Ink composition, inkjet recording method, and printed matter
AssigneeRicoh Company, Ltd.
InventorAkihiko Matsuyama
Life of this patent
Estimating the term…
Abstract
The present invention provides an ink composition that contains a pigment, a dispersant, a hydrosoluble solvent; and water, wherein the pigment is represented by the following chemical formula 1: where R represents hydrogen, an alkyl group having one to three carbon atoms, or chlorine, wherein the ink composition satisfies the following relations 1 and 2: 0.050≦X/Y≦0.120 Relation 1 0.700≦Z/Y≦1.050 Relation 2 where X represents a minimum absorbance in a wavelength range of from 400 nm to 450 nm, Y represents an absorbance of a maximum peak in a wavelength range of from 500 nm to 550 nm, and Z represents an absorbance of a maximum peak in a wavelength range of from 550 nm to 600 nm.
Claims12
An ink composition comprising:
- a pigment;
- a hydrosoluble solvent;
- and
- water,
- wherein the pigment comprises a compound represented by the following Chemical Formula 1-1:
- wherein the ink composition satisfies the following relations 1 and 2:
- 0.050≦X/Y≦0.120 Relation 1
- 0.700≦Z/Y≦1.050 Relation 2
- where X represents a minimum absorbance in a wavelength range of from 400 nm to 450 nm, Y represents an absorbance of a maximum peak in a wavelength range of from 500 nm to 550 nm, and Z represents an absorbance of a maximum peak in a wavelength range of from 550 nm to 600 nm.
An ink composition comprising:
- a pigment;
- a hydrosoluble solvent comprising 2-pyrrolidone;
- and
- water,
- wherein the pigment comprises a compound represented by the following chemical formula 1-1:
- wherein the ink composition satisfies the following relations 1 and 2:
- 0.050≦X/Y≦0.120 Relation 1
- 0.700≦Z/Y≦1.050 Relation 2
- where X represents a minimum absorbance in a wavelength range of from 400 nm to 450 nm, Y represents an absorbance of a maximum peak in a wavelength range of from 500 nm to 550 nm, and Z represents an absorbance of a maximum peak in a wavelength range of from 550 nm to 600 nm.
An ink composition comprising:
- a pigment;
- a hydrosoluble solvent comprising 2-pyrrolidone;
- and
- water,
- wherein the pigment consists of a compound represented by the following chemical formula 1-1:
- wherein the ink composition satisfies the following relations 1 and 2:
- 0.050≦X/Y≦0.120 Relation 1
- 0.700≦Z/Y≦1.050 Relation 2
- where X represents a minimum absorbance in a wavelength range of from 400 nm to 450 nm, Y represents an absorbance of a maximum peak in a wavelength range of from 500 nm to 550 nm, and Z represents an absorbance of a maximum peak in a wavelength range of from 550 nm to 600 nm.
Dependencies are inferred from the claim text.