| abstract |
(57) [Problem] To provide a refillable water-based ink for an ink jet printer, which can provide a printed image having almost the same image quality as when a new ink cartridge is used. SOLUTION: An aqueous ink for an ink jet printer containing water, a colorant, an organic solvent and a surfactant has at least one of the following characteristics (1) and (2) as compared with the ink for initial filling. A refill ink for an inkjet printer, which is provided. (1) High surface tension (2) Low viscosity |