Embodiments of the present invention provide a method for finishing a glass product including a glass layer, the glass layer comprising boron. The method includes the step of cleaning the glass layer in order to remove boron at least at the surface of the glass layer. The step of cleaning includes the substep of esterification using a medium comprising an alcohol.

A roller train and a substrate conveying device are provided. The roller train is used for a substrate and includes a first roller including a first delimitation part, and a second roller including a second delimitation part. An axial line of the first roller is parallel to that of the second roller; the first roller and the second roller contact an upper surface and a lower surface of the substrate, respectively; and, the first delimitation part and the second delimitation part are arranged on the first axis and the second axis, respectively, and configured to delimit axial displacement of the first roller and the second roller, respectively. The first delimitation part and the second delimitation part cooperate to prevent misalignment between the first roller and the second roller.

To provide chemically tempered glass which is less likely to break even if scratched. Chemically tempered glass, which comprises, as represented by mole percentage based on the following oxides, from 56 to 72% of SiO.sub.2, from 8 to 20% of Al.sub.2O.sub.3, from 9 to 25% of Na.sub.2O, from 0 to 2% of K.sub.2O, and from 0 to 15% of MgO, and which has a surface compressive stress of at least 900 MPa and an internal tensile stress of at most 30 MPa. Glass for chemical tempering, which comprises, as represented by mole percentage based on the following oxides, from 56 to 69% of SiO.sub.2, from 8 to 16% of Al.sub.2O.sub.3, from 9 to 22% of Na.sub.2O, from 0 to 1% of K.sub.2O, from 5.5 to 14% of MgO, from 0 to 2% of ZrO.sub.2, and from 0 to 6% of B.sub.2O.sub.3.

To provide chemically tempered glass which is less likely to break even if scratched. Chemically tempered glass, which comprises, as represented by mole percentage based on the following oxides, from 56 to 72% of SiO.sub.2, from 8 to 20% of Al.sub.2O.sub.3, from 9 to 25% of Na.sub.2O, from 0 to 2% of K.sub.2O, and from 0 to 15% of MgO, and which has a surface compressive stress of at least 900 MPa and an internal tensile stress of at most 30 MPa. Glass for chemical tempering, which comprises, as represented by mole percentage based on the following oxides, from 56 to 69% of SiO.sub.2, from 8 to 16% of Al.sub.2O.sub.3, from 9 to 22% of Na.sub.2O, from 0 to 1% of K.sub.2O, from 5.5 to 14% of MgO, from 0 to 2% of ZrO.sub.2, and from 0 to 6% of B.sub.2O.sub.3.

Embodiments disclosed therein generally pertain to selectively strengthening glass. More particularly, techniques are described for selectively strengthening cover glass, which tends to be thin, for electronic devices, namely, portable electronic devices.

Embodiments disclosed therein generally pertain to selectively strengthening glass. More particularly, techniques are described for selectively strengthening cover glass, which tends to be thin, for electronic devices, namely, portable electronic devices.

To provide chemically tempered glass which is less likely to break even if scratched. Chemically tempered glass, which comprises, as represented by mole percentage based on the following oxides, from 56 to 72% of SiO.sub.2, from 8 to 20% of Al.sub.2O.sub.3, from 9 to 25% of Na.sub.2O, from 0 to 2% of K.sub.2O, and from 0 to 15% of MgO, and which has a surface compressive stress of at least 900 MPa and an internal tensile stress of at most 30 MPa. Glass for chemical tempering, which comprises, as represented by mole percentage based on the following oxides, from 56 to 69% of SiO.sub.2, from 8 to 16% of Al.sub.2O.sub.3, from 9 to 22% of Na.sub.2O, from 0 to 1% of K.sub.2O, from 5.5 to 14% of MgO, from 0 to 2% of ZrO.sub.2, and from 0 to 6% of B.sub.2O.sub.3.

Disclosed herein are methods for making asymmetric laminate structures and methods for reducing bow in asymmetric laminate structures, the methods comprising differentially heating the laminate structures during lamination or differentially cooling the laminate structures after lamination. Also disclosed herein are methods for reducing bow in asymmetric laminate structures, the methods comprising subjecting at least one substrate in the laminate structure to asymmetric tempering or annealing prior to lamination. Further disclosed herein are laminate structures made according to such methods.

To provide chemically tempered glass which is less likely to break even if scratched. Chemically tempered glass, which comprises, as represented by mole percentage based on the following oxides, from 56 to 72% of SiO.sub.2, from 8 to 20% of Al.sub.2O.sub.3, from 9 to 25% of Na.sub.2O, from 0 to 2% of K.sub.2O, and from 0 to 15% of MgO, and which has a surface compressive stress of at least 900 MPa and an internal tensile stress of at most 30 MPa. Glass for chemical tempering, which comprises, as represented by mole percentage based on the following oxides, from 56 to 69% of SiO.sub.2, from 8 to 16% of Al.sub.2O.sub.3, from 9 to 22% of Na.sub.2O, from 0 to 1% of K.sub.2O, from 5.5 to 14% of MgO, from 0 to 2% of ZrO.sub.2, and from 0 to 6% of B.sub.2O.sub.3.

A transparent laminate is provided that includes at least one chemically prestressed pane having a thickness, a compressive stress (CS) of a surface layer, a thickness of the prestressed surface layer and a tensile stress (CT) of an interior portion. The tensile stress (CT) is greater than 0 and is less than the compressive stress divided by 50.