An ink is provided which is capable of forming a recorded image with improved water resistance and improved ozone resistance of recorded images which are not achievable by conventional aqueous inks employing a water-soluble dye as the coloring agent, and also capable of forming images having improved...http://www.google.com/patents/US6780901?utm_source=gb-gplus-sharePatent US6780901 - Ink, ink-jet recording method, ink-jet recording apparatus, and coloring material
