Patent ID: 9469113
Filing Date: 2016-10-18
CPC Classification: B41J

Claim Text:
1. A method of introducing an ink, comprising: introducing a replacement assisting liquid into a recording head filled with a preservative solution to discharge the preservative solution out of the recording head, the replacement assisting liquid having a lower specific weight than the ink, the preservative solution containing at least a moisturizing agent and having a higher specific weight than the ink; and introducing the ink into the recording head to discharge the replacement assisting liquid out of the recording head after the replacement assisting liquid has been introduced into the recording head, wherein the preservative solution contains a surfactant in an amount of greater than 0% by mass and no greater than 2% by mass relative to the mass of the preservative solution, and wherein the surfactant in the preservative solution comprises an acrylic acid-based copolymer having an acid value of no less than 30 and no greater than 130.