Ceramic cutting blades

A ceramic cutting blade, comprising

• a first portion terminating at a first edge, the first portion having a first thickness;
• a second portion terminating at a second edge, the first and second portions meeting at a boundary that is defined by the ceramic blade changing in thickness from the first thickness;
• a third edge that extends from a first end of the first edge to a first end of the second edge, the third edge passing along both the first and second portions;
• and
• a fourth edge that extends from a second end of the first edge to a second end of the second edge, the fourth edge passing along both the first and second portions;
• wherein the second edge is a pointed cutting edge portion;
• wherein the ceramic blade is a single part, entirely ceramic unitary blade that tapers down in thickness from the boundary to the second edge, the boundary extending from the third edge to the fourth edge of the blade in a plane parallel to the first and second edges;
• wherein a first intersection portion between the third edge and the second edge is rounded;
• wherein a second intersection portion between the fourth edge and the second edge is rounded;
• wherein the rounded first intersection portion decreases in thickness from a first thickness to a second thickness in a direction moving from the third edge to the second edge;
• wherein the rounded first intersection portion extends from the third edge to the second edge and is entirely rounded from the third edge to the second edge;
• and
• wherein the rounded first intersection portion decreases in width from the third edge to the second edge.