The present invention provides an ink composition including: a pigment, a water-soluble polymerizable compound having an acrylamide structure in a molecule thereof, a water-soluble solvent, and water, in which a mass ratio of the polymerizable compound and the water-soluble solvent satisfies 110\u2266BA\u226623. The main body is provided with a plurality of sets and each set includes an input terminal, an actuator, a pressure chamber and a nozzle. These parameters are derived by examining each layer’s absorption spectra, thermal, and chemical characteristics. A module definition is a collection of class definitions and other expressions in an object-oriented programming language. The bootstrapping circuit block is shared by the one or more output nodes, and amplifies the complementary signals.