Inkjet-recording method and injet-recording material

Abstract

The invention provides an inkjet-recording method of recording an image on an ink-receiving layer, comprising ejecting ink droplets of a water-soluble ink containing a water-soluble phthalocyanine dye on the ink-receiving layer of an inkjet-recording medium having a substrate and an ink-receiving layer containing a water-soluble bivalent metal salt in an amount of 0.01 to 2 g/m2 formed thereon.

Description

Claims

1. An inkjet-recording method of recording an image on an ink-receiving layer, comprising ejecting ink droplets of a water-soluble ink containing a water-soluble phthalocyanine dye on the ink-receiving layer of an inkjet-recording medium having a substrate and an ink-receiving layer containing a water-soluble bivalent metal salt in an amount of 0.01 to 2 g/m2 formed on the substrate.

2. The inkjet-recording method of claim 1, wherein the water-soluble bivalent metal salt is at least one of a water-soluble magnesium salt and a water-soluble calcium salt.

3. The inkjet-recording method of claim 1, wherein the water-soluble phthalocyanine dye is a dye having a molar extinction coefficient ε1, as determined from the absorbance at the maximum wavelength in the spectroscopic absorption curve when an aqueous solution of the dye at a concentration of 0.1 mmol/l is measured by using a cell having an optical path length of 1 cm, and a molar extinction coefficient ε2, as determined from the absorbance at the maximum wavelength in the spectroscopic absorption curve when an aqueous solution of the dye at a concentration of 0.2 mmol/l is measured by using a cell having an optical path length of 5 μm, satisfying the relationship ε1/ε2>1.2.

4. The inkjet-recording method of claim 1, wherein at least one of the water-soluble phthalocyanine dyes is at least one compound selected from the compounds represented by the following Formula (1) and the salts thereof:

5. The inkjet-recording method of claim 4, wherein in the Formula (1), at least one of X11 to X14 is a water-soluble group and at least one of X11 to X14 is a hydrogen-bonding group.

6. The inkjet-recording method of claim 5, wherein in the Formula (1), a numerical ratio of water-soluble group(x)/hydrogen-bonding group(y) is (0<x<3)/(1<y<4).

7. The inkjet-recording method of claim 1, wherein at least one of the water-soluble phthalocyanine dyes is a mixture of the phthalocyanine compounds represented by the following Formula (2) having at least one unsubstituted sulfamoyl group and at least one substituted sulfamoyl group containing an ionic hydrophilic group:

8. The inkjet recording method of claim 1, wherein the water-soluble bivalent metal salt is at least one of magnesium chloride, magnesium sulfate, magnesium nitrate, and calcium chloride.

9. The inkjet recording method of claim 1, wherein the ink-receiving layer further comprises a water-soluble binder.

10. The inkjet recording method of claim 9, wherein the water-soluble binder is polyvinylalcohol.

11. The inkjet recording method of claim 1, wherein the ink-receiving layer further comprises a crosslinking agent.

12. The inkjet recording method of claim 11, wherein the crosslinking agent is boric acid.

13. The inkjet recording method of claim 1, wherein the ink-receiving layer further comprises a particle.

14. The inkjet recording method of claim 1, wherein the inkjet-recording medium is produced by forming the ink-receiving layer on a substrate by forming a coated layer by coating a first solution comprising a water-soluble binder and a crosslinking agent crosslinking the water-soluble binder, crosslinking and hardening the coated layer by applying a second solution containing a basic compound on the coated layer either (1) simultaneously with application of the first solution or (2) in the period before the coated layer shows a falling drying rate during drying of the coated layer.

15. The inkjet recording method of claim 14, wherein the second solution comprises the water-soluble metal salt.

16. An inkjet-recorded material, recorded by the inkjet-recording method of claim 1.