The simplest way to harden steel to diamond hardness
As you know, steel can be given by special hardening such hardness that it will cut glass like diamond. But not everyone knows that to give steel such a hardness there is a very simple way. An awl, blade of a knife or other instrument should be heated to a bright red glow and immediately immersed in ordinary sealing wax for one second only. The operation of immersion in sealing wax must be repeated several times, choosing each time for immersion a fresh place in the sealing wax until the steel cools down and no longer enters the sealing wax. Then the quenching process is considered complete. It remains to clear the adhering particles of sealing wax. When using hardened in such a way a point or blade made of steel, it is recommended to moisten it with turpentine every time.