Ink jet recording method
View Patent ↗An ink jet recording method includes a white ink adhesion step of causing a white ink containing a white pigment to adhere to a recording medium by an ink jet method; a non-white ink adhesion step of causing a non-white ink containing a non-white coloring material to adhere to the recording medium by the ink jet method; and a drying step of drying the white ink and the non-white ink adhering to the recording medium in the white ink adhesion step and the non-white ink adhesion step by a blowing type or radiation type drying unit, in which the white ink adhesion step and the non-white ink adhesion step are performed in a state where the recording medium is supported on a support member including a suction hole sucking the recording medium, and are performed by plural times of main scanning in which a recording head discharging the white ink and a recording head discharging the non-white ink discharge each ink while moving in a main scanning direction and plural times of sub-scanning in which the recording medium moves in a sub-scanning direction intersecting the main scanning direction.
1. An ink jet recording method comprising:
a white ink adhesion step of causing a white ink containing a white pigment to adhere to a recording medium by an ink jet method;
a non-white ink adhesion step of causing a non-white ink containing a non-white coloring material to adhere to the recording medium by the ink jet method; and
a drying step of drying the white ink and the non-white ink adhering to the recording medium in the white ink adhesion step and the non-white ink adhesion step by a blowing type or radiation type drying unit, wherein
the white ink adhesion step and the non-white ink adhesion step are performed in a state where the recording medium is supported on a support member including a suction hole sucking the recording medium, and are performed by plural times of main scanning in which a recording head discharging the white ink and a recording head discharging the non-white ink discharge each ink while moving in a main scanning direction and plural times of sub-scanning in which the recording medium moves in a sub-scanning direction intersecting the main scanning direction.
2. The ink jet recording method according to claim 1 , wherein
a surface temperature of the recording medium in the white ink adhesion step and the non-white ink adhesion step is 40.0° C. or lower.
3. The ink jet recording method according to claim 1 , wherein
in the step performed first among the white ink adhesion step and the non-white ink adhesion step, the number of times of the main scanning which is performed in a state where an area of the recording medium is supported on the suction hole is 10 or less.
4. The ink jet recording method according to claim 1 , wherein
the support member includes a conductive type drying unit heating the recording medium conductively, and
the ink jet recording method further comprises a drying step of drying the white ink and the non-white ink adhering to the recording medium in the white ink adhesion step and the non-white adhesion step, by the conductive type drying drying unit.
5. The ink jet recording method according to claim 1 , wherein
a material of the support member is metal or plastic.
6. The ink jet recording method according to claim 1 , further comprising:
a treatment liquid adhesion step of causing a treatment liquid containing an aggregating agent to adhere to the recording medium.
7. The ink jet recording method according to claim 6 , wherein
a thickening ratio of the ink adhering in the step performed later among the white ink adhesion step and the non-white ink adhesion step is greater than a thickening ratio of the ink adhering in the step performed first.
8. The ink jet recording method according to claim 1 , wherein
the white ink adhesion step is performed prior to the non-white ink adhesion step.
9. The ink jet recording method according to claim 1 , wherein
the recording head includes a first nozzle array and a second nozzle array each of which nozzles are arranged in the sub-scanning direction,
the first nozzle array and the second nozzle array are disposed to overlap each other when projected in the main scanning direction,
each of the first nozzle array and the second nozzle array has a discharge nozzle group and a non-discharge nozzle group,
when the discharge nozzle group of the first nozzle array and the discharge nozzle group of the second nozzle array are projected in the main scanning direction, the discharge nozzle group of the first nozzle array is disposed upstream of the discharge nozzle group of the second nozzle array in a transport direction of the recording medium in the sub-scanning direction,
the ink adhering in the step performed first among the white ink adhesion step and the non-white ink adhesion step is discharged from the discharge nozzle group of the first nozzle array, and
the ink adhering in the step performed later among the white ink adhesion step and the non-white ink adhesion step is discharged from the discharge nozzle group of the second nozzle array.
10. The ink jet recording method according to claim 1 , wherein
an adhesion amount of the white ink in the white ink adhesion step is 5.0 mg/inch 2 or more.
11. The ink jet recording method according to claim 1 , wherein
the recording is performed on a low-absorbent recording medium or a non-absorbent recording medium.
12. The ink jet recording method according to claim 1 , wherein
in the ink adhering in the step performed later among the white ink adhesion step and the non-white ink adhesion step, a content of an organic solvent of polyols, having a normal boiling point of 280.0° C. or higher is 1.0% by mass or less relative to an ink total amount.
13. The ink jet recording method according to claim 1 , wherein
a white ink layer formed by the white ink adhesion step and a non-white ink layer formed by the non-white ink adhesion step are stacked on the recording medium.