937. Mints connect to our daily lives every time we buy something. We use the coins they make to pay for food or toys. Every coin in your pocket has a long history of science and machines behind it.

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🖼️ Images & Media (7)
File:United States Mint, Philadelphia, Aug 2019.jpg
United States Mint, Philadelphia, Aug 2019.jpg
File:Mold for making banliang coins.jpg
Mold for making banliang coins.jpg
File:Horse head, rough incuse.jpg
Horse head, rough incuse.jpg
File:Anglesey 1790 Rev 400 (1).jpg
Anglesey 1790 Rev 400 (1).jpg
File:Coiningpress1.jpg
Coiningpress1.jpg
File:1831 coining press (M.A.N. 1873-22-19) 01.jpg
1831 coining press (M.A.N. 1873-22-19) 01.jpg
File:San Francisco Mint 2007.jpg
San Francisco Mint 2007.jpg
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