INK CARTRIDGE AND INK JET RECORDING METHOD

摘要

An ink cartridge including a housing formed with a resin and an ink stored in the housing, wherein the resin includes a white mica composition; the ink includes a salt and a self-dispersible pigment having a functional group that contains two phosphonic acid groups and is bonded to the particle surface thereof; the salt includes a specific cation and a specific anion; and an amount of calcium in the ink after the ink is preserved in the housing at 60° C. for 2 months is 10.0 ppm or less.