How is a ballpoint pen made?

In the early days of World War II, journalists were often troubled by the lack of ideal writing tools when conducting battlefield interviews. Fountain pens are often unable to write because there is no ink, and pencils are not of good quality and wear-resistant. People urgently need a new writing tool to replace pencils and fountain pens. Not long after, Hungarian journalist Lez Bilo used oil-soluble pigments according to the principle of oil penetration. After many experiments, he finally made the first ballpoint pen, which people called "oil-soluble pen".

At that time, Hungary had joined the Axis League under the threat of German fascism. Biro, with a sense of justice, applied for a patent in Britain. Then he sold the patent right to the American Iverson Company. During the war years, no one asked about the patent right, and the Royal Air Force Aircraft Factory secretly produced the world's first batch of commercial oil-soluble pens. Almost at the same time, American adventurer Milton Reynolds also took a fancy to oil-soluble pens, so he secretly set up a factory in Chicago to produce them and sold them in large quantities in department stores all over the world.

After World War II, Renault traveled around the world with a large number of oil-soluble pens in order to escape the investigation of international law. Lie that pens are made of atomic energy and will never be finished, and so on. So "ballpoint pen" is widely popular in five continents. The patent lawsuit took a long time to solve. At this time, Iverson has been unable to change the impression of "ballpoint pen" in people's minds, and can only take a similar sound according to some characteristics of the pen, which is what people say now.