| abstract |
[PROBLEMS] To provide a recording ink or the like which is excellent in storage stability, has improved ejection stability, particularly ejection stability during continuous ejection or after ejection suspension, and can obtain high image quality with little bleeding. A colorant, a surfactant, a penetrant, and an antifoaming agent, containing 3.0 × 10 7 (particles / 5 μl) or less coarse particles having a particle size of 0.5 μm or more, and a particle size of 1 μm A recording ink in which the amount of the particles having a particle size of not less than 5 μm in the coarse particles is 1% by number or less. An embodiment in which the colorant has at least one hydrophilic group and shows at least one of water dispersibility and water solubility in the absence of a dispersant, wherein the surfactant is a polyoxyethylene alkyl ether surfactant and a polyoxyethylene An embodiment in which at least one selected from an alkyl ether acetate surfactant is used, and the penetrating agent is at least one of 2,2,4-trimethyl-1,3-pentanediol and 2-ethyl-1,3-hexanediol. Or an embodiment in which the antifoaming agent is selected from silicone antifoaming agents. [Selection diagram] None |