Provided is an ink including water, organic solvents, a color material, and resin particles, wherein the ink is used in a printing method including applying the ink onto a substrate including a resin to print, and the organic solvents include a compound, a diol compound including 3 or 4 carbon atoms, and 2-ethylhexyl alcohol, where the compound has a boiling point of 170° C. or higher and an absolute value of a difference between Fh of the compound represented by Mathematical Formula 1 and Fh of the resin in the substrate represented by Mathematical Formula 1 is 5% or less,
Fh(%)=[δH/(δD+δP+δH)]×100
where, in Mathematical Formula 1, δH is a hydrogen bond term of the Hansen solubility parameter, δD is a dispersion term of the Hansen solubility parameter, and δP is a polarity term of the Hansen solubility parameter.
提供了一种包括
水、有机溶剂、色料和
树脂颗粒的
油墨,其中该
油墨用于印刷方法,包括将该
油墨涂在包括
树脂的基材上进行印刷,有机溶剂包括化合物、包括 3 或 4 个
碳原子的二元醇化合物和
2-乙基己醇,其中化合物的沸点为 170° C 或更高,数学公式 1 所表示的化合物的 Fh 与数学公式 1 所表示的基材中
树脂的 Fh 之间差值的绝对值为 5%或更低、
Fh(%)=[δH/(δD+δP+δH)]×100
其中,δH 是汉森溶解度参数的
氢键项,δD 是汉森溶解度参数的分散项,δP 是汉森溶解度参数的极性项。