Razor blade technology

A shaving razor comprising

• a handle,
• a housing connected to said handle, and
• at least one razor blade mounted in said housing, said blade comprising
• a substrate with a cutting edge defined by a sharpened tip and adjacent facets,
• a layer of hard coating on said cutting edge, said hard coating being made of amorphous material containing carbon,
• an overcoat layer of a chromium containing material on said layer of hard coating, and
• an outer layer of polytetrafluoroethylene coating over said overcoat layer.

A method of making a razor blade comprising

• providing a substrate with a cutting edge defined by a sharpened tip and adjacent facets,
• adding a layer of hard coating on said cutting edge, said hard coating being made of amorphous material containing carbon,
• adding an overcoat layer of a chromium containing material on said layer of hard coating, and
• adding an outer layer of polytetrafluoroethylene coating over said overcoat layer.

A razor blade comprising

• a substrate with a cutting edge defined by a sharpened tip and adjacent facets;
• a layer of a hard carbon containing material, doped with another element, on the cutting edge;
• an overcoat layer of a chromium containing material on the layer of the hard carbon containing material;
• and
• an outer layer of polytetrafluoroethylene over the overcoat layer.

A shaving razor comprising

• a handle,
• a housing connected to the handle, and
• at least one razor blade within the housing, the razor blade comprising
• a substrate with a cutting edge defined by a sharpened tip and adjacent facets;
• a layer of a hard carbon containing material, doped with another element, on the cutting edge;
• an overcoat layer of a chromium containing material on the layer of the hard carbon containing material;
• and
• an outer layer of polytetrafluoroethylene over the overcoat layer.