Patent ID: 7862653

Claim:
An aqueous ink comprising: water; a water-soluble organic solvent; a surfactant; and a coloring material, wherein the surfactant is a polyoxyethylene alkyl ether having a HLB value, as determined by the Griffin method, of 12.9 or more to 15.5 or less, wherein the content (mass %) of the surfactant is from 0.10 mass % or more to 0.75mass % or less based on the total mass of the aqueous ink, wherein a dynamic surface tension 25Â° C. at a lifetime of 50 milliseconds, as determined by a maximum bubble pressure method, is 49 mN/m or more, and wherein a dynamic surface tension 25Â° C. at a lifetime of 5,000 milliseconds, as determined by the maximum bubble pressure method, is 38 mN/m or less.