The present technology is directed to pigment compositions having a pure, or substantially pure, crystal form, containing less chlorine than standard tetrachlorinated copper phthalocyanine pigments, while giving similar color space, chromaticity, fastness properties, and color travel in automotive waterborne and solvent borne systems. These pigments are more advantageous from a toxicity and environmental perspective, and allow the manufacturer to produce pigments in a safe and economical manner.

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. The content of the compound represented by formula (1) is 0.1% by mass to 20% by mass relative to the total mass of the ink jet ink composition.

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.

There are disclosed aqueous pigment dispersions containing dispersant-improving-agents, and methods of preparing and using the same.

The present invention relates to a dispersion for an aqueous spray formulation with controlled mechanical degradation, said dispersion comprising a polymer composition and at least one liquid phase, wherein said polymer composition is dispersed in said at least one liquid phase, wherein said polymer composition comprises one or more water-soluble polymers, wherein said at least one liquid phase is an oil phase and/or an aqueous phase, and wherein said at least one liquid phase comprises at least one non-ionic surfactant with a HLB of more than 0, preferably of more than 12. The invention moreover relates to a method for controlling the mechanical degradation of such a dispersion, wherein said method comprises the steps of: providing the polymer composition, preparing the at least one liquid phase by mixing the at least one non-ionic surfactant with said at least one liquid phase, and preparing the suspension by dispersing the polymer composition of step i) in the at least one liquid phase of step ii). The invention also relates to the use of the dispersion for controlling mechanical degradation of an aqueous spray formulation and to a method for preparing an aqueous spray formulation by mixing the dispersion and water in a weight ratio of between 1:50 to 1:1000.

An object of the present invention is to provide an aqueous pigment dispersion that provides an aqueous ink for inkjet recording that contains a reduced number of coarse particles, is excellent in ejection stability, and is applicable to a printer equipped with a high-resolution inkjet head and to provide the aqueous ink for inkjet recording. The present invention relates to an aqueous pigment dispersion containing: a polymer (A) that has anionic groups, has a solubility in water of 0.1 g/100 mL or less and a number average molecular weight within the range of 1,000 to 6,000, and forms fine particles in water when the degree of neutralization of the anionic groups with a basic compound is 100%; a polyhalogenated metal phthalocyanine pigment or a diketopyrrolopyrrole pigment; and water. The invention also relates to an aqueous ink for inkjet recording.

The present invention relates to a colorant, a colored resin composition comprising the colorant, and a color filter prepared using the colored resin composition. A novel reddish yellow pigment may be used in combination with a green pigment and a yellow pigment in order to reduce the imbalance of the intramolecular polarization of the green pigment and/or the yellow pigment in the colorant. As a result, a color filter comprising a colored layer in which a light leakage phenomenon, caused by an electric field distortion, is reduced.

A copolymeric pigment dispersion resin derived from isobornyl (meth)acrylate and one or more other monomers has a number average molecular weight less than about 10,000 and is derived from sufficient isobornyl (meth)acrylate so that a 60 wt. % solution of the resin in propylene glycol monomethyl ether acetate forms a clear solution when combined at room temperature with at least three times the resin weight of odorless mineral spirits. The resin may be compatibly mixed with solvent-borne coating compositions based on polar or on non-polar solvents, and can provide a single factory shader or point-of sale colorant formulation for tinting a wide range of such coating compositions.

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.

An optical filter is provided with a structure that contains a green coloring matter and a black coloring matter and satisfies the following requirements (i) and (ii). Further a device is provided with such an optical filter. (i) An average transmittance of light in the wavelength range of 400 to 730 nm is 2% or less. (ii) A continuous 50 nm wavelength range where an average transmittance is 80% or more exists in the wavelength range of 800 to 1000 nm.