A window includes a base region and a compressive stress region disposed on the base region. The compressive stress region includes Li.sup.+, Na.sup.+, and K.sup.+ ions. The compressive stress region includes a first compressive stress portion in which a concentration of the K.sup.+ ions decreases, a concentration of Na.sup.+ ions increases, and a concentration of the Li.sup.+ ions increases, from a surface of the window toward the base region. A second compressive stress portion is adjacent to the first compressive stress portion. In the second compressive stress portion, the concentration of the Na.sup.+ ion decreases and the concentration of the Li.sup.+ ion increases, from the first compressive stress portion toward the base region. The window thereby has a high surface compressive stress value and impact resistance.

A window includes a base region and a compressive stress region disposed on the base region. The compressive stress region includes Li.sup.+, Na.sup.+, and K.sup.+ ions. The compressive stress region includes a first compressive stress portion in which a concentration of the K.sup.+ ions decreases, a concentration of Na.sup.+ ions increases, and a concentration of the Li.sup.+ ions increases, from a surface of the window toward the base region. A second compressive stress portion is adjacent to the first compressive stress portion. In the second compressive stress portion, the concentration of the Na.sup.+ ion decreases and the concentration of the Li.sup.+ ion increases, from the first compressive stress portion toward the base region. The window thereby has a high surface compressive stress value and impact resistance.

The present invention relates to a glass plate having two main surfaces, including 50 ppm to 2,500 ppm of Sb.sub.2O.sub.3 in ppm by mass in terms of oxides, in which when a transmittance in a thickness direction of the glass plate is defined as T (%) in percentage, a transmittance in the thickness direction after removing a surface layer of 10 m from each of the two main surfaces of the glass plate is defined as U (%) in percentage, and U-T at a wavelength of 380 nm is defined as (U-T).sub.380, the (U-T).sub.380 is 1.3% or more, and a haze is 2.0% or less.

The present invention relates to a glass plate having two main surfaces, including 50 ppm to 2,500 ppm of Sb.sub.2O.sub.3 in ppm by mass in terms of oxides, in which when a transmittance in a thickness direction of the glass plate is defined as T (%) in percentage, a transmittance in the thickness direction after removing a surface layer of 10 m from each of the two main surfaces of the glass plate is defined as U (%) in percentage, and U-T at a wavelength of 380 nm is defined as (U-T).sub.380, the (U-T).sub.380 is 1.3% or more, and a haze is 2.0% or less.

The invention relates to a glass pane, in particular a glass pane which is obtained by individualizing a floated glass strip formed by a hot forming process, in particular comprising a borosilicate glass, with a thickness (D) ranging from at least 1.75 mm to maximally 7 mm or a thickness (D) ranging from at least 0.7 mm to 7 mm, in particular from 1.1 mm to maximally 7 mm, and comprising an upper face and a lower face. The glass pane is characterized by a fine waviness of 10 nm to 26 nm, preferably between 10 nm and 15 nm, in at least one direction parallel to the surface of the glass pane on at least one surface of the upper face or the lower face of the glass pane. The invention also relates to an assembly of said glass panes and to methods for producing and using same.

The invention relates to a glass pane, in particular a glass pane which is obtained by individualizing a floated glass strip formed by a hot forming process, in particular comprising a borosilicate glass, with a thickness (D) ranging from at least 1.75 mm to maximally 7 mm or a thickness (D) ranging from at least 0.7 mm to 7 mm, in particular from 1.1 mm to maximally 7 mm, and comprising an upper face and a lower face. The glass pane is characterized by a fine waviness of 10 nm to 26 nm, preferably between 10 nm and 15 nm, in at least one direction parallel to the surface of the glass pane on at least one surface of the upper face or the lower face of the glass pane. The invention also relates to an assembly of said glass panes and to methods for producing and using same.