Pen is a pen-like writing tool mainly made of metal, which holds ink (mostly black or blue) through a hollow pen tube through gravity and capillary action.
Then write in duckbill, which is different in weight when writing, and can be said to be a writing tool of western calligraphy. Most pens can be replenished with ink. Generally speaking, vials or straws such as eye drops are used to supplement the kit.
The nib, the most critical part of a pen, varies from fine to thick. Generally speaking, the most common pen tip sizes are "B (wide), M (medium), FM (thin-medium), F (thin) and EF (extra thin)".
Extended data
Ink is one of the necessary writing materials for people in all social activities. China's pen-making industry was established in the early 1950s, and now it has a considerable scale, forming a relatively complete production system with multiple categories and varieties.
There are more than 500,000 employees engaged in the pen-making industry in China. In 2004, the direct sales value of pen products (including pen products, ink and pen accessories) provided by China pen industry to domestic and foreign markets was about 65.438+06.5438+03 billion yuan, of which the export value was about 6.86 billion yuan, the direct sales value to the domestic market was about 4.44 billion yuan, and the products were exported to 65.438+000 yuan.
The output of fountain pens ranks first in the world (about 65.438+65 billion), ballpoint pens rank first in the world, and mechanical pencil ranks third in the world, with an annual output of 500 million. The output and export of all kinds of pen-making products in China rank first in the world, and China's pen-making industry has become a world power.
References:
Baidu encyclopedia-pen
References:
Baidu encyclopedia-gel pen