Patent ID: 7690762

Claim:
An ink-jet recording apparatus comprising: a recording head which discharges an ink onto a recording medium to perform recording and which is formed by stacking a plurality of thin metal plates with an adhesive; a restoring unit which includes a suction cap for detachably covering a nozzle surface of the recording head, and a suction pump for sucking the ink contained in the recording head through the suction cap; and an ink container which accommodates the ink to be supplied to the recording head, wherein a surface tension of the ink is not less than 40 mN/m, and an amount of dissolved oxygen contained in the ink is not more than 4 mg/L; wherein an ink flow passage, which is communicated with a nozzle of the nozzle surface, is formed in the recording head, and the adhesive is exposed to a wall surface of the ink flow passage; and wherein wettability between the ink and the adhesive is lower than wettability between the ink and the thin metal plates.