Nib for a writing instrument

A nib for a writing instrument, said nib comprising:

• a ceramic nib body terminating at a writing point and having a tapered portion tapering in a direction toward said writing point such that the outer surface of said nib body at the tapered portion thereof converges toward said writing point, and said nib body defining at least one ink passage therein which contains a porous material, said at least one ink passage having a bottom defined by a surface of the nib that extends along said tapered portion of the nib body in a direction toward said writing point such that said at least one ink passage converges along with the outer surface of said nib body toward said writing point, the depth of said at least on ink passage becoming shallower along said tapered portion in a direction toward said writing point until the surface defining the bottom of said at least one ink passage merges with the outer surface of the nib body whereat said at least one ink passage terminates, and the surface of the nib defining the bottom of said at least one ink passage having a minimum curvature portion which establishes the angular extent subtended by said passage thereabout in each cross section of the passage taken in a plane perpendicular to the longitudinal axis of said nib body, said minimum curvature portion having a degree of curvature that decreases along said tapered portion in a direction toward said writing tip such that said angular extent subtended by said passage also decreases toward said writing tip.