Patent ID: 7709546

Claim:
An ink composition comprising: a compound represented by Formula (I) or (II), a monomer selected from the group consisting of a cationically polymerizable compound and a radically polymerizable compound, a polymerization initiator selected from the group consisting of an acid generator and a radical polymerization initiator, and a colorant wherein the compound represented by Formula (I) or (II) is a sensitizer having no coloration, wherein R 1 and R 2 independently denote a monovalent substituent, R 3 to R 6 independently denote a hydrogen atom or a monovalent substituent, n denotes an integer of 0 to 5, and n′ denotes an integer of 0 to 5; n and n′ are not both 0, when n is 2 or greater a plurality of R 1 s may be identical to or different from each other, and when n′ is 2 or greater a plurality of R 2 s may be identical to or different from each other.