Patent ID: 8129447

Claim:
An ink composition, comprising: (i) a sensitizing dye that has a polymerizable substituent and is represented by the following Formula (I) or Formula (II): wherein in Formula (I), X represents O, S, or NR a ; n1 represents 0 or 1; and R a , R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , or R 10 each independently represent a hydrogen atom or a monovalent substituent, provided that at least one of R a , R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , or R 10 has a polymerizable group selected from the group consisting of an acryloyl group, a methacryloyl group, a styryl group, a vinyl group, a vinyl ester group and an allyl group; wherein in Formula (II), X represents O, S, or NR b ; n2 represents 0 or 1; and R b , R 11 , R 12 , R 13 , R 14 R 15 , R 16 , R 17 , or R 18 independently represent a hydrogen atom or a monovalent substituent, provided that at least one of R b , R 11 , R 12 , R 13 , R 14 R 15 , R 16 , R 17 , or R 18 has a polymerizable unsaturated double bond; and wherein any adjacent two of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , or R 14 may be joined to form a ring; (ii) a polymerization initiator, and (iii) a polymerizable compound having an ethylenically unsaturated bond.