Note that razors are as sharp as they are because they are usually used in a push-cut rather than a slicing action (eg to part whiskers when shaving). ... So something slightly less than razor sharpness is probably what you will have on working knives most of the time. Still, a near razor sharp knife is a pleasure to use.

How are razor blades made so sharp?

Grinding the edges is what makes the edges sharp so it will cut the hairs right off. The polishing step smooths out the edges by removing any burrs or stray fragments from the cutting edges. DE blades need to have sharp but smooth edges to ensure they can cut the hairs without cutting the skin.

Is a razor blade considered a sharp?

A SHARP is any item that can cause a cut or puncture a human being. This definition is expanded to include any item that cut or puncture a container or bag. This includes glass, empty bottles, scalpel blades, razor blades syringes and needles.