Inkjet recording method

Abstract

Provided is an inkjet recording method which includes a step in which an ink containing a colorant and water is applied to surface A, that is, one surface of a paper substrate, by means of an inkjet recording method, a step in which infrared light having a maximum wavelength in the 800 nm to 3,000 nm range is emitted to surface A to which the ink has been applied, and a step in which a post-treatment liquid containing water and a surfactant is applied to surface B, that is, the other surface of the paper substrate, in said order. The paper substrate includes a pulp layer and a coating layer, with the coating layer disposed on the surface A side, wherein: the coating layer disposed on the surface A side has a dry coat weight of 15 g / m2 to 50 g / m2; and either no coating layer is disposed on the surface B side, or, if disposed, the coating layer disposed on the surface B side has a dry coat weight of 10 g / m2 or less.

Claims

1. A process of applying ink containing a colorant and water to one side of a paper substrate, side A, using an inkjet recording method, The process involves irradiating surface A, to which the ink has been applied, with infrared light having a maximum wavelength in the range of 800 nm to 3,000 nm, The process includes, in this order, applying a post-treatment solution containing water and a surfactant to the other side of the paper substrate, which is side B, The paper substrate comprises a pulp layer and a coating layer disposed on at least one surface of the pulp layer. The coating layer comprises at least one white pigment selected from the group consisting of calcium carbonate and kaolin, and a binder. The coating layer is arranged on side A, and the dry coating amount of the coating layer arranged on side A is 15 g / m². ２ ~50g / m ２ And, The coating layer is not placed on the B-side, or if it is placed there, the dry coating amount of the coating layer on the B-side is 10 g / m². ２ The following is an inkjet recording method.

2. The inkjet recording method according to claim 1, wherein the infrared light is near-infrared light having a maximum wavelength in the range of 800 nm to 1,400 nm.

3. The inkjet recording method according to claim 1 or claim 2, wherein the post-treatment liquid has a surface tension of 22.5 mN / m to 40.0 mN / m.

4. In the step of applying the post-treatment liquid, the amount of the post-treatment liquid applied per unit area is 10 g / m². ２ ~55g / m ２ The inkjet recording method according to claim 1 or claim 2, which is provided as a range.

5. The inkjet recording method according to claim 1 or claim 2, wherein the surfactant includes a nonionic surfactant.

6. The inkjet recording method according to claim 1 or claim 2, wherein the surfactant has an HLB value of 8.0 to 14.

0.

7. The aforementioned paper substrate has a basis weight of 180 g / m². ２ ~600g / m ２ The inkjet recording method according to claim 1 or claim 2.

8. The process includes applying a pretreatment solution to surface A before applying the ink, The inkjet recording method according to claim 1 or claim 2, wherein in the step of applying the ink, the ink is applied to surface A to which the pretreatment liquid has been applied.

9. The inkjet recording method according to claim 8, wherein the pretreatment solution contains an organic acid.

10. The inkjet recording method according to claim 1 or claim 2, wherein the ink is applied only to surface A, and an image is recorded only on surface A.

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