Granted Patent B2

US 12,214,583 · App. 17/865,692 · Granted Feb 4, 2025

Inventor: Keigo Ando (Matsumoto, JP)

Assignee: SEIKO EPSON CORPORATION

B41J11/0022B41J2/2117C09D11/40

Abstract

Claims (44)

1. A recording method comprising:

a white ink attachment step of ejecting a white ink composition containing a white coloring material from a white ink jet head, and attaching the white ink composition to a recording medium;

a non-white ink attachment step of ejecting a non-white ink composition containing a non-white coloring material from a non-white ink jet head, and attaching the non-white ink composition to the recording medium; and

a primary drying step of heating the white ink composition and the non-white ink composition attached to the recording medium by a drying mechanism,

wherein in the white ink attachment step and the non-white ink attachment step, a layer containing the white ink composition and the non-white ink composition is formed by performing main scanning multiple times, in which the ink compositions are ejected and attached to the recording medium, and by attaching the white ink composition and the non-white ink composition to a same scanning region in the recording medium such that the white ink composition and the non-white ink composition are mixed in the layer by a same main scanning, while moving a position of an ink jet head relative to the recording medium, and

wherein a ratio A of an attachment amount of the white ink composition to 100% by mass of an attachment amount of the non-white ink composition is 80% by mass or less, in a region having a largest attachment amount of the non-white ink composition, among regions in the recording medium where the white ink composition and the non-white ink composition are attached.

2. The recording method according to claim 1 , wherein

in the primary drying step, heating or air blowing is performed.

3. The recording method according to claim 1 , wherein

in the primary drying step, air blowing is performed, and

an air velocity in the air blowing is 0.5 to 5 m/s.

4. The recording method according to claim 1 , wherein

a surface temperature of the recording medium in the primary drying step is 35° C. to 60° C.

5. The recording method according to claim 1 , wherein

the main scanning is performed multiple times on a same region in the recording medium.

6. The recording method according to claim 1 , wherein

the ratio A of the attachment amount of the white ink composition to 100% by mass of the attachment amount of the non-white ink composition is 75% by mass or less, in the region having the largest attachment amount of the non-white ink composition, among regions in the recording medium where the white ink composition and the non-white ink composition are attached.

7. The recording method according to claim 1 , wherein

a largest attachment amount of the white ink composition in regions in the recording medium where the white ink composition and the non-white ink composition are attached is 10 mg/inch 2 or less.

8. The recording method according to claim 1 , wherein

a content of the white coloring material is 8% by mass or more, based on a total amount of the white ink composition.

9. The recording method according to claim 1 , wherein

the white ink composition contains organic solvents, and

a content of an organic solvent having a standard boiling point of lower than 200° C. among the organic solvents is 50% by mass or more, based on a total amount of the organic solvents.

10. The recording method according to claim 1 , wherein

the white ink composition contains both-end-type alkanediol having 3 to 5 carbon atoms as an organic solvent.

11. The recording method according to claim 1 , wherein

the white ink composition contains an organic solvent, and

a maximum value of a standard boiling point of the organic solvent is 250° C. or lower.

12. The recording method according to claim 1 , wherein

the white ink composition contains organic solvents, and

the organic solvents include an organic solvent having a standard boiling point of lower than 200° C. and an organic solvent having a standard boiling point of 200° C. or higher.

13. The recording method according to claim 1 , wherein

each of the white ink composition and the non-white ink composition is an aqueous ink composition or each of the white ink composition and the non-white ink composition is a solvent-based ink composition.

14. The recording method according to claim 13 , wherein

each of the white ink composition and the non-white ink composition is the aqueous ink composition, and

a content of an organic solvent in each of the white ink composition and the non-white ink composition is 30% by mass or less.

15. The recording method according to claim 1 , wherein

the recording medium is a low-absorbent recording medium or a non-absorbent recording medium.

16. A recording device that performs recording by the recording method according to claim 1 , comprising:

a white ink jet head configured to eject a white ink composition containing a white coloring material, and attach the white ink composition to a recording medium;

a non-white ink jet head configured to eject a non-white ink composition containing a non-white coloring material, and attach the non-white ink composition to the recording medium;

a drying mechanism configured to dry the white ink composition and the non-white ink composition attached to the recording medium; and

a control section configured to perform control of recording by using the white ink jet head and the non-white ink jet head.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (12)