| 摘要 |
Provided is an ink composition capable of forming images having excellent water resistance, excellent solvent resistance and excellent adhesiveness to base materials, the ink composition including (Component A) a polymer containing a repeating unit (a1) having at least one of an aromatic ketone structure and an aliphatic 1,2-diketone structure, a repeating unit (a2) having at least one of a tertiary amine structure and a thiol structure, and a repeating unit (a3) having an ethylenically unsaturated double bond, and (Component B) a coloring material.
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