Ink jet recording method and ink set

1. An ink jet recording method which performs recording on a recording medium using a white ink composition, a non-white ink composition, and a treatment liquid containing an aggregating agent, the method comprising:

a treatment liquid adhesion step of adhering the treatment liquid to the recording medium to form a treatment liquid layer;

a non-white ink adhesion step of adhering the non-white ink composition to the recording medium by ejection thereof from an ink jet head to form a non-white ink layer; and

a white ink adhesion step of adhering the white ink composition to the recording medium by ejection thereof from an ink jet head to form a white ink layer,

wherein the recording medium has a region in which the non-white ink layer, the white ink layer, and the treatment liquid layer are overlapped,

at least one of the white ink composition and the non-white ink composition contains resin particles and a water-soluble resin, or one of the white ink combination and the non-white ink composition contains resin particles, and the other contains a water-soluble resin,

the water-soluble resin has a glass transition temperature higher than that of a resin of the resin particles,

the glass transition temperature of the water-soluble resin is in the range of 90 to 200° C., and

the water-soluble resin is dissolved in a medium of the ink composition.

2. The ink jet recording method according to claim 1 , wherein the white ink composition contains the resin particles and the water-soluble resin.

3. The ink jet recording method according to claim 1 , wherein at least one of the white ink composition and the non-white ink composition contains the resin particles and the water-soluble resin, and a content of the resin particles in the ink composition is two times or more that of the water-soluble resin.

4. The ink jet recording method according to claim 1 , wherein the water-soluble resin has a glass transition temperature higher than that of the resin of the resin particles by 10° C. to 100° C.

5. The ink jet recording method according to claim 1 , wherein the water-soluble resin has a glass transition temperature of 90° C. or more, and the resin of the resin particles has a glass transition temperature of less than 90° C.

6. The ink jet recording method according to claim 1 , wherein the resin of the resin particles includes an acrylic resin, and the water-soluble resin includes a urethane resin.

7. The ink jet recording method according to claim 1 , wherein the non-white ink composition includes a clear ink composition, and

the non-white ink adhesion step adheres the clear ink composition to the recording medium by ejection thereof from an ink jet head to form a clear ink layer.

8. The ink jet recording method according to claim 1 , wherein the aggregating agent contained in the treatment liquid contains a polyvalent metal salt, an organic acid, or a cationic polymer.

9. The ink jet recording method according to claim 1 , wherein in the non-white ink adhesion step or the white ink adhesion step, the recording medium has a surface temperature of 45° C. or less when the ink composition is adhered thereto.

10. The ink jet recording method according to claim 1 , further comprising a post-heating step of, after the treatment liquid adhesion step, the non-white ink adhesion step, and the white ink adhesion step, heating the recording medium,

wherein the recording medium has a surface temperature of 90° C. or less in the post-heating step.

11. The ink jet recording method according to claim 1 , wherein the non-white ink composition includes a non-white color ink composition, and

the non-white ink adhesion step adheres the non-white color ink composition to the recording medium by ejection thereof from an ink jet head to form a non-white color ink layer as the non-white ink layer.

12. The ink jet recording method according to claim 1 , wherein the white ink adhesion step forms the white ink layer on the non-white ink layer formed by the non-white ink adhesion step.

13. An ink set which includes a white ink composition, a non-white ink composition, and a treatment liquid containing an aggregating agent and which is used for a recording method to be performed on a recording medium,

the recording method comprising:

a treatment liquid adhesion step of adhering the treatment liquid to the recording medium to form a treatment liquid layer;

a non-white ink adhesion step of adhering the non-white ink composition to the recording medium by ejection thereof from an ink jet head to form a non-white ink layer; and

a white ink adhesion step of adhering the white ink composition to the recording medium by ejection thereof from an ink jet head to form a white ink layer,

wherein the recording medium has a region in which the non-white ink layer, the white ink layer, and the treatment liquid layer are overlapped,

at least one of the white ink composition and the non-white ink composition contains resin particles and a water-soluble resin, or one of the white ink combination and the non-white ink composition contains resin particles, and the other contains a water-soluble resin,

the water-soluble resin has a glass transition temperature higher than that of a resin of the resin particles,

the glass transition temperature of the water-soluble resin is in the range of 90 to 200° C., and

the water-soluble resin is dissolved in a medium of the ink composition.