Abstract: An eraser includes: a base material including a plasticizer and at least one of a resin component or an elastomer component; and a porous foam made of a resin and impregnated with the resin base material, and the plasticizer has an SP value of 8.3 or more and 10 or less.

Abstract: This invention provides a plasma treatment detection indicator that uses a fibrous base material or a synthetic resin base material comprising a coloring pigment as a base material and in which fine fiber pieces or coloring pigment is prevented from being generated in a powder form from the base material in plasma treatment. More specifically, this invention provides a plasma treatment detection indicator comprising a base material and at least a color-changing layer that changes color in a plasma treatment atmosphere, the color-changing layer being disposed above part or all of a surface of the base material, (1) the base material being a fibrous base material or a synthetic resin base material comprising a coloring pigment, and (2) a resin-based or inorganic transparent cover layer that covers all of the surface of the base material being disposed between the base material and the color-changing layer.

Abstract: Provided is a plasma treatment detection indicator that enables the completion of plasma treatment to be confirmed from the color change of a color-changing layer by controlling the color change rate, regardless of whether the type of plasma is reduced-pressure plasma or atmospheric-pressure plasma, and regardless of the degree of plasma intensity; also provided is an ink composition for detecting plasma treatment for forming the color-changing layer. The ink composition for detecting plasma treatment comprises an organic dye and at least one member selected from the group consisting of a photopolymerization initiator, silica, and hydrophobic alumina.

Abstract: A primary object of the present invention is to provide a hydrogen peroxide gas detection indicator which allows more certain visual recognition of color changing according to the concentration of hydrogen peroxide gas. The structure of this invention relates to an ink composition for detecting hydrogen peroxide gas containing (1) at least one of styrene acrylic resins and styrene-maleic acid resins and (2) a methine dye. According to this invention, a color-changing layer is formed using the ink composition for detecting hydrogen peroxide gas, allowing color changing according to the concentration of hydrogen peroxide gas to be visually recognized.

Abstract: An object of the present invention is to provide: a plasma treatment detection indicator comprising a color-changing layer that exhibits improved heat resistance so that the layer does not change color even when overheated at up to about 170° C. as a result of a plasma-generating gas not being supplied or being insufficient due to a defect in a plasma treatment device; and an ink composition for detecting plasma treatment, the composition being for forming the color-changing layer. The ink composition for detecting plasma treatment includes a colorant and a binder resin containing a phenol resin, and the plasma treatment detection indicator uses the ink composition.

Abstract: The present invention provides a plasma treatment detection indicator including a color-changing layer that changes color by plasma treatment, exhibiting excellent heat resistance, with the gasification of the color-changing layer or the scattering of the fine debris of the color-changing layer caused by the plasma treatment being suppressed to such a degree as to not affect the electronic device properties. Specifically, the present invention provides a plasma treatment detection indicator including a color-changing layer that changes color by plasma treatment, the color-changing layer containing at least one metal element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi in the form of a simple substance and/or an inorganic compound containing at least one metal element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi.

Abstract: The present invention provides an ink composition for forming a color-changing layer that changes color by plasma treatment, the ink composition exhibiting excellent heat resistance, with the gasification of the color-changing layer or the scattering of the fine debris of the color-changing layer caused by plasma treatment being suppressed to the extent that electronic device properties are not affected. The invention provides an ink composition for forming a color-changing layer that changes color by plasma treatment, the ink composition comprising metal oxide particles containing at least one element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi, and a binder resin.

Abstract: Provided is an indicator that can easily detect whether treatment with at least one member of plasma, ozone, ultraviolet rays, and radical-containing gas is uniformly performed on an entire substrate in an electronic device manufacturing apparatus; also provided is a method for designing and/or managing an electronic device manufacturing apparatus using the indicator. The indicator is used in an electronic device manufacturing apparatus, wherein (1) the indicator detects at least one member selected from the group consisting of plasma, ozone, ultraviolet rays, and radical-containing gas, (2) the indicator has a shape that is the same as that of a substrate used in the electronic device manufacturing apparatus, (3) the indicator contains a color-changing layer, and (4) the color-changing layer is formed by an ink composition whose color changes or disappears by reaction with at least one member selected from the group consisting of plasma, ozone, ultraviolet rays, and radical-containing gas.

Abstract: Provided is an indicator that can easily detect whether treatment with at least one member of plasma, ozone, ultraviolet rays, and radical-containing gas is uniformly performed on an entire substrate in an electronic device manufacturing apparatus; also provided is a method for designing and/or managing an electronic device manufacturing apparatus using the indicator. The indicator is used in an electronic device manufacturing apparatus, wherein (1) the indicator detects at least one member selected from the group consisting of plasma, ozone, ultraviolet rays, and radical-containing gas, (2) the indicator has a shape that is the same as that of a substrate used in the electronic device manufacturing apparatus, (3) the indicator contains a color-changing layer, and (4) the color-changing layer is formed by an ink composition whose color changes or disappears by reaction with at least one member selected from the group consisting of plasma, ozone, ultraviolet rays, and radical-containing gas.

Abstract: Provided is an indicator that can easily detect whether treatment with at least one member of plasma, ozone, ultraviolet rays, and radical-containing gas is uniformly performed on an entire substrate in an electronic device manufacturing apparatus; also provided is a method for designing and/or managing an electronic device manufacturing apparatus using the indicator. The indicator is used in an electronic device manufacturing apparatus, wherein (1) the indicator detects at least one member selected from the group consisting of plasma, ozone, ultraviolet rays, and radical-containing gas, (2) the indicator has a shape that is the same as that of a substrate used in the electronic device manufacturing apparatus, (3) the indicator contains a color-changing layer, and (4) the color-changing layer is formed by an ink composition whose color changes or disappears by reaction with at least one member selected from the group consisting of plasma, ozone, ultraviolet rays, and radical-containing gas.

Abstract: The present invention provides a plasma treatment detection indicator including a color-changing layer that changes color by plasma treatment, exhibiting excellent heat resistance, with the gasification of the color-changing layer or the scattering of the fine debris of the color-changing layer caused by the plasma treatment being suppressed to the extent that electronic device properties are not affected. Specifically, the present invention provides a plasma treatment detection indicator comprising a color-changing layer that changes color by plasma treatment, the color-changing layer comprising metal oxide fine particles containing at least one element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi, the metal oxide fine particles having a mean particle size of 50 ?m or less.

Abstract: The present invention provides an ink composition for forming a color-changing layer that changes color by plasma treatment, the ink composition exhibiting excellent heat resistance, with the gasification of the color-changing layer or the scattering of the fine debris of the color-changing layer caused by plasma treatment being suppressed to the extent that electronic device properties are not affected. The invention provides an ink composition for forming a color-changing layer that changes color by plasma treatment, the ink composition comprising metal oxide particles containing at least one element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi, and a binder resin.

Abstract: An oil-based pigment ink composition contains titanium dioxide pigment, mica pigment, dispersant, oil-soluble resin, and organic solvent, whose viscosity at a shear velocity of 76 (l/s) is 50 mPa-s or lower. The ink composition produces writing with sufficient covering property and legibility, does not form hard cakes, and can release ink in a stable manner from the tip of a writing tool.

Abstract: The present invention provides a plasma treatment detection indicator including a color-changing layer that changes color by plasma treatment, exhibiting excellent heat resistance, with the gasification of the color-changing layer or the scattering of the fine debris of the color-changing layer caused by the plasma treatment being suppressed to such a degree as to not affect the electronic device properties. Specifically, the present invention provides a plasma treatment detection indicator including a color-changing layer that changes color by plasma treatment, the color-changing layer containing at least one metal element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi in the form of a simple substance and/or an inorganic compound containing at least one metal element selected from the group consisting of Mo, W, Sn, V, Ce, Te, and Bi.

Abstract: Provided is a plasma treatment detection indicator that enables the completion of plasma treatment to be confirmed from the color change of a color-changing layer by controlling the color change rate, regardless of whether the type of plasma is reduced-pressure plasma or atmospheric-pressure plasma, and regardless of the degree of plasma intensity; also provided is an ink composition for detecting plasma treatment for forming the color-changing layer. The ink composition for detecting plasma treatment comprises an organic dye and at least one member selected from the group consisting of a photopolymerization initiator, silica, and hydrophobic alumina.

Abstract: An object of the present invention is to provide: a plasma treatment detection indicator comprising a color-changing layer that exhibits improved heat resistance so that the layer does not change color even when overheated at up to about 170° C. as a result of a plasma-generating gas not being supplied or being insufficient due to a defect in a plasma treatment device; and an ink composition for detecting plasma treatment, the composition being for forming the color-changing layer. The ink composition for detecting plasma treatment includes a colorant and a binder resin containing a phenol resin, and the plasma treatment detection indicator uses the ink composition.

Abstract: The present invention provides uniformly electrified electret fine particles having excellent electrophoretic properties. Specifically, the present invention provides a core-shell electret fine particle comprising a core part and a shell part, the core part containing a material that has an ability to disperse a pigment therein, the shell part containing an electret resin, and the electret resin being a fluorine-containing resin and being electretized by electron ray irradiation, radial ray irradiation, or corona discharge treatment.

Abstract: This invention provides a plasma treatment detection indicator that uses a fibrous base material or a synthetic resin base material comprising a coloring pigment as a base material and in which fine fiber pieces or coloring pigment is prevented from being generated in a powder form from the base material in plasma treatment. More specifically, this invention provides a plasma treatment detection indicator comprising a base material and at least a color-changing layer that changes color in a plasma treatment atmosphere, the color-changing layer being disposed above part or all of a surface of the base material, (1) the base material being a fibrous base material or a synthetic resin base material comprising a coloring pigment, and (2) a resin-based or inorganic transparent cover layer that covers all of the surface of the base material being disposed between the base material and the color-changing layer.

Abstract: A water-based ink composition for glass and ceramic surfaces contains an acrylic silicone resin emulsion, pigment, dispersant, and water-based solvent. The water-based ink composition may further contain a thixotropic agent and/or resin beads. The ink composition allows writing made with it to sufficiently demonstrate excellent water resistance, hot water resistance, and scratch resistance even on glass and ceramic surfaces, and to remain sufficiently legible even after the glass products or ceramics are cleaned repeatedly.