In the learning work of each student, there are many useful tools to effectively serve the acquisition process and the field of knowledge. One of the indispensable learning tools, always accompanying you to record your knowledge, is the ballpoint pen.

Regarding the origin, the ballpoint pen was invented by Hungarian journalist Lazo Biro in the 1930s, decided and researched he discovered that paper dries very quickly to create a pen that uses such ink. It was not until 1938 that the world's first ballpoint pen was born.

A ballpoint pen is a kind of pen with a simple structure and uncomplicated operating principle. The system a normal ball cart consists of two main parts, the pen shell, and the pen. The pen shell is a round cylinder 15 - 20 cm long, made of flexible plastic, harigidlastic, or colored plastic, on the body. often have parameters stating the date, place of manufacture ...

The second part is the inner pen, which is a small ink tube and the distance is 10-15cm depending on the type of pen, the nib is made of non-rust metal. At the tip of the pen is attached a ball, the diameter of the ball depends on the model, but it is different from 0.5 to 0.7 mm. The ball can move in a circular motion for even ink.