Abstract: A cover glass includes a glass substrate and an antireflection film disposed on at least one of main surfaces of the glass substrate, and the at least one of main surfaces of the glass substrate has one or more cracks formed therein, the crack(s) each having a length of 5 ?m or less, and a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film has been disposed and a difference ?b* in b* value between any two points within the surface of the cover glass on the side where the antireflection film has been disposed satisfy the following expression: ?{(?a*)2+(?b*)2}?4.

Abstract: A cover glass includes: a glass substrate having a convex and concave shape formed on at least one of surfaces thereof by an antiglare treatment; and an antireflection film disposed on the surface of the glass substrate, the surface having the convex and concave shape. In the cover glass, a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film is present and a difference ?b* in b*value between any two points within the surface of the cover glass on the side where the antireflection film is present satisfy the following expression: ?{(?a*)2+(?b*)2}?4.

Abstract: The present invention relates to a plate with a printing layer containing a plate having a first main surface, a second main surface and an edge face, and a printing layer provided on a periphery of the first main surface, in which the plate has an outer circumferential part corresponding to an outer circumferential part of the printing layer and an inner circumferential part corresponding to an inner circumferential part of the printing layer, in which the outer circumferential part of the plate has, in at least a part of the whole circumference, an outer circumferential region, and the inner circumferential part of the plate contains an inner circumferential region corresponding to the outer circumferential region, and in which the outer circumferential region has a surface roughness R2 and the inner circumferential region has a surface roughness R1, and R2>R1 is satisfied.

Abstract: The present invention relates to a plate with a printing layer containing a plate having a first main surface, a second main surface and an edge face, and a printing layer provided on a periphery of the first main surface, in which the plate has an outer circumferential part corresponding to an outer circumferential part of the printing layer and an inner circumferential part corresponding to an inner circumferential part of the printing layer, in which the outer circumferential part of the plate has, in at least a part of the whole circumference, an outer circumferential region, and the inner circumferential part of the plate contains an inner circumferential region corresponding to the outer circumferential region, and in which the outer circumferential region has a surface roughness R2 and the inner circumferential region has a surface roughness R1, and R2>R1 is satisfied.

Abstract: The present invention relates to a plate with a printing layer containing a plate having a first main surface, a second main surface and an edge face, and a printing layer provided on a periphery of the first main surface, in which the plate has an outer circumferential part corresponding to an outer circumferential part of the printing layer and an inner circumferential part corresponding to an inner circumferential part of the printing layer, in which the outer circumferential part of the plate has, in at least a part of the whole circumference, an outer circumferential region, and the inner circumferential part of the plate contains an inner circumferential region corresponding to the outer circumferential region, and in which the outer circumferential region has a surface roughness R2 and the inner circumferential region has a surface roughness R1, and R2>R1 is satisfied.

Abstract: The present invention relates to a plate with a printing layer containing a plate having a first main surface, a second main surface and an edge face, and a printing layer provided on a periphery of the first main surface, in which the plate has an outer circumferential part corresponding to an outer circumferential part of the printing layer and an inner circumferential part corresponding to an inner circumferential part of the printing layer, in which the outer circumferential part of the plate has, in at least a part of the whole circumference, an outer circumferential region, and the inner circumferential part of the plate contains an inner circumferential region corresponding to the outer circumferential region, and in which the outer circumferential region has a surface roughness R2 and the inner circumferential region has a surface roughness R1, and R2>R1 is satisfied.

Abstract: A cover glass includes a glass substrate and an antireflection film disposed on at least one of main surfaces of the glass substrate, and the at least one of main surfaces of the glass substrate has one or more cracks formed therein, the crack(s) each having a length of 5 ?m or less, and a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film has been disposed and a difference ?b* in b* value between any two points within the surface of the cover glass on the side where the antireflection film has been disposed satisfy the following expression: ?{(?a*)2+(?b*)2}?4.

Abstract: The present invention relates to a plate with a printing layer containing a plate having a first main surface, a second main surface and an edge face, and a printing layer provided on a periphery of the first main surface, in which the plate has an outer circumferential part corresponding to an outer circumferential part of the printing layer and an inner circumferential part corresponding to an inner circumferential part of the printing layer, in which the outer circumferential part of the plate has, in at least a part of the whole circumference, an outer circumferential region, and the inner circumferential part of the plate contains an inner circumferential region corresponding to the outer circumferential region, and in which the outer circumferential region has a surface roughness R2 and the inner circumferential region has a surface roughness R1, and R2>R1 is satisfied.

Abstract: A cover glass includes: a glass substrate having a convex and concave shape formed on at least one of surfaces thereof by an antiglare treatment; and an antireflection film disposed on the surface of the glass substrate, the surface having the convex and concave shape. In the cover glass, a difference ?a* in a* value between any two points within a surface of the cover glass on the side where the antireflection film is present and a difference ?b* in b* value between any two points within the surface of the cover glass on the side where the antireflection film is present satisfy the following expression: ?{(?a*)2+(?b*)2}?4.

Abstract: A method for aging an organic electroluminescence display element where the integration value with respect to an applied voltage and a voltage application time in a reverse direction is at least twice as much as in a forward direction.

Abstract: A method for producing an organic EL display element is presented to improve the emission luminance lifetime and to stabilize emission characteristics.