INK, INK FOR INK JET, METHOD FOR REDUCING SCORCHED DEPOSIT TO HEATER, METHOD FOR INK JET RECORDING, APPARATUS FOR INK JET RECORDING, RECORDING UNIT AND METHOD FOR MAKING RECORDING HEAD HAVE LONG LIFE

摘要

PROBLEM TO BE SOLVED: To obtain an ink (for ink jet) capable of further reducing scorched deposits adhered to the surface of a heater for discharging the ink from a recording head by applying a thermal energy to the ink in the recording head and provide a method for reducing scorched deposits on the recording head and a method for ink jet recording and a recording method and apparatus capable of attaining a high quality printing and making the recording head have a long life.;SOLUTION: This ink contains (a) a colorant, (b) a liquid medium, (c) at least one species selected from a polyphosphoric acid, a dicarboxylic acid, a polyaminocarboxylic acid, aldonic acid, a hydroxycarboxylic acid, a polyol phosphate and a salt thereof and (d) an acid having an amino group and/or its salt. This ink jet ink uses the aforesaid ink. A method for reducing scorched deposits to the surface of a heater of the recording head, a method for ink jet recording, a recording apparatus, a recording unit and a method for making the recording head to have a long life are also provided in this invention.;COPYRIGHT: (C)2002,JPO