Aqueous ink composition for ink jet-recording
AssigneeRicoh Company, Ltd.
InventorsMasaru Shimada, Toshiyuki Kawanishi, Kakuji Murakami, Tamotsu Aruga, Hiroyuki Uemura, Kiyofumi Nagai
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Abstract
An aqueous ink composition for ink-jet recording comprising an aqueous solution of a water-soluble dye of formula (I) and a humectant dissolved in water: ##STR1## wherein Ar represents an unsubstituted or substituted phenyl group, or an unsubstituted or substituted naphthyl group; X represents a hydroxyl group, an alkoxy group, a halogen atom, an alkylamino group, a hydroxyalkylamino group, a cyclic amino group or an anilino group; M represents hydrogen, K, Na, Li, NH.sub.4 or an organic amine cation; and n is an integer of 1 or 2.
Claims9
An aqueous ink composition for ink-jet recording comprising an aqueous solution of a water-soluble dye of formula (I) and a humectant dissolved in water:
- ##STR28## wherein Ar represents an unsubstituted or substituted phenyl group, or an unsubstituted or substituted naphthyl group;
- X represents a hydroxyl group, an alkoxy group, halogen, an alkylamino group, a hydroxyalkylamino group, a cyclic amino group or an anilino group;
- M represents hydogen, K, Na, Li, NH.sub.4 or an organic amine cation;
- and n is an integer of 1 or 2.
Dependencies are inferred from the claim text.