Problem: To provide a microencapsulated color material for an ink composition which is excellent in dispersion stability, ejection stability and color developability, excellent in fastness and rubbing resistance of images, and hard to cause blurs of images, and can provide recorded matter having high print density; an ink composition using the color material; a production process thereof; an ink jet recording process; recorded matter; and microencapsulated matter. Means for Resolution: A surface of a core material including color material particles such as a pigment is covered with a wall material mainly comprising: 1) a polymer (A) having an ionic group and a hydrophobic group; and 2) a polymer (B) having at least: repeating structural units derived from a first polymerizable surfactant having an ionic group with a charge opposite to the charge of the ionic group of the polymer, a hydrophobic group and a polymerizable group; and repeating structural units derived from a second polymerizable surfactant having a charge of the same kind as or opposite to the charge of the first polymerizable surfactant, and/or a hydrophilic monomer having a charge of the same kind as or opposite to the charge of the ionic group of the polymer and/or a hydrophobic monomer, thereby performing microencapsulation. The color material particles such as the pigment are used as the core material, and a color material obtained by microencapsulating them is allowed to be contained in an aqueous medium to form an ink composition, which is ejected from an ink head onto a recording medium by an ink jet recording process, thereby obtaining recorded matter. By constituting the core material by a pharmaceutical preparation, a metal powder, a ceramic or the like, surface modification of the core material becomes possible.