A thin glass substrate, as well as a method and an apparatus are provided. The glass substrate has a glass having first and second main surfaces and elongated elevations on one of the main surfaces. The elevations rise in a normal direction, have a longitudinal extent that is greater than two times a transverse extent, and have a height, on average, that is less than 100 nm, and with a transverse extent of the elevation smaller than 40 mm. The method includes melting a glass, hot forming the glass, and adjusting a viscosity of the glass so that for the viscosity η1 for a first stretch over a first distance of up to 1.5 m downstream of a flow rate control component and y1 indicating a second distance to a location immediately downstream the flow rate control component the equation lg η1(y1)/dPa.Math.s=(lg η01/dPa.Math.s+a1(y1)) applies.

According to one or more embodiments described herein, an apparatus may hold and retain glass articles during processing. The apparatus may comprise a base frame comprising a bottom support plate and a plurality of ware keepers positioned on the bottom support plate. Each ware keeper of the plurality of ware keepers may comprise a plurality of retention bodies formed from wire segments and defining a ware receiving volume therebetween. Each retention body may comprise one or more of a base connection stem, a seat segment, a body segment, a retention segment, and a lever segment. The seat segments of the retention bodies may form a ware seat positioned above and substantially parallel to the bottom support plate. According to another embodiment, an assembly may comprise a plurality of magazine apparatus.

The present invention relates to a chemically strengthened glass having a sheet shape, in which a haze in terms of a thickness of 0.70 mm is 1.0% or less, and on at least one main surface of the glass, a ratio (Rku/Hv)×1000 of kurtosis Rku of surface unevenness to Vickers hardness Hv is 1 or more and 4.4 or less.

The present invention relates to a chemically strengthened glass having a haze value in terms of a thickness of 0.7 mm of 0.5% or less, having a surface compressive stress value of 400 MPa or more, having a depth of a compressive stress layer of 70 μm or more, having an ST limit of 18000 MPa.Math.μm to 30000 MPa.Math.μm, and being a glass ceramic including at least one of a Li.sub.3PO.sub.4 crystal and a Li.sub.4SiO.sub.4 crystal, or including a solid solution crystal of Li.sub.3PO.sub.4 or Li.sub.4SiO.sub.4 or a solid solution of both Li.sub.3PO.sub.4 and Li.sub.4SiO.sub.4.

Methods of manufacturing a glass-based article include exposing a glass-based substrate to a molten salt bath including a first salt and a second salt. In aspects, the first salt includes a metal ion that has a larger ionic radii than an alkali metal of the glass-based substrate and a first anion, and the second salt dissolved in the molten salt bath includes the same metal ion as the first salt and a second anion different from the first anion. In aspects, the first salt is potassium nitrate, the second salt is potassium carbonate, and a concentration of the potassium carbonate remains at or below its solubility limit in the molten salt bath.

Chemically strengthened glass articles exhibiting superior resistance to damage when dropped onto an abrasive surface. The strengthened glass article has a stress profile in which the compressive and tensile stresses within the article vary as a function of the thickness t of the glass article. The stress profile has a first region extending from the surface of the glass article to a depth d1 into the glass, wherein d1≦0.025t or ≦20 μm and has a maximum compressive stress of at least about 280 MPa at the surface, a second region extending from a depth of at least d1 to a second depth d2 and having a local compressive stress maximum, and a third region extending from a third depth d3 in the glass to a depth of compression DOC, wherein d2≦d3 and DOC≦0.15t. A method of strengthening a glass article to provide resistance to damage when dropped is also provided.

Multicolored glass-based articles and methods of manufacture are disclosed. The method includes forming a glass-based part and exposing a first region to radiation and a second region to radiation such that the first and second regions have different sized metallic nanoparticles, resulting in a multicolored glass article.

A glass article includes a first surface, a second surface opposed to the first surface, a first compressive region extending from the first surface to a first compression depth, a second compressive region extending from the second surface to a second compression depth and a tensile region between the first compression depth and the second compression depth. A stress profile of the first compressive region includes a first segment located between the first surface and a first transition point and a second segment located between the first transition point and the first compression depth. A depth from the first surface to the first transition point ranges from 6.1 μm to 8.1 μm. A compressive stress at the first transition point ranges from 207 MPa to 254 MPa. A stress-depth ratio of the first transition point ranges from 28 MPa/μm to 35 MPa/μm.

A glass article includes a central layer including a first crystalline phase having a first coefficient of thermal expansion and a surface layer surrounding an entirety of the central layer and including a second crystalline phase having a second coefficient of thermal expansion smaller than the first coefficient of thermal expansion. Accordingly, the strength of the glass article may be improved.

Methods are provided for measuring the asymmetry of glass-sheet manufacturing processes. The methods include subjecting glass sheets or test samples taken from glass sheets to an ion-exchange process and measuring warp values. Metrics for the asymmetry of the glass-sheet manufacturing process are then obtained from the warp values. In one embodiment, the metric is independent of the geometry of the glass sheets or the test samples (the BM.sub.1 metric); in another embodiment, the metric is independent of the geometry of the glass sheets or the test samples and substantially independent of the ion-exchange process used in the testing (the ASYM metric).