Patent ID: 8807728

Claim:
An inkjet recording method in which image formation is carried out by: employing an ink set comprising at least a cyan ink, a magenta ink, a yellow ink, and a black ink; the inks of each color comprising a polymerizable compound and a polymerization initiator; the polymerizable compound in the inks of each color comprising (Component A) at least one type of polymerizable compound selected from the group consisting of an N-vinyllactam, a compound represented by Formula (1), and a compound represented by Formula (2), and (Component B) at least one type of polymerizable compound selected from the group consisting of a compound represented by Formula (3) and a compound represented by Formula (4); the total content of Component A and Component B in the inks of each color being 55 to 85 wt % relative to the entire weight of the ink; and discharge of the inks being repeated 2 to 16 times for the same area; the method comprising at least (1) a step of discharging an ink via a lamp-equipped inkjet head unit; (2) a first exposure step of irradiating the discharged ink with actinic radiation by exposure means having an illumination intensity of at least 50 mW/cm 2 but less than 500 mW/cm 2 at a time between 0 and 1.0 second after ink discharge so that the integrated exposure for a wavelength region of 240 to 400 nm is no greater than 40 mJ/cm 2 ; and (3) a second exposure step of irradiating the discharged ink with actinic radiation by exposure means having an illumination intensity of at least 500 mW/cm 2 after at least 1.0 second has passed after ink discharge so that the integrated exposure for a wavelength region of 240 to 400 nm is 20 to 250 mJ/cm 2 ; wherein in the Formula, R 1 and R 2 denote a hydrogen atom or a methyl group, and X 1 and X 2 denote a single bond or a divalent linking group, wherein in the Formula, R 3 and R 15 denote a hydrogen atom or a methyl group, R 4 to R 14 independently denote a hydrogen atom or an alkyl group, and X 3 and X 4 denote a single bond or a divalent linking group; and wherein ink discharged from the inkjet head unit is subjected to the first exposure step by means of a trailing lamp positioned to the rear of the inkjet head unit in the printing direction and subsequently, when the lamp-equipped inkjet head is operated in the printing direction opposite to the above, the discharged ink that has been subjected to the first exposure step is subjected to the second exposure step by means of a leading lamp positioned forward of the inkjet head unit in the printing direction.