Patent ID: 7708397

Claim:
An ink-jet recording apparatus comprising: an ink passage through which at least one of a water-based ink and a preservation solution flows; and a rubber member in the ink passage, said rubber member being formed from an ethylene propylene diene rubber in which a sulfenamide-based vulcanization accelerator or a thiazole-based vulcanization accelerator is employed, wherein the water-based ink includes at least a coloring agent, water and a water-soluble organic solvent, and has a dynamic surface tension at a lifetime of 100 ms of about 35 mN/m to about 45 mN/m as measured by means of a maximum bubble pressure method at a measurement temperature of 25° C., and wherein the preservation solution includes at least water and a water-soluble organic solvent, and has a dynamic surface tension at a lifetime of 100 ms of about 30 mN/m to about 35 mN/m as measured by means of the maximum bubble pressure method at a measurement temperature of 25° C.