How many noodles do 200 people need to eat jiaozi?

2000 BC: People in China write with a brush made of mouse hair. This ink is a mixture of soot, lamp oil and gel.

BC 1200: The Egyptians extracted natural dyes and colors from berries, plants and minerals to make black water. This pen is a thin reed. 600 years later, the Egyptians invented papyrus.

AD 400: Many civilized societies invented more stable ink. It is made of iron salt, oak bile and gum Arabic. This basic formula has been used for centuries.

AD 700: The Romans invented quill pens, using feathers from the wings of big birds. Feather pen became the main writing tool in the later 1000.

1548: Juan de Iciar, a Spanish calligrapher, mentioned bronze pens for the first time in his calligraphy manual.

1700: Nicolas Bion (a master of musical instrument making in Louis XIV's France) first left drawings for fountain pens. He has five pens handed down from generation to generation.

1803: British engineer Brian Jintang obtained the patent for the first steel nib.

1809: Peggy Williamson obtained the patent for pen making for the first time in the United States, which is a fountain pen with ink in the pen tube. However, his design has many defects.

1830: British steelworkers william joseph Gillot, william mitchell and James Stephen Perry invented the method of mass production of nib. Due to the improvement of steel quality in the next 20 years, fewer and fewer people use quill pens.

1884: Lewis Edersen wortmann, an insurance salesman in new york, invented the first practical fountain pen after losing an important customer because the pen was broken.

1888: John Lauder of weymouth, Massachusetts, USA obtained the patent for the first ballpoint pen, but it was not mass-produced until the patent expired.

In the first decade of the 20th century, four pen manufacturers dominated the market, namely Parker, Xifeili, Will Yongfeng and Liverman.

19 12: Xifeili Pen Co., Ltd. added a pull rod water absorption device to the pen tube of fountain pen. Before this, people used droppers to add ink to fountain pens.

1935: Wolman introduced the ink bag, which was a small glass tube with a cork at that time.

1938: Hungarian journalist László Bíró and his brother Georg invented the first practical ballpoint pen. It uses printing ink that can be dried quickly. The British government later allowed them to make ballpoint pens for British Air Force pilots. Ballpoint pens do not leak oil at high altitude, while fountain pens leak oil.