WATER-SOLUBLE PHTHALOCYANINE COMPOUND-CONTAINING INK FOR INKJETTING, INK JET RECORDING METHOD AND METHOD FOR IMPROVING OZONE GAS DISCOLORATION OF COLORED IMAGE MATERIAL

摘要

To provide an ink capable of giving an image having excellent (color) hue an d high fastness to light and ozone gas, an ink for ink jetting containing the ink, an ink jet recording method, and a method for enhancing the ozone resistance of an image. An ink comprising a water-soluble phthalocyanine compound, wherein in the spectral absorption curve of an aqueous solution of the phthalocyanine compound, the absorbance ratio b/a of the maximum absorbance b in the absorption band of 660 to 680 ran and the maximum absorbance a in the absorption band of 600 to 640 ran is less than 0.8 and t he counter ion for the ionic hydrophilic group of the phthalocyanine compound i s lithium ion.