Patent ID: 7601291

Claim:
An ink-jet recording apparatus comprising an elastic member being employed in at least a part of an ink passage into which a water-based ink for ink-jet recording is filled, wherein the ink-jet recording apparatus is configured to satisfy the following inequality (1): ( T 1 /T 0 )×100≦about 200% (1), wherein T 1 is filtration time when 20 mL of a first ink is filtrated through an electroformed filter having an effective area of 7.6 cm 2 , about 16500 pores and a pore size of 13 μm, the first ink being prepared by immersing an elastic member in a water-based ink for ink-jet recording in a volume of 0.5 mL per 1 cm 2 of surface area of the elastic member at 60° C. for 14 days, and subsequently at room temperature for 7 days; and T 0 is filtration time when 20 mL of a second ink is filtrated through an electroformed filter having the same specifications as the above-mentioned electroformed filter, the second ink being prepared by allowing the same ink as the above-mentioned water-based ink to stand at 60° C. for 14 days and subsequently at room temperature for 7 days.