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US 8,709,143 B2Granted
Water-based ink set for ink-jet recording, ink-jet recording method and ink-jet recording apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsShinpei Ito, Kazuma Goto
Life of this patent
Estimating the term…
Abstract
A water-based ink set for ink-jet recording includes: a water-based black ink containing a black colorant, water, and a water-soluble organic solvent; and a water-based cyan ink containing a cyan colorant, water, and a water-soluble organic solvent; wherein the black colorant includes a self-dispersible carbon black modified by at least one of a carboxyl group and a sulfo group; and the cyan colorant includes a dye represented by general formula (1):
Claims5
A water-based ink set for ink jet recording, comprising:
- a water-based black ink containing a black colorant, water, and a water-soluble organic solvent;
- and
- a water-based cyan ink containing a cyan colorant, water, and a water-soluble organic solvent;
- wherein the black colorant includes a self-dispersible carbon black modified by at least one of a carboxyl group and a sulfo group;
- and
- the cyan colorant includes a dye represented by general formula (I):
- in the general formula (I), each of rings A1, A2 and A3 is a benzene ring, 2,3-pyridine ring or 3,2-pyridine ring;
- at least one of the rings A1, A2 and A3 is the 2,3-pyridine ring or the 3,2-pyridine ring, and the rings A1, A2 and A3 are identical with or different from one another;
- “a” satisfies 0≦a≦4, “b” satisfies 0≦b≦4 and “c” satisfies 0≦c≦4, and a sum of “a”, “b”, “c” satisfies 0≦a+b+c≦4;
- “z” is an integer satisfying 1≦z≦3;
- and
- R0 is a straight chain alkyl group having 1 to 6 carbon atoms.
9 more elements
Dependencies are inferred from the claim text.