Ink jet head cartridge, ink tank cartridge using degradeable plastic as part of construction or package thereof and ink jet apparatus having fitting part for the cartridges

An ink jet cartridge comprising an ink jet head having a discharge opening for discharging ink and an ink tank integrally communicated with the ink jet head and storing ink supplied to the ink jet head, wherein the ink tank has a storing member for storing ink and a case body for housing the storing member and wherein the storing member is made of a photodegradable plastic of which a degradation is promoted by an irradiation of light and the case body is made of a biodegradable plastic of which a degradation is promoted by microorganism.

An ink tank comprising a bag type container which stores ink and a case which houses the container, wherein at least one part of the ink tank is made of a degradable plastic and a means for supplying degradation which can supply water or microbial cells at the end of ink consumption for obtaining a suitable degradation of the degradable plastic is provided.

A package housing for an exchangeable member for an ink jet apparatus comprising a container for housing the exchangeable member, wherein the container has biodisintegrable property caused by dispersing a biodegradable material in a synthetic plastic material.