Ink jet recording method and ink jet recording apparatus
Provided is an ink jet recording method including using an ink jet recording apparatus, the ink jet recording apparatus including: an aqueous ink containing resin particles each dyed with a fluorescent dye. A plurality of nozzle arrays include a first nozzle array and a second nozzle array arranged in a predetermined direction so as to be displaced from each other in such a manner that end nozzles in the nozzle arrays adjacent to each other form an overlapping portion in a direction intersecting the predetermined direction. The aqueous ink is ejected from overlapping nozzles at the overlapping portion while the nozzles are allocated to the first nozzle array and the second nozzle array. An application time difference of the aqueous ink ejected from the overlapping nozzles is 20 milliseconds or less.
1 . An ink jet recording method comprising:
recording an image on a recording medium through use of an ink jet recording apparatus, the ink jet recording apparatus including:
an aqueous ink comprising resin particles each dyed with a fluorescent dye; and
a recording head having a plurality of nozzle arrays each formed by arranging a plurality of nozzles each configured to eject the aqueous ink in a predetermined direction,
wherein the plurality of nozzle arrays comprises a first nozzle array and a second nozzle array arranged so as to be displaced from each other in the predetermined direction in such a manner that end nozzles in the nozzle arrays adjacent to each other form an overlapping portion in a direction intersecting the predetermined direction,
wherein the aqueous ink is ejected from overlapping nozzles at the overlapping portion while the nozzles are allocated to the first nozzle array and the second nozzle array,
wherein an application time difference of the aqueous ink ejected from the overlapping nozzles is 1 millisecond or more to 20 milliseconds or less, and
wherein the application time difference is adjusted based on at least one factor selected from the group consisting of: a distance between the nozzle arrays, a relative scanning speed between the recording head and the recording medium, and a scanning speed of the recording head.
2 . The ink jet recording method according to claim 1 , wherein the recording head is a line head.
3 . The ink jet recording method according to claim 1 , wherein the recording head is a serial head configured to apply the aqueous ink to a unit region of the recording medium through one relative scanning with respect to the recording medium.
4 . The ink jet recording method according to claim 1 , wherein an ejection amount per droplet of the aqueous ink is 10.0 ng or less.
5 . The ink jet recording method according to claim 1 ,
wherein the recording head includes a temperature control mechanism, and
wherein the aqueous ink warmed by the temperature control mechanism inside the recording head is ejected.
6 . The ink jet recording method according to claim 5 , wherein a temperature-control temperature Th of the recording head and a glass transition temperature Tg of the resin particles satisfy a relationship: Th<Tg.
7 . The ink jet recording method according to claim 1 , wherein a ratio (% by mass) of the fluorescent dye in the resin particles is 2.0% by mass or more to 8.0% by mass or less.
8 . The ink jet recording method according to claim 1 ,
wherein the aqueous ink further comprises a silicone-based surfactant, and
wherein a content (% by mass) of the silicone-based surfactant in the aqueous ink is 0.1% by mass or more to 3.0% by mass or less with respect to a total mass of the aqueous ink.
9 . The ink jet recording method according to claim 1 ,
wherein the aqueous ink further comprises a water-soluble resin having an anionic group, and
wherein the water-soluble resin is a urethane resin.
10 . The ink jet recording method according to claim 9 ,
wherein the urethane resin has a unit derived from a polyester polyol.
11 . The ink jet recording method according to claim 10 ,
wherein a content (% by mass) of the urethane resin in the aqueous ink is 0.04 times or more to 1.00 times or less in terms of mass ratio with respect to a content (% by mass) of the resin particles.
12 . An ink jet recording apparatus comprising:
an aqueous ink comprising resin particles each dyed with a fluorescent dye; and
a recording head having a plurality of nozzle arrays each formed by arranging a plurality of nozzles each configured to eject the aqueous ink in a predetermined direction,
wherein the plurality of nozzle arrays comprises a first nozzle array and a second nozzle array arranged so as to be displaced from each other in the predetermined direction in such a manner that end nozzles in the nozzle arrays adjacent to each other form an overlapping portion in a direction intersecting the predetermined direction,
wherein the ink jet recording apparatus is configured to eject the aqueous ink from overlapping nozzles at the overlapping portion while the nozzles are allocated to the first nozzle array and the second nozzle array,
wherein the ink jet recording apparatus is configured to control an application time difference of the aqueous ink ejected from the overlapping nozzles to be 1 millisecond or more to 20 milliseconds or less, and
wherein the application time difference is adjusted based on at least one factor selected from the group consisting of: a distance between the nozzle arrays, a relative scanning speed between the recording head and the recording medium, and a scanning speed of the recording head.