INK-JET INK, METHOD FOR ALLEVIATING KOGATION ON SURFACE OF HEATER OF INK-JET RECORDING HEAD, METHOD FOR INK-JET RECORDING, INK-JET RECORDING APPARATUS, RECORDING UNIT AND METHOD FOR PROLONGING INK-JET RECORDING HEAD LIFE
First Claim
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1. An aqueous ink for ink-jet recording comprising:
- (a) a pigment as a coloring material;
(b) an aqueous liquid medium; and
(c) an ammonium salt of an acid having a methyl or methylene group and a carboxylic group.
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Abstract
An ink for ink-jet recording which comprises (a) a coloring material, (b) a liquid medium, and (c) an ammonium salt of an acid having a methyl or methylene group and a carboxylic group, or an ammonium aldonate, or an ammonium salt of citric acid, to alleviate kogation of the ink-jet head heater having an outermost protecting layer containing at least one of a metal and a metal oxide.
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Citations
14 Claims
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1. An aqueous ink for ink-jet recording comprising:
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(a) a pigment as a coloring material;
(b) an aqueous liquid medium; and
(c) an ammonium salt of an acid having a methyl or methylene group and a carboxylic group. - View Dependent Claims (2, 3, 4, 5, 10)
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6. An aqueous ink for ink-jet recording comprising:
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(a) a pigment as a coloring material;
(b) an aqueous liquid medium; and
(c) an ammonium aldonate. - View Dependent Claims (7)
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8. An aqueous ink for ink-jet recording comprising:
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(a) a pigment as a coloring material;
(b) an aqueous liquid medium; and
(c) at least one or more compounds selected from the group consisting of monoammonium citrate, diammonium citrate, and triammonium citrate. - View Dependent Claims (9)
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11. An aqueous ink for ink-jet recording, used together with an ink-jet recording head provided with a heater covered with an outermost protective layer comprising at least one of a metal and a metal oxide, the ink jet recording head discharging the ink by action of said heater, the aqueous ink comprising:
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(a) a pigment as a coloring material;
(b) an aqueous liquid medium; and
(c) an ammonium salt of an acid having a methyl or methylene group and a carboxylic group, wherein the ink removes an adherent on the surface of the ink-jet recording head when energy is applied to said heater and the ink is in contact with said heater. - View Dependent Claims (14)
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12. An aqueous ink for ink-jet recording, used together with an ink jet recording head provided with a heater covered with an outermost protective layer comprising at least one of a metal and a metallic oxide, the ink jet recording head discharging an ink by action of said heater, the aqueous ink comprising:
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(a) a pigment as a coloring material;
(b) an aqueous liquid medium; and
(c) at least an ammonium aldonate, wherein the ink removes an adherent on the surface of the ink-jet recording head when energy is applied to said heater and the ink is in contact with said heater.
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13. An aqueous ink for ink-jet recording, used together with ink jet recording head provided with a heater covered with an outermost protective layer comprising at least one of a metal and a metal oxide, the ink jet recording head discharging an ink by action of said heater, the aqueous ink comprising:
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(a) a pigment as a coloring material, (b) an aqueous liquid medium, and (c) at least a compound selected from the group consisting of monoammonium citrate, diammonium citrate, and triammonium citrate, wherein the ink removes an adherent on the surface of the ink-jet recording head when energy is applied to said heater and the ink is in contact with said heater.
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Specification