abstract |
(57) [Problem] To improve water resistance, stain resistance, and drying time of a pigment-containing ink. The present invention comprises a macromolecular chromophore (MMC), an ionic surfactant and a zwitterionic or amphoteric surfactant. Ionic surfactants have the opposite polarity to MMC. MMC is surface treated with pigments to bind anionic or cationic functional groups. Zwitterionic surfactants improve water resistance, and ionic surfactants improve antifouling properties and provide fast drying times. |