The simplest method of hardening steel to diamond hardness
As you know, steel can be made by special hardening such hardness that it will cut glass, like diamond. But not everyone knows that to give steel such hardness there is a very simple way. Awl, knife blade or other tool 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 sealing wax until the steel cools and no longer enters the sealing wax. Then the hardening process is considered complete. It remains to clear the adhering particles of sealing wax. When using a steel tip hardened in this way or a blade, it is recommended to moisten it with turpentine each time.