文具有着悠久的历史。铅笔起源于公元前的古埃及;橡皮在1770年就为世人所熟知了;第一支自动笔于1820年出现在英国;出现较晚的要数圆珠笔了,1940年左右有人在美国取得了相关专利之后,这种文具才崭露头角。言归正传。现在无论哪种文具,一旦经过各种改良重新进入人们的视线,往往会在外形上出现巨大改观。比如,橡皮之所以叫橡皮,就是因为刚开始的时候,制造橡皮的主要原料是橡胶(由橡胶树的树液凝固而成)。但现在市面上的多为塑料橡皮,名字虽然还是叫橡皮,原料却已变成了塑料(氯乙烯基树脂)。圆珠笔的升级过程也非常引入注目。圆珠笔是由油性墨水笔起步的。写字的时候,油性圆珠笔的笔油受重力吸引流下来,依靠笔头上自动转动的钢珠带出,在纸上留下印迹。但由于笔油的黏度太高,写出的字很容易出现断点,让人有烦躁感。最先改进这 Stationery has a long history. The pencil originated in ancient Egypt, BC; the eraser was well known in the world in 1770; the first automatic pen appeared in Britain in 1820; the later was the ball-point pen, and some were made in the United States around 1940 After the patent, this stationery emerge. Closer to home. Now no matter what kind of stationery, once after a variety of re-enter the people’s attention, there will often be a dramatic change in appearance. For example, the reason why eraser is called eraser is because at the beginning, the main raw material for making eraser is rubber (which is formed by the sap of rubber tree). But now the market is mostly plastic eraser, although the name is still called rubber, raw materials have become a plastic (vinyl chloride resin). Ballpoint pen upgrade process is also very noticeable. Ballpoint pen is started by the oil ink pen. At the time of writing, the pen oil of the oil-based ball-point pen was drawn down by the force of gravity and brought out by the steel ball that turns automatically on the writing head, leaving a mark on the paper. However, due to the viscosity of the pen oil is too high, the word is easy to break out of the written word, people feel irritable. First improve this