Once we mentioned the knife, what would you think of it? Cutting food, killing the enemy to protect yourself, or other things else. The knife is related to human beings in close, which has also witnessed the continuous development of human civilization.

Starting from the new-stone age, our ancestors had ground the stones into knives to hunt for animals and protect their clans. In the Bronze Age, our forefathers forged knives with different kinds of metal, such as copper, iron, and aluminum. The metal knives had expressed higher speed in cutting. And they were used for cutting food and defending against the enemy. Now, knives are not only applied to food cutting and defending but also spread to every manufacturing industry.

For example, the cutting blades for cell phone parts, the quartz cutting for the watch, the bottle model cutting, the corrugated cardboard slitter blades, plastic cutting, film cutting, and toilet paper cutting. All of these require different kinds of cutting tools. Being quite different from the daily food cutting knives, the blades in industrial production are more often composed of a kind of raw material called tungsten carbide. It brings faster-cutting speed, stronger wear-resistant, and more work lifetime.

If the discovery of fire had brought a human into civilization, then the evolution of knives has witnessed the development of human civilization. Whether the original stone knife or the carbide slitter knives, both of them are just like telling a long story of human civilization history.

Nowadays, with the rapid development of science and technology, we no longer need knives to defend against the enemies in the war to protect our country. But the industrial civilization has been continuously developing by the means of a knife called cemented carbide knives. Why? Let’s see: if the blades with a more fast cutting speed could bring higher output, the higher output could increase the production volumes, and increased production capacity takes greater economic benefits to the manufacturers. Therefore, each country is scrambling to develop raw materials which can bring higher cutting efficiency to blades. Even if all we know is that carbide slitting knives is the top one at present.

Why would we say that the development of the knives has witnessed the development of industry, it is widely applied to various industries. From aerospace, oil drilling, and mining to toilet paper cutting, wrapping paper cutting, and so on.