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US 9,315,686 B2Granted
Water-based ink for ink-jet recording, water-based ink set for ink-jet recording, ink cartridge, and ink-jet recording method
AssigneeBrother Kogyo Kabushiki Kaisha
InventorAyako Ohishi
Life of this patent
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Abstract
A water-based ink for ink-jet recording includes a pigment; water; an acetylene glycol-based surfactant contained by 0.1% by weight to 0.3% by weight in the water-based ink; tripropylene glycol methyl ether contained by 2.5% by weight to 4.5% by weight in the water-based ink; and tripropylene glycol n-butyl ether contained by 0.5% by weight to 1.5% by weight in the water-based ink.
Claims15
A water-based ink for ink-jet recording comprising:
- a pigment;
- water;
- an acetylene glycol-based surfactant contained by 0.1% by weight to 0.2% by weight in the water-based ink;
- tripropylene glycol methyl ether contained by 3.5% by weight to 4.5% by weight in the water-based ink;
- and
- tripropylene glycol n-butyl ether contained by 0.5% by weight to 1.0% by weight in the water-based ink,
- wherein:
- a weight ratio (a/p) of the acetylene glycol-based surfactant (a) to the pigment (p) is in a range of 0.017/1 to 0.033/1;
- a weight ratio (b/p) of tripropylene glycol methyl ether (b) to the pigment (p) is in a range of 0.58/1 to 0.75/1;
- and
- a weight ratio (c/p) of tripropylene glycol n-butyl ether (c) to the pigment (p) is in a range of 0.083/1 to 0.17/1.
8 more elements
Dependencies are inferred from the claim text.