| abstract |
Provided is an ink containing a colorant, an organic solvent, and water, wherein the ink contains as the organic solvent, at least one kind of an organic solvent having a solubility parameter of greater than or equal to 9 but less than 11.8, wherein a content of the organic solvent having a solubility parameter of greater than or equal to 9 but less than 11.8 is greater than or equal to 20% by mass of a total amount of the ink, wherein a dynamic surface tension A of the ink at 25° C. at a surface lifetime, measured by a maximum foaming pressure method, of 15 msec is less than or equal to 34.0 mN/m, and wherein the dynamic surface tension A and a static surface tension B of the ink at 25° C. satisfy a formula of 10.0%≦[(A−B)/(A+B)]×100≦19.0%. |