This invention concerns a composition for use as an additive in an ink composition for an inkjet printer or a laserjet printer or as a coating on paper or plastic substrate used in an inkjet or laserjet printer which improves lightfastness and durability properties of the ink, which additive composition...http://www.google.com.au/patents/US6056812?utm_source=gb-gplus-sharePatent US6056812 - Composition to improve colorfastness of a printed image
