Ink jet printer and ink for ink jet recording

摘要

An ink jet printer is disclosed, which jets a water-soluble ink from a recording head comprising at least an ink passage-forming member and an orifice through the orifice to form flying droplets which form a dot image on a recording medium, wherein at least a portion of the ink passage-forming member is composed of borosilicate glass and the water-soluble ink comprises at least one of urea and thiourea. Further, an ink for use in the ink jet printer is also disclosed.