Problem to be Solved

It is intended to provide a yellow colorant composition having improved chroma and lightness, a pigment composition therefor, and use thereof for forming images.

Solution

The present invention provides a colorant composition containing a yellow pigment, a yellow fluorescent dye, and a resin binder, wherein the maximum reflectance wavelength in the visible reflection spectrum of a coating film consisting of the fluorescent dye and the resin binder without comprising the yellow pigment falls within the range of 490 to 535 nm, and the maximum reflectance of the coating film is 90 to 140%.

A solventborne pigment dispersion having a volatile organic chemical (VOC) content that is less than 250 g/L for tinting solvent-based surface coatings is formulated using a vegetable oil-derived solvent component that is one or more methyl esters of vegetable oils, an acrylic resin containing at least 60% solids, one or more highly concentrated surfactants containing up to 100% by weight of active constituents and that contains no PMA or free aromatic moieties, and one or more organic pigments or one or more inorganic pigment, or a combination thereof.

A colorant composition comprising a copper phthalocyanine pigment, a fluorescent dye, and a resin binder, wherein the hue angle of a coating from the composition on white paper is 236 or less, and the fluorescent material provides a maximum reflectance of 90 to 130% in the visible reflection spectrum of a coating film consisting of the fluorescent dye and the resin binder without comprising the copper phthalocyanine pigment.