WRITING OR COLOURING INSTRUMENT USING INK AND HAVING A NIB CONSISTING OF A COMPACT HYDROPHILIC BLOCK MADE OF POROUS MATERIAL, AND NIB THEREFOR

摘要

A writing and colouring instrument including a stiffening body (3) and containing a reservoir (5) for the ink (2), as well as a nib (6) supplied with ink (2) from said reservoir. The nib is a compact hydrophilic block having a given hardness and made of an open-pore porous material based on thermoplastic microbeads, said compact block being produced by sintering and thermofusing the microbeads, and having one end shaped as a writing tip (4). The nib may be made hydrophilic by oxidation processing the sintered compact block using plasma, or by treating the block with a surfactant.