Edge sharpener

An elongated sharpening bar comprising a generally rectangular-shaped metal body having attached thereto at least one abrasive strip, the balance of said bar being substantially covered with a ceramic coating created in an electrolytic bath.

Method of making a sharpening device having at least one edge comprising placing a metal incipient sharpening device as an electrode in an electrolytic bath and imposing a modified shaped wave alternating current in said bath.

Method of making a sharpening device comprising forming a hard coating on an incipient sharpening device by (i) immersing the incipient sharpening device in an electrolytic bath comprising a passivating agent and an electrolytic agent, and (ii) passing a modified shaped-wave alternating electric current from a source of 250 to 800 volts through the surface of the incipient sharpening device, wherein the modified shaped-wave electric current rises from zero to its maximum height and falls to below 40% of its maximum height within less than a quarter of a full alternating cycle thereby causing dielectric breakdown and the formation of a ceramic coating on the surface of said incipient sharpening device, and removing the completed sharpening device from the electrolytic bath.

An edge sharpening device comprising an elongated metal body having a ceramic surface on at least two contour portions selected from flat, rounded edge, and tapered.

An edge sharpening device including at least one of a V groove and an abrasive strip.