| + | The ''slit'' is usually made after depositing the iridium tip, and generally extends to the air hole, although there are nibs without air hole, where the ''slit'' simply stops at the right height, or rigid nibs for accounting where the cut is very short and stops before it, and the air hole is placed in position behind. Finally, there are also nibs with more than a ''slit'', like the the so-called ''music nibs'' in which to provide enough ink feed to a very large tip, the tip itself is divided in three parts by two slits. |