How sharp are Zamboni blades?

How sharp are Zamboni blades? The blade on the Zamboni machine is designed especially for ice-resurfacing. It is sharp enough to slice through thick stacks of newsprint, weighs 57 pounds and is ½ inch thick.

The blade on the Zamboni machine is designed especially for ice-resurfacing. It is sharp enough to slice through thick stacks of newsprint, weighs 57 pounds and is ½ inch thick.