The ink jet printer, having graduation treatment manner and the ink

摘要

PROBLEM TO BE SOLVED: To improve a printing image quality, and moreover to improve a through-put.;SOLUTION: In the inkjet printer 1 of a multi-drop form equipped with an inkjet head with a plurality of nozzles, a controlling part 10 which carries out delivering control of the ink by acquiring printing data is equipped with a printing data acquiring part 11 which obtains the printing data subjected to gradation processing correspondingly to each nozzle from an RIP, a gradation correcting part 12 which carries out gradation correction to the obtained printing data, and a delivering controlling part 15 which carries out delivering control to each nozzle on the basis of the gradation-corrected printing data. The gradation correcting part 12 changes an ink delivering number of times of the printing data made corresponding to each nozzle so that a gradation of the printing data made corresponding to end nozzles arranged at both end parts of the inkjet head becomes thinner than a gradation of the printing data made corresponding to intermediate nozzles arranged between the end nozzles.;COPYRIGHT: (C)2010,JPO&INPIT