An ink includes water; a coloring material, and a polymer including a structure unit represented by the following Chemical formula 1 and a structure unit represented by the following Chemical formula 2 or the following Chemical formula 3,
where R and T each, independently represent hydrogen atoms or methyl groups, L and N each, independently represent single bonds or carbonyl groups, M and Q each, independently represent naphthyl groups or biphenyl groups, p represents an integer of from 2 to 12, and q represents an integer of from 1 to 3.
                            墨
水包括
水、着色材料和聚合物,聚合物包括由以下
化学式 1 表示的结构单元和由以下
化学式 2 或
化学式 3 表示的结构单元、
其中 R 和 T 各自独立地代表氢原子或甲基,L 和 N 各自独立地代表单键或羰基,M 和 Q 各自独立地代表
萘基或
联苯基,p 代表 2 至 12 的整数,q 代表 1 至 3 的整数。