Oblon, McClelland, Maier & Neustadt, L.L.P.
Aqueous ink composition and image forming apparatus
Disclosed is an aqueous ink composition, including an aqueous solvent, a coloring agent dissolved or dispersed in the aqueous solvent, an ABA-type amphipathic polymer including a hydrophobic segment A and a hydrophilic segment B, and an anionic surfactant configured to dissolve or disperse the ABA-type amphipathic polymer in the aqueous solvent, wherein a viscosity of the aqueous ink composition is changed depending on a pH thereof.
Ricoh Company, Ltd.
C C C B B C
C08K C09D C09D B41J B41J C08K
additional inventional inventional inventional inventional additional
Takeshi Hisayoshi Takeo Yuuma Aino Hideomi Hiroyuki Manabu Shigeo Ryota Takahiko
Hihara Ohshima Tsukamoto Usui Hasegawa Sakuma Yamashita Seo Takeuchi Suzuki Matsumoto