Grind

It would be difficult, if not impossible, to put a "hollow grind" onto the actual cutting edge of the blade itself, which is a very narrow and small bevel.

Blades are ground during their initial sharpening or after having been sufficiently damaged, such as by breaking a tip, chipping, or extensive corrosion.

Ceteris paribus, the smaller the included angle, the sharper the blade and the more easily damaged its edge.

It is very rare to have a knife with a single ground angle forming both the profile and the cutting edge (the exception being perhaps straight razors).

An irregular material or angled cut is also likely to apply much more torque to hollow-ground blades due to the "lip" formed on either side of the edge.

Also, any object being cut must be moved aside to make way for this wider blade section, and any force distributed to the grind surface reduces the pressure applied at the edge.

Using the edge in this way is made easier by introducing a curve in the blade, as seen in sabers, tulwars, shamshirs, and katanas, among many others.

Some old European swords (most memorably Hrunting) and the Indonesian style of kris have a wavelike shape, with much the same effect in drawing or thrusting cuts.