Disclosed herein is an ink set for use in ink-jet recording, which comprises at least 2 ink compositions the solid content concentrations of which are different by more than 2% by mass. The at least 2 ink compositions each comprise an aqueous medium, a pigment and a dispersant for dispersing the pigment....http://www.google.de/patents/US7528180?utm_source=gb-gplus-sharePatent US7528180 - Ink set for use in ink-jet recording, image forming process and image recording apparatus
