| 主权项 |
1. An ink jet recording apparatus comprising:
an ink set including: an ink composition for background containing a pigment for background and a fluorosurfactant, the pigment for background being either a white pigment or a glitter pigment and a coloring ink composition containing a coloring pigment, the coloring pigment being a pigment other than the white pigment or the glitter pigment; an ink cartridge containing the ink composition; a recording medium on which the ink composition is recorded; an ink jet recording head for discharging the ink composition to the recording medium; and an operation controller for selecting a recording mode on the recording medium, wherein: the operation controller selects A mode in which the ink composition for background is recorded on an image which has been recorded on the recording medium using the coloring ink composition, the recording medium which does not absorbs ink or absorbs ink to low degree, the surface tension of the ink composition for background is S1 (mN/m), and the surface tension of the coloring ink composition is S2 (mN/m), S1 and S2 satisfy −5<(S1−S2)<4, and a sedimentation speed v of the pigment for background that is represented by a formula v={(ρ−ρw)gR2}/(18η) is 2.0×10−6 (cm/s) or higher, where v represents a sedimentation speed (cm/s), ρ represents a pigment density (g/cm3), ρw represents a solvent density (g/cm3), g represents acceleration of gravity (m/s2), R represents a pigment diameter (cm), and η represents a solvent viscosity (Pa·s). |
