Disclosed herein is an antiglare glass sheet article for display devices in which at least one main surface of the glass sheet is roughened. The article has a roughened surface that includes: a surface with continuous irregularities having an arithmetic average roughness (Ra) of 0.01 to 0.1 μm, and an average interval (RSm) of 1 to 20 μm; and depressions dispersed over the surface and each having a circular entrance portion measuring 3 to 20 μm in diameter, and a depth of 0.2 to 1.5 μm from the entrance portion, the roughened surface having 60 to 600 of the depressions in an observed 250 μm ×250 μm region. The article has desirable antiglare properties with reduced sparkling.

The purpose of the present invention is to provide a chemically-strengthened glass exhibiting both surface strength and abrasion-resistant anti-fingerprint (AFP) properties. The present invention relates to a plate-shaped chemically-strengthened glass which has a compressive stress layer provided to a glass surface layer, a glass surface hydrogen concentration profile in a specific range, and a surface strength and abrasion-resistant anti-fingerprint (AFP) properties which are in specific ranges.

A synthetic quartz glass substrate is prepared by immersing a starting substrate in an aqueous solution of a nonionic surfactant and precision polishing the substrate with a colloidal silica water dispersion. A synthetic quartz glass substrate having a few defects and low surface roughness is obtained while the polishing rate is improved and the polishing time is reduced.

A glass includes a first surface; a second surface that faces the first surface; at least one first end surface arranged between the first surface and the second surface; and at least one first chamfering surface connecting the first surface or the second surface with the first end surface. A surface roughness Ra of the first chamfering surface is 0.4 μm or less.

The present invention relates to a chemically strengthened glass including alkali metal ions, having a thickness of 0.20 mm or smaller, and having a pair of major surfaces that are opposed to each other and have been subjected to a chemically strengthening treatment, in which at least one of the pair of major surfaces has a core roughness depth Sk of 0.90 nm or smaller and a mean summit curvature Ssc of 13.0×10.sup.−4/nm or smaller.

A glass member includes a recessed portion, wherein in cross-sectional view, an angle formed between a principal surface of the glass member and an edge face of an opening of the recessed portion is 90 degrees to 130 degrees.

The present disclosure includes a method of making an article including etching a surface of a substrate with an etching suspension comprising an etching cream and glycerin, such that the surface is an anti-glare surface and the article comprises a sparkle of no more than 1%. An article made by the method can include a substrate having a textured surface and comprises a sparkle of no more than 1%.

A textured glass article that includes: a glass substrate comprising a thickness, a primary surface and a bulk composition at the midpoint of the thickness; and a textured region defined by the primary surface and comprising a textured region composition. The textured region comprises a sparkle of 2% or less. Further, the bulk composition comprises about 40 mol % to 80 mol % silica and the textured region composition comprises at least about 40 mol % silica.

A production process of a polishing stone includes a glass sphere feeding step of feeding glass spheres into a mold, and a firing step of heating the mold with the glass spheres filled therein at a temperature higher than a softening point and lower than a melting point of the glass spheres, thereby forming a glass block as the polishing stone. In the firing step, the heating is stopped with air bubbles still dispersed and remaining in interstices between the glass spheres in a dispersed manner.

The present invention provides a cover glass that can be installed in an automobile so as to cover a display unit including a plurality of information areas, including a glass body that has a first surface facing the display unit side, and a second surface opposite to the first surface, and that includes a plurality of transmission areas respectively corresponding to the information areas.