Patent ID: 7935742

Claim:
An ink composition comprising: a polymerizable compound; (B) a polymerization initiator; and (C) a colorant, wherein the polymerizable compound consists of a radical polymerizable compound, the radical polymerizable compound comprises one type of radical polymerizable compound (monomer (A)) selected from the group consisting of a difunctional (meth)acrylic acid ester or amide having a straight chain alkylene group of 8 to 12 carbons, and a difunctional vinyl ether having a straight chain alkylene group of 8 to 12 carbons and (D) another radical polymerizable compound, the polymerization initiator (B) consists of a radical polymerization initiator, the other radical polymerizable compound (D) comprises a vinyl ether compound, and the monomer (A) is one type of compound selected from the group consisting of 1,8-octane diacrylate, 1,9-nonane diacrylate, 1,10-decane diacrylate, 1,11-undecane diacrylate, 1,12-dodecane diacrylate, 1,8-octane dimethacrylate, 1,9-nonane dimethacrylate, 1,10-decane dimethacrylate, 1,11-undecane dimethacrylate, 1,12-dodecane dimethacrylate, 1,8-octane diacrylamide, 1,9-nonane diacrylamide, 1,10-decane diacrylamide, 1,11-undecane diacrylamide, 1,12-dodecane diacrylamide, 1,8-octane divinyl ether, 1,9-nonane divinyl ether, 1,10-decane divinyl ether, 1,11-undecane divinyl ether, and 1,12-dodecane divinyl ether.