A composition comprising: (a) a leuco composition; and (b) a stabilizing amount of an antioxidant composition. The antioxidant composition comprises at least one sterically hindered phenol and at least one substituted diarylamine, and the mole ratio of the hindered phenol to the substituted diarylamine is greater than 1:1. In another embodiment, a composition comprises (a) a leuco composition and (b) an antioxidant composition; and optionally (c) a solvent composition. The combined mass of the leuco compounds and antioxidants present in the composition is 10% or more of the total mass of the composition, and (b) the molar ratio of antioxidants present in the composition to leuco compounds present in the composition is greater than 1:1.

Dispersion is obtained by: blending a specific resin emulsion for protecting a tungsten-based infrared-absorbing pigment; and dispersing the tungsten-based infrared-absorbing pigment in a state of being coated in advance by means of the resin emulsion.

Provided herein are color charts and water color pigment solutions useful, for example, in the calibration of reflectance-based diagnostic analyzers.

The present invention relates to a magenta ink for inkjet recording containing at least one pigment selected from the group consisting of C.I. Pigment Red 147, 150, 176, 266 and 269, in an amount of 0.5 to 10% by mass relative to the total mass of the ink. The present invention can provide a magenta ink that is comprehensively superior in terms of light resistance, color development and storage stability. The present invention can also provide an ink set having excellent light resistance and color development for each ink included in the ink set, and an inkjet recording method that uses the ink set.

Fluorescent resin particles which comprise a water-soluble fluorescent dye and a polymer made from a monomer mixture.

A method of producing an organic pigment composition including at least organic pigment microparticles, wherein a diffuse reflectance of the organic pigment microparticles is controlled for the purpose of improving a luminance of a color filter. The luminance of the color filter is controlled to be high, by controlling a ratio of an area of the diffuse reflectance in a target wavelength range to a total area of the diffuse reflectance in the entire measurement wavelength range in a diffuse reflection spectrum of the organic pigment microparticles in the wavelength range of 380 to 780 nm, to be high. The luminance of the color filter is controlled to be high, by coating at least a part of the surface of the organic pigment microparticles with an oxide.

Provided is a pigment composition that includes an isoindoline compound, has excellent dispersibility, weather resistance and heat resistance, and good storage stability, and is capable of forming images having high chroma and the like, the pigment composition including an isoindoline compound represented by formula (1) and an isoindoline compound represented by formula (2). Also provided are a colorant composition, a coating material, an ink, an ink set, a printed matter, and a packaging material.

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A color material dispersion liquid comprising: (A) a color material, (B) a dispersant and (C) a solvent, wherein the color material (A) contains a lake color material of a combination of an acid dye and a polyaluminum chloride; a basicity of the polyaluminum chloride is 70% or more; and a value of a ratio (I.sub.4/I.sub.6) between an integral value (I.sub.4) of a peak corresponding to a four-coordinate aluminum in a solid-state .sup.27Al-NMR spectrum of the lake color material and an integral value (I.sub.6) a peak corresponding to a six-coordinate aluminum therein, is from 0 to 0.50.

An ink jet ink composition contains a disperse dye, and a compound represented by the following formula (1):

##STR00001##

In the formula, Ar.sub.1 and Ar.sub.2 each independently represent an aryl group; R.sub.1 and R.sub.2 each independently represent a chemical species selected from the group consisting of hydrogen, alkyl groups having a carbon number of 1 to 3, a sulfo group, OSO.sub.3H, a carboxy group, and a hydroxy group; and n's each independently represent an integer of 0 to 5.

A mixture contains a compound having a specific structure and acting as a dye and a compound having a specific structure and acting as an ultraviolet light absorbent.