Abstract: The invention relates to a pane that has undergone a chemical toughening operation so as to have an alkali-metal-ion concentration gradient from its surface over an exchange depth of at least 100 ?m, a surface stress of at least 200 MPa, and a strain point at the core of at least 550° C. The pane can be used especially in the field of domestic cooking, as a pyrolytic oven door, stove, fire guard, flue insert, and more generally for separating two gaseous atmospheres at different temperatures. The pane is particularly resistant to heat shocks.

Abstract: The invention relates to a pane that has undergone a chemical toughening operation so as to have an alkali-metal-ion concentration gradient from its surface over an exchange depth of at least 100 ?m, a surface stress of at least 200 MPa, and a strain point at the core of at least 550° C. The pane can be used especially in the field of domestic cooking, as a pyrolytic oven door, stove, fire guard, flue insert, and more generally for separating two gaseous atmospheres at different temperatures. The pane is particularly resistant to heat shocks.

Abstract: Diffusing structure (20) that absorbs in the ultraviolet, comprising a glass substrate (21) and a diffusing layer (22), the diffusing layer comprising scattering particles dispersed in a binder, characterized in that the diffusing layer (22) comprises particles that absorb ultraviolet radiation in the 250 to 400 nm range, said absorbent particles being formed by oxides having ultraviolet absorption properties.