Abstract: Provided is a compound represented by Formula (1A) below wherein the symbols are as defined in the description: Also disclosed are a composition containing at least one of the compound and a formed article of the compound.

Abstract: Provided is an information recording object designed such that a read angle of embedded information is easily assessed. An information recording object, which comprises a combined image including an image C1 and an image C2 formed on the image C1, is configured so that the image C1 and the image C2 are different patterns generated according to specific rules and so that the reflected light quantities differ due to respective viewing angles, and the image C1 and/or the image C2 can be recognized in the combined image in accordance with the viewing angle, and the combined image has an angle-specifying area formed using a material having the same reflected light quantity as the image C2.

Abstract: The objective of the present invention is to provide an information recording body, a medium and a printed product having improved design properties. An information recording body provided with a superimposed image including a brilliant layer and a transparent layer formed on the brilliant layer is characterized in that: the brilliant layer is a chromatic color image formed from a brilliant material; the transparent layer is a regular pattern image formed from a transparent starting material; the transparent starting material is configured in such a way that an amount of light reflected therefrom differs depending on an observation angle; and the superimposed image is formed in such a way that the transparent layer is recognizable in accordance with a specific observation angle.

Abstract: The objective of the present invention is to provide an information recording body, a medium and a printed product having improved design properties. An information recording body provided with a superimposed image including a brilliant layer and a transparent layer formed on the brilliant layer is characterized in that: the brilliant layer is a chromatic color image formed from a brilliant material; the transparent layer is a regular pattern image formed from a transparent starting material; the transparent starting material is configured in such a way that an amount of light reflected therefrom differs depending on an observation angle; and the superimposed image is formed in such a way that the transparent layer is recognizable in accordance with a specific observation angle.

Abstract: Provided is an information recording object designed such that a read angle of embedded information is easily assessed. An information recording object, which comprises a combined image including an image C1 and an image C2 formed on the image C1, is configured so that the image C1 and the image C2 are different patterns generated according to specific rules and so that the reflected light quantities differ due to respective viewing angles, and the image C1 and/or the image C2 can be recognized in the combined image in accordance with the viewing angle, and the combined image has an angle-specifying area formed using a material having the same reflected light quantity as the image C2.

Abstract: There is provided a luminescent medium which requires difficult analysis of light emitted from a luminescent material of the medium. A luminescent medium includes a substrate, and a luminescent material comprising a first luminescent material which, when irradiated with visible light, infrared light or ultraviolet light, emits first infrared light “a”, and a second luminescent material which, when irradiated with visible light, infrared light or ultraviolet light, emits second infrared light “b”. The first luminescent material is formed in a first planar area, and the second luminescent material is formed in a second planar area. The first planar area and the second planar area overlap each other, forming an overlapping planar area in which the luminescent materials each have a concentration gradation.

Abstract: To provide a light-emitting medium whereby different light-emitting forms can be realized that can easily be discriminated using a normal blacklight, and to provide a forgery prevention medium and a method for determining authenticity of the light-emitting medium. A light-emitting medium provided with a substrate and a first light-emitting region and a second light-emitting region disposed on both sides of the substrate, the substrate comprising a selective transmission region for transmitting non-visible light in a first wavelength region and essentially not transmitting non-visible light in a second wavelength region different from the first wavelength region, and the first light-emitting region and the second light-emitting region emitting light when irradiated by non-visible light in the first wavelength region and also emitting light when irradiated by non-visible light in the second wavelength region.

Abstract: An ink composition comprising one or two or more kinds of rare-earth complexes containing trivalent rare-earth ions and at least one organic ligand selected from a ?-diketone ligand, a carboxylic acid ligand, a phosphine oxide ligand and a nitrogen-containing aromatic heterocyclic ligand, wherein at least one selected from the following group A and at least one selected from the following group B are contained as the trivalent rare-earth ions contained in the one or two or more kinds of rare-earth complexes: Group A: Eu3+, Sm3+, Pr3+ and Ho3+; and Group B: Tb3+, Er3+, Tm3+, Dy3+, Yb3+, Nd3+, Ce3+ and Gd3+.

Abstract: An ink composition comprising: a rare-earth complex containing one kind of trivalent rare-earth ion selected from the group consisting of Eu3+, Tb3+, Sm3+, Er3+, Pr3+, Ho3+, Tm3+ and Dy3+, and a specific phosphine oxide ligand coordinated to the rare-earth ion, and a light-emitting material different from the rare-earth complex, wherein an absolute value of a difference between a wavelength (?1) at which a light emission intensity of the rare-earth complex is maximum and a wavelength (?2) at which a light emission intensity of the light-emitting material is maximum, is 50 nm or more.

Abstract: To provide a light-emitting medium whereby different light-emitting forms can be realized that can easily be discriminated using a normal blacklight, and to provide a forgery prevention medium and a method for determining authenticity of the light-emitting medium. A light-emitting medium provided with a substrate and a first light-emitting region and a second light-emitting region disposed on both sides of the substrate, the substrate comprising a selective transmission region for transmitting non-visible light in a first wavelength region and essentially not transmitting non-visible light in a second wavelength region different from the first wavelength region, and the first light-emitting region and the second light-emitting region emitting light when irradiated by non-visible light in the first wavelength region and also emitting light when irradiated by non-visible light in the second wavelength region.

Abstract: Provided are an information recording object and a reading device devised so that embedded information is difficult to guess. The information recording object 30 provided with a combined image comprising an image C1 printed in a lustrous layer 31 and an image C2 formed on the image C1 and printed in a transparent layer 32 is characterized in that: the image C1 and the image C2 are each printed with an ink for which the amount of reflected light differs according to viewing angle; for the combined image, one image is visible depending on the viewing angle; the image C2 is an image in which there is a regularity in feature points in a spatial frequency domain F2; and the image C1 is an image in which the feature points in a spatial frequency domain F1 are disposed at positions that block said regularity.

Abstract: Provided are an information recording object and a reading device devised so that embedded information is difficult to guess. The information recording object 30 provided with a combined image comprising an image C1 printed in a lustrous layer 31 and an image C2 formed on the image C1 and printed in a transparent layer 32 is characterized in that: the image C1 and the image C2 are each printed with an ink for which the amount of reflected light differs according to viewing angle; for the combined image, one image is visible depending on the viewing angle; the image C2 is an image in which there is a regularity in feature points in a spatial frequency domain F2; and the image C1 is an image in which the feature points in a spatial frequency domain F1 are disposed at positions that block said regularity.

Abstract: There is provided a luminescent medium which requires difficult analysis of light emitted from a luminescent material of the medium. A luminescent medium 10 includes a substrate 11, and a luminescent material 12 comprising a first luminescent material 12A which, when irradiated with visible light, infrared light or ultraviolet light, emits first infrared light “a”, and a second luminescent material 12B which, when irradiated with visible light, infrared light or ultraviolet light, emits second infrared light “b”. The first luminescent material 12A is formed in a first planar area 11A, and the second luminescent material 12B is formed in a second planar area 11B. The first planar area 11A and the second planar area 11B overlap each other, forming an overlapping planar area 11C in which the luminescent materials 12A and 12B each have a concentration gradation.

Abstract: The invention provides a solid polymer electrolyte having high performances in which the reaction area of electrode is increased by uniformly dispersing and bonding a solid polymer electrolyte and a catalyst and the ability of gas feeding to the reaction site is improved by adding a fluoropolymer so that the catalyst is not excessively coated. A method for making the fuel cell is also provided. The electrode provided on at least one side of a solid polymer electrolyte membrane is formed by coating on one side of a gas-diffusible layer a mixed dispersion of a noble metal catalyst, a carbon fine powder and a colloidal dispersion of a solid polymer electrolyte, the colloidal dispersion being prepared using an organic solvent having a polar group other than hydroxyl group in the molecule and having a carbon chain of 1-8 carbon atoms which bonds to the polar group or having a dielectric constant of 3-10.