Patent ID: 6137507
Filing Date: 2000-10-24
Classification: B41J

Abstract:
An ink jet printing method using an ink ejection portion having a nozzle for ejecting an ink and a printing ability improving liquid ejection portion having a nozzle for ejecting a printing ability improving liquid, and scanning said ejection portion in a main scanning direction with respect to a printing medium to form an image, said method comprising the steps of:ejecting the ink from said ink ejection portion onto the printing medium; andejecting the printing ability improving liquid from said printing ability improving liquid ejection portion onto the printing medium;wherein, when a process for ejecting the ink and a process for ejecting the printing ability improving liquid are carried out based on image data to form the image on said printing medium while moving said ink ejection portion and said printing ability improving liquid ejection portion in the main scanning direction, a number of scannings of said ink ejection portion and said printing ability improving liquid ejection portion in the main scanning direction for making the process for ejecting the ink and the process for ejecting the printing ability improving liquid different according to a print duty of the image data to be recorded, and wherein when printing is performed with a print duty higher than the other print duty, a number of scannings of said ejection portion in the main scanning direction is greater than that for the other print duty.