Cosmetic ink, ink jet ink and ink cartridge including the same, and method for producing cosmetic sheet

An ink jet printing ink comprising a cosmetic ink including:

• (A) a plurality of colorants selected from the combination of at least a white-based colorant, a red-based colorant, a yellow-based colorant, and a blue-based colorant, wherein the mass ratio of the blue-based colorant content to the total amount of (A) colorant is 0.25 or more and 1.0 or less
• (B) a higher alcohol having 3 or more carbon atoms;
• (C) purified water;
• (D) an acrylic-based resin including a copolymer of two or more acrylic-based monomer species, the acrylic-based resin being present in an amount of 0.1 mass % or more and 10 mass % or less of the cosmetic ink;
• and
• (E) a film-forming agent being at least one selected from the group consisting of acrylic-based polymers, polysaccharide-based polymers, sugar alcohol, sterols, esters, and modified corn starch, the film-forming agent present in an amount of 0.3 to 20 parts by mass of the cosmetic ink,
• wherein a spectral reflectance curve obtained by measuring spectral reflectances in wavelengths of 400 nm to 700 nm of a coating film of the cosmetic ink has a first inflection point in a wavelength region of 550 nm or more and 610 nm or less, and a second inflection point in a wavelength region of less than 550 nm,
• a spectral reflectance at the first inflection point is higher than a spectral reflectance at the second inflection point, and
• spectral reflectances throughout a wavelength region of more than 580 nm are equal to or higher than a spectral reflectance at a wavelength of 580 nm.

An ink cartridge comprising a cosmetic ink including:

• (A) a plurality of colorants selected from the combination of at least a white-based colorant, a red-based colorant, a yellow-based colorant, and a blue-based colorant, wherein the mass ratio of the blue-based colorant content to the total amount of (A) colorant is 0.25 or more and 1.0 or less;
• (B) a higher alcohol having 3 or more carbon atoms;
• (C) purified water;
• (D) an acrylic-based resin including a copolymer of two or more acrylic-based monomer species, the acrylic-based resin being present in an amount of 0.1 mass % or more and 10 mass % or less of the cosmetic ink;
• and
• (E) a film-forming agent being at least one selected from the group consisting of acrylic-based polymers, polysaccharide-based polymers, sugar alcohol, sterols, esters, and modified corn starch, the film-forming agent present in an amount of 0.3 to 20 parts by mass of the cosmetic ink,
• wherein a spectral reflectance curve obtained by measuring spectral reflectances in wavelengths of 400 nm to 700 nm of a coating film of the cosmetic ink has a first inflection point in a wavelength region of 550 nm or more and 610 nm or less, and a second inflection point in a wavelength region of less than 550 nm,
• a spectral reflectance at the first inflection point is higher than a spectral reflectance at the second inflection point, and
• spectral reflectances throughout a wavelength region of more than 580 nm are equal to or higher than a spectral reflectance at a wavelength of 580 nm.