Patent ID: 7528180
Filing Date: 2009-05-05
Classification: C09D,Y10S

Abstract:
1. An ink set for use in ink-jet recording comprising at least 2 ink compositions having solid content concentrations which are different by more than 2% by mass, wherein said at least 2 ink compositions each comprise an aqueous medium, a pigment and a dispersant for dispersing the pigment, and the dispersant is an amphiphilic block copolymer having an A segment that is a hydrophobic segment, a B segment that is a nonionic hydrophilic segment, and a C segment that is an ionic hydrophilic segment, and wherein the number of unit structures of the B segment of the amphiphilic block copolymer contained in each of said at least 2 ink compositions is smaller in the amphiphilic block copolymer contained in the ink composition having a relatively high solid content concentration than in the amphiphilic block copolymer contained in the ink composition having a relatively low solid content concentration.