Abstract: The claimed invention relates to a luminescent decorative material, which is visible even at night, of which different decorative properties are obtained in the daytime or under lighting due to the presence or absence of luminescence. The claimed invention provide a luminescent sheet (plane sheet) having see-through property and containing a transparent part, through which it is possible to see the area behind the plane sheet, and a luminescent part.

Abstract: This invention relates to a luminescent sheet obtained by allowing a sheet capable of causing luminescence to be subjected to perforation processing; and a method of producing the luminescent sheet, wherein the luminescent sheet is subjected to perforation processing involving drilling, heated needle, punching, flat die cutting, rotary die cutting, laser processing, or the like. According to the present invention, a low-power-consuming luminescent sheet obtained in a more convenient manner is provided.

Abstract: This invention relates to a luminescent sheet having see-through property, through which see-through holes are formed and which comprises a means of causing luminescence; a method of producing the luminescent sheet, comprising carrying out perforation processing on a sheet body comprising a means of causing luminescence so as to impart see-through property to such sheet body; and a method of producing the luminescent sheet, comprising carrying out perforation processing on a sheet body so as to impart see-through property to such sheet body and then applying a means of causing luminescence to the sheet body. According to this invention, a luminescent decorative material having see-through property, which is visible even at night and of which different decorative properties are visible in the daytime or under lighting due to the presence or absence of luminescence, is provided.

Abstract: According to this invention, a luminescent decorative material, which is visible even at night, of which different decorative properties are obtained in the daytime or under lighting due to the presence or absence of luminescence is provided. A luminescent sheet (plane sheet) having see-through property and comprising a transparent part, through which it is possible to see the area behind the plane sheet, and a luminescent part is provided.

Abstract: There are disclosed a protective film for optical disks which comprises a light transmittable substrate film and a pressure sensitive adhesive layer formed on one side thereof, wherein the difference in refractive index between the light transmittable substrate film and the pressure sensitive adhesive layer is at most 0.08 and a gel fraction of the pressure sensitive adhesive layer is at least 65% by mass; and an optical disk in which the protective film is stuck onto an information recording layer via the pressure sensitive adhesive layer. The protective film for optical disks is used for the purpose of protecting the information recording layer for optical disks, particularly Blu-ray Discs, and is characterized in that it never exerts adverse influence on the recording characteristics of optical disks and besides, is capable of suppressing the corrosion of the metallic reflection film and information recording layer for optical disks.

Abstract: A magneto-optical recording medium comprising a transparent substrate, a first dielectric layer on the substrate, a magneto-optical recording layer on the first dielectric layer and a metal reflecting layer on the magneto-optical recording layer, optically with a second dielecric layer between the magneto-optical recording layer, wherein the magneto-optical recording layer has a Curie temperature Tc of from 100.degree. C. to 200.degree. C. and a layer thickness of from 15 nm to 60 nm, the metal reflecting layer has a layer thickness of not less than 60 nm and a product .lambda.d of a thermal conductivity .lambda. by the layer thickness d of from 2.5 .mu.W/K to 20 .mu.W/K, and the following formula is satisfied: Tc.ltoreq.-10.times..lambda.d+300. This magneto-optical recording medium has an improved stability under repeated recording and erasing, or continuous erasing, operations without a loss of a high recording sensitivity thereof.

Abstract: A magneto-optical recording medium in which direct overwriting can be done by only modifying the power level and/or the pulse width of applied optical pulses, and without changing the direction of the bias magnetic field. The recording layer comprises first and second magnetic recording layers. The first magnetic layer is a rare-earth transition metal-amorphous alloy and has a perpendicular easy magnetization axis, a thickness of 10 to 200 nm, and a compensation temperature above room temperature. The second magnetic layer comprises an alloy of a first component of Co and/or Fe and a second component of a rare earth metal and/or a noble metal or an alloy of Co and at least one metal selected from Ti, Cr, Mn, Cu, Zn, Ga and Ge. The second magnetic layer is a material having an in-plane easy magnetization axis such that it has a magnetization axis parallel to the second magnetic layer if formed independently on a dielectric layer, the second magnetic layer having a thickness of not more than 3 nm.

Abstract: A magneto-optical recording medium having an improved durability or reliability is obtained by providing a protecting layer of an alloy of titanium with one or more of chromium, rhenium and tantalum. This titanium alloy protecting layer has an improved resistance to oxygen, water, chlorine, and acids, etc. and provides an improved resistance to the environment and attacks from the synthetic resin substrate or other layers constituting the medium, such as a dielectric layer and a reflecting layer.

Abstract: The reproduction characteristics, particularly the C/N ratio of a reproduced signal of an optical recording medium are deteriorated by an unevenness or deformation of an optical recording layer due to a convex or concave configuration of underlying guide means that are formed on the surface of the substrate. This deterioration can be prevented by disposing a leveling layer under the recording layer, but the leveling layer lowers the efficiency of the servo tracking. This lowering of servo tracking efficiency is prevented by insertion of a dielectric layer between the leveling layer and the guides.

Abstract: In the magneto-optical recording medium with a transparent substrate, a film of dielectric indium oxide, tin oxide or metallic Ti is interposed between the substrate and the recording layer, to prevent deterioration of the properties thereof.

Abstract: A magneto-optical recording medium having an improved durability or reliability is obtained by providing a protecting layer of an alloy of titanium with one or more of chromium, rhenium and tantalum. This titanium alloy protecting layer has an improved resistance to oxygen, water, chlorine, and acids, etc. and provides an improved resistance to the environment and attacks from the synthetic resin substrate or other layers constituting the medium, such as a dielectric layer and a reflecting layer.

Abstract: An optical recording medium comprising a transparent dielectric layer as a protecting and/or enhancing layer is provided, wherein the transparent dielectric layer is made of an oxide of at least one metal selected from the group consisting of indium, tin and tantalum, the oxide further containing at least one element selected from the group of nitrogen and bismuth. This transparent dieletric layer has an excellent adhesivity to a resin substrate, a low internal stress, and a high refractive index.