The invention relates to an ink cartridge comprising a liquid ink, an extraction system for the liquid ink and a container for the liquid ink, the container having a non zero water vapor transmission rate, the liquid ink occupying a first region 411 of the container, the ink cartridge further comprising a second liquid, the second liquid occupying a second region 421 of the container, whereby the first and the second region are separated, and whereby the extraction system is in communication with the first region but is not in communication with the second region.