To provide an ink cartridge capable of supplying a large quantity of ink sufficient for forming a high density blur-free image stably to an ink printer requiring enhancement of print quality and print speed.
The ink cartridge comprises ink containing a coloring agent, i.e. a dispersant capable of dispersing a dye included in a polymer to water, wherein the quantity of aromatic ring in the polymer is 20-70% and the quantity of polyvalent anion contained in the liquid component is 1,000 ppm or less, and a cartridge arranged to divide an ink containing chamber into upper and lower ink containing chambers and to pump up ink from the lower ink containing chamber to the upper ink containing chamber before the ink is supplied to a recorder through a negative pressure generating means (a diaphragm valve).
KOMATSU HIDEHIKO
Fujitsuna Hideyoshi
Osamu Suzawa
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