申请人:MATSUSHITA Yasuaki
公开号:US20120236068A1
公开(公告)日:2012-09-20
An ink composition of the present invention includes a pigment (a), a water-soluble solvent (b), a surfactant (c), a compound represented by the following general formula (I) and/or a compound represented by the following general formula (II) (d), and water (e), wherein the content of the compound represented by the general formula (I) and/or the compound represented by the general formula (II) (d) in the ink composition is 0.15% by mass or less:
(in the general formula (I), R
1
and R
2
each independently represent a hydrogen atom, an aliphatic group, or an aromatic group); and
(in the general formula (II), R
3
and R
4
each independently represent a hydrogen atom, an aliphatic group, or an aromatic group, x+y equals 100, and z represents an integer of 5 or more).