Water-based inkjet yellow ink, ink set, and method for producing printed matter
AssigneesToyo Ink Sc Holdings Co., Ltd., Toyocolor Co., Ltd.
InventorsAtsushi YODA, Kazuhiro JONAI, Norio SUZUKI
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Abstract
One embodiment relates to a water-based inkjet yellow ink containing a yellow pigment (A) having a specific partial structure, an organic solvent, a basic organic compound, and water, wherein an amount of the yellow pigment (A) is 1 to 10% by mass of a total mass of the water-based inkjet yellow ink, the basic organic compound contains 0.1 to 1.25% by mass of a basic organic compound (B) having a pKa value of 9.5 or less at 25° C. of the total mass of the water-based inkjet yellow ink, and an amount of an organic solvent having a boiling point of 240° C. or higher under 1 atmosphere is 5% by mass or less of the total mass of the water-based inkjet yellow ink.
Claims12
A water-based inkjet yellow ink comprising:
- a yellow pigment (A) having a partial structure represented by general formula (1), an organic solvent, a basic organic compound, and water, wherein
- an amount of the yellow pigment (A) is 1 to 10% by mass of a total mass of the water-based inkjet yellow ink;
- the basic organic compound contains 0.1 to 1.25% by mass of a basic organic compound (B) having a pKa value of 9.5 or less at 25° C. of the total mass of the water-based inkjet yellow ink, and
- an amount of an organic solvent having a boiling point of 240° C. or higher under 1 atmosphere is 5% by mass or less of the total mass of the water-based inkjet yellow ink,
- General formula (1):
- wherein, general formula (1) has at least one bonding site, and
- in general formula (1),
- X1 and X2 represent both ═O or both ═CR6R7, or X1 is ═O and X2 is ═NR8,
- each R1 to R4 independently represents a hydrogen atom or a halogen atom,
- R5 represents a hydrogen atom or a bonding site, and
- each R6 to R8 represents a bonding site.
Dependencies are inferred from the claim text.