Patent ID: 7901500

Claim:
An ink jet recording apparatus comprising: an ink set; an ink storage portion storing the ink set; and a recording head for ejecting the ink set in both an approaching route of a printing pass and a returning route of the printing pass, wherein: the ink set comprises at least three kinds of black inks, the at least three kinds of black inks are different from one another in carbon black content in ink, the at least three kinds of black inks comprise a black ink Bk1 having a largest carbon black content, a light black ink Lk2 having a smallest carbon black content, and a light black ink Lk1 having a carbon black content smaller than that of the black ink Bk1 and larger than that of the light black ink Lk2, the black ink Bk1, the light black ink Lk1, and the light black ink Lk2 each comprise a resin, a ratio (Bk1/Lk2) of the carbon black content in the black ink Bk1 to the carbon black content in the light black ink Lk2 is in a range of 3.5 or more to 9.0 or less, a ratio (Lk1/Lk2) of the carbon black content in the light black ink Lk1 to the carbon black content in the light black ink Lk2 is in a range of 2.0 or more to 4.0 or less, the carbon black content (mass %) in the black ink Bk1 is in a range of 2.5 mass % or more to 4.5 mass % or less with respect to a total mass of the black ink Bk1, the recording head ejects the at least three kinds of black inks on to a recording medium in a different order in the approaching route of the printing pass from that in the returning route of the printing pass, and at least one of the at least three kinds of black inks contains polyethylene glycol having an average molecular weight of 1,000.