An ink includes a coloring material, one or more organic solvents, a resin particle including a structure unit having a carboxyl group and a structure unit having an alkoxysilyl group, and water. The one or more organic solvents includes at least one organic solvent having a solubility parameter of 8.96 to less than 11.8. The ink has a dynamic surface tension A of 34.0 mN/m or less for a surface life of 15 msec at 25 degrees C. according to maximum bubble pressure technique. The dynamic surface tension A and a static surface tension B of the ink at 25 degrees C. satisfy the following relation: 10.0 percent≤[(A−B)/(A+B)]×100≤19.0 percent.
一种油墨包括着色材料、一种或多种有机溶剂、包括具有羧基的结构单元和具有烷氧基
硅基的结构单元的
树脂颗粒以及
水。一种或多种有机溶剂包括至少一种溶解度参数为 8.96 至小于 11.8 的有机溶剂。根据最大气泡压力技术,在 25 摄氏度、表面寿命为 15 毫秒时,油墨的动态表面张力 A 为 34.0 毫牛顿/米或更低。油墨在 25 摄氏度时的动态表面张力 A 和静态表面张力 B 满足以下关系式:10.0%≤[(A-B)/(A+B)]×100≤19.0%.