Water dispersion of gel particles, producing method thereof, and image forming method

A water dispersion of gel particles,

• wherein the gel particles have a three-dimensional crosslinked structure including a structural unit represented by Formula (1) and a urea bond, have a hydrophilic group and a polymerizable group, include photopolymerization initiators and are dispersed in water,
• R1 in Formula (1) represents a hydrogen atom or an alkyl group,
• X1 in Formula (1) represents a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, a cyano group, a lactam group, a —C(═O)X2R2 group, an —OC(═O)R3 group, or an aryl group,
• X2 represents an oxygen atom or an —N(RX2)— group, and RX2 represents a hydrocarbon group that may contain a hetero atom or a hydrogen atom,
• R2 represents a hydrocarbon group that may contain a hetero atom or a hydrogen atom, provided that, in a case in which X2 is an oxygen atom, R2 is not a hydrogen atom,
• R2 and RX2 may be bonded to each other to form a ring, and
• R3 represents a hydrocarbon group that may contain a hetero atom.