PRINTER

摘要

A printer head which discharges only an ink or mixes an ink with a dilution liquid to discharge the mixed liquid is formed at a portion thereof at least around a nozzle opening on a nozzle opening side surface by a polyimide based polymer to enable forming a recorded image of high resolution and make productivity favorable. The polyimide based polymer is preferably polyimide siloxane which has a water absorption coefficient of 0.4 % or less when immersed in water of 23 DEG C for 24 hours and is formed through polymerization with heating of 180 DEG C or less. Further, the portion of the nozzle forming section of the printer head which is not constituted by the polyimide based polymer, is preferably constituted by polysulfone, polyethersulfone and a polyimide based polymer which has water absorption coefficient of 1.0 % or more when immersed in water of 23 DEG C for 24 hours. Also, a nozzle is preferably formed by ablation processing which uses excimer laser.