Ink jet recording method and ink jet recording apparatus

1. An ink jet recording method with use of an ink jet recording apparatus that includes an aqueous ink; a first ink storage portion that stores the aqueous ink; a second ink storage portion that is connected to the first ink storage portion through a tube, and stores the aqueous ink without impregnating the aqueous ink into an absorbent; and a recording head that is connected to the second ink storage portion and has formed therein an ejection orifice through which the aqueous ink supplied from the second ink storage portion is ejected, the method comprising:

applying the aqueous ink ejected through the ejection orifice onto a recording medium to record an image,

wherein the second ink storage portion and the recording head comprise therein an ink flow path through which the aqueous ink is supplied, a filter that partitions an upstream side and a downstream side of the ink flow path is arranged in the ink flow path, and a ratio (AB) of a volume A (mL) of the ink flow path to the upstream side and a volume B (mL) of the ink flow path on the downstream side is 5 or more to 50 or less,

wherein the aqueous ink comprises a coloring material, a nonionic surfactant, and a first water-soluble organic solvent having a relative dielectric constant of 30.0 or less, and

wherein the ink jet recording apparatus is an apparatus that records an image on the basis of reciprocatingly scanning motion of the recording head.

2. The ink jet recording method according to claim 1 , wherein a mass ratio of a content (% by mass) of the first water-soluble organic solvent to a content (% by mass) of the nonionic surfactant is 5.0 times or more.

3. The ink jet recording method according to claim 1 , wherein the nonionic surfactant has an HLB value of 8.0 or more.

4. The ink jet recording method according to claim 1 , wherein the nonionic surfactant is at least one of a hydrocarbonaceous surfactant and a fluorochemical surfactant.

5. The ink jet recording method according to claim 1 , wherein a moving rate of the recording head in the reciprocatingly scanning motion is 30 inches/second or more.

6. The ink jet recording method according to claim 1 , wherein the image is recorded by applying the aqueous ink to a unit region of the recording medium, as a result of a single-relative scanning between the recording head and the recording medium.

7. An ink jet recording apparatus comprising:

an aqueous ink;

a first ink storage portion that stores the aqueous ink;

a second ink storage portion that is connected to the first ink storage portion through a tube, and stores the aqueous ink without impregnating the aqueous ink into an absorbent; and

a recording head that is connected to the second ink storage portion and has formed therein an ejection orifice through which the aqueous ink supplied from the second ink storage portion is ejected,

wherein the second ink storage portion and the recording head comprise therein an ink flow path through which the aqueous ink is supplied, a filter that partitions an upstream side and a downstream side of the ink flow path is arranged in the ink flow path, and a ratio (A/B) of a volume A (mL) of the ink flow path to the upstream side and a volume B (mL) of the ink flow path on the downstream side is 5 or more to 50 or less,

wherein the aqueous ink comprises a coloring material, a nonionic surfactant, and a first water-soluble organic solvent having a relative dielectric constant of 30.0 or less, and

wherein the ink jet recording apparatus is an apparatus that records an image on the basis of reciprocatingly scanning motion of the recording head.

8. The ink jet recording method according to claim 1 , wherein the ratio (A/B) of the volume A (mL) of the ink flow path to the upstream side and the volume B (mL) of the ink flow path on the downstream side is 5 or more to 40 or less.

9. The ink jet recording method according to claim 1 , wherein a maximum volume of an ink storage V 1 (mL) of the first ink storage portion is 60 mL or more to 300 mL or less.

10. The ink jet recording method according to claim 1 , wherein a maximum volume of an ink storage volume V 2 (mL) of the second ink storage portion is 1 mL or more to 20 mL or less.

11. The ink jet recording method according to claim 1 , wherein the first ink storage portion and the second ink storage portion are connected by an ink supply tube without interposing any other ink storage portion in between.

12. The ink jet recording method according to claim 1 , wherein the first ink storage portion has formed therein an ink inlet port through which the aqueous ink is filled from outside of the ink jet recording apparatus into the first ink storage portion.

13. The ink jet recording method according to claim 1 , wherein a moving rate of the recording head in the reciprocatingly scanning motion is 70 inches/second or less.

14. The ink jet recording method according to claim 1 , wherein the first water-soluble organic solvent has a relative dielectric constant of 3.0 or more.

15. The ink jet recording method according to claim 1 , wherein a mass ratio of a content (% by mass) of the first water-soluble organic solvent to a content (% by mass) of the nonionic surfactant is 7.0 times or more to 50.0 times or less.

16. The ink jet recording method according to claim 1 , wherein the nonionic surfactant has an HLB value of 18.5 or less.

17. The ink jet recording method according to claim 1 , wherein a content (% by mass) of the coloring material in the aqueous ink is 0.1% by mass or more to 15.0% by mass or less, relative to the total mass of the ink.

18. The ink jet recording method according to claim 1 , wherein a content (% by mass) of the first water-soluble organic solvent in the aqueous ink is 3.0% by mass or more to 50.0% by mass or less, relative to the total mass of the ink.

19. The ink jet recording method according to claim 1 , wherein a content (% by mass) of a surfactant in the aqueous ink is 0.1% by mass or more to 5.0% by mass or less, relative to the total mass of the ink.

20. The ink jet recording method according to claim 1 , wherein the coloring material comprises a pigment.