| 摘要 |
An ink composition includes: a graft polymer having a graft main chain having at least one selected from the group consisting of a urethane structure and a urea structure, and a graft side chain including the following Structure Gs; a polymerizable compound; and a polymerization initiator, wherein the polymerizable compound comprises a monofunctional polymerizable compound, and a total content of the monofunctional polymerizable compound in the ink composition is 50% by mass or more with respect to a total content of the polymerizable compound, and wherein the Structure Gs comprises a structure having three or more repeating units, each of which is formed from an atomic group selected from the group consisting of a carbon atom, a hydrogen atom, an oxygen atom, a sulfur atom and a halogen atom, and in which an SP value of the repeating units is from 17 (MPa)1/2 to 20 (MPa)1/2. |
