Method of processing nozzle plate, nozzle plate, ink jet head and image forming apparatus

摘要

A method of processing a nozzel plate on which a plurality of nozzel holes for jetting ink are provided, comprises steps of: bringing one side of the nozzele plate in contact with a processing liquid; bringing the other side of the nozzel plate in contact with a gas phase; and forming a boundry surface between the processing liquid and the gas phase so that a film layer is formed on the one side of the nozzel plate by the processing liquid.