489results about How to "Good chroma" patented technology

An inkjet ink of exceptional overall color characteristics having about 4% by weight Direct Yellow 132 in acid form, about 1% by weight Acid Yellow 17 in acid form in water, also having a humectant, a penetrant and other generally known additives. The ink having chroma of at least about 108.5.

Disclosed is a method for preparing a pearlescent pigment by coating metal oxides on the synthesized mica, involving the steps of grinding the synthesized mica by agitating the mica with water in a water mixer to a particle size between 100 and 500 μm and separating the mica, dispersing the separated particles of the synthesized mica in water and adding acid thereto to adjust pH between 1 and 4, adding the metal oxide precursors and a basic aqueous solution thereto while maintaining said pH range until the desired color is attained, and thereby forming at least one hydrous metal oxide layer on the particles of the synthesized mica, and filtering, water-washing, drying and calcining the synthesized mica coated with the metal oxide layer. The method may further involve the step of further pulverizing the synthesized mica roughly ground in a water mixer by using a conventional wet pulverizer so that less than 100 μm of the synthesized mica may be used as a base material. The suitable surfactants can be used in a water mixer as well as a conventional wet pulverizer. The pearlescent pigment prepared according to the present invention has excellent luster and chroma, since a coating layer of metal oxides is smooth and the dispersibility of the particles is excellent.

An object is to provide a carbazole derivative that is useful as a raw material in manufacturing a light emitting element material having resistance to repetition of an oxidation reaction. The carbazole derivative is represented by General Formula (1) in the following. In General Formula (1), R1 represents any one selected from an alkyl group having 1 to 4 carbon atoms such as methyl, ethyl, and tert-butyl, and an aryl group having 1 to 12 carbon atoms such as phenyl, biphenyl, and naphthyl.

In order to provide a recorded matter having image fastness to light and gas, disclosed is a recorded matter having an ink-receiving layer of a porous structure, wherein the ink-receiving layer has an image region where an image is formed with a coloring material, wherein the image region has a portion in which all or substantially all of the coloring material distributing in a thickness direction of the ink-receiving layer is embedded in a non-volatile liquid which does not dissolve the coloring material.