Preparation of aqueous green inkjet compositions

A method of making an aqueous green inkjet ink composition, comprising:

• providing an aqueous organic pigment dispersion by
• mixing a green copper phthalocyanine pigment with an azo-coupled β-ketoamide pigment and at least one organic pigment dispersant such that the weight ratio of the green copper phthalocyanine pigment to the azo-coupled β-ketoamide pigment is from 1:1 to and including 10:1, and the median particle diameter of each of the green copper phthalocyanine pigment and the azo-coupled β-ketoamide pigment is less than 85 nm and at least 95% of the total particles of each of the green copper phthalocyanine pigment and the azo-coupled β-ketoamide pigment have a particle diameter of less than 150 nm, when measured in intensity mode using a laser light scattering particle size analyzer, and
• combining at least one humectant and the aqueous organic pigment dispersion such that the aqueous green inkjet ink composition has a viscosity of less than 3 centipoise (0.003 N-sec) at 25° C., and
• wherein the aqueous green inkjet ink composition exhibits CIELAB color characteristics of a* of at least −80 and up to and including −20, b* of at least 20 and up to and including 80, and L* of at least 20 and up to and including 90.