Abstract: A process for reinforcing a glass-ceramic article, into which a maximum tension is introduced beneath the surface of the glass-ceramic, advantageously in proximity to said surface. The invention also relates to an enamel that can be used for this reinforcement, this enamel being formed from a glass frit having the following composition, the proportions being expressed as weight percentages: SiO2 50-66% MgO 3-8% Na2O ?7-15% K2O 0-3% Li2O ?0-12% CaO ?0-10% BaO ?0-15% Al2O3 0-3% ZrO2 0-3% ZnO 0-5% B2O3 0-8% the sum of the alkaline-earth metal oxides CaO+BaO moreover being between 8 and 15%, and the sum of the alkali metal oxides Na2O+K2O+Li2O moreover being between 7 and 20%. The reinforced glass-ceramics obtained by the process.

Abstract: A cooking hob, or a ceramic hob, for a fixed or mobile cooking appliance, the hob including at least one cooking area and at least one control and/or information area, the control and/or information area being formed by a window separated from the cooking area by at least one joint made of synthetic material. The joint includes a mechanism for fixing a control and/or display screen under the window.

Abstract: The present invention relates to a process for reinforcing a glass-ceramic article, into which a maximum tension is introduced beneath the surface of the glass-ceramic, advantageously in proximity to said surface. The invention also relates to an enamel that can be used for this reinforcement, this enamel being formed from a glass frit having the following composition, the proportions being expressed as weight percentages: SiO2 50-66% MgO 3-8% Na2O ?7-15% K2O 0-3% Li2O ?0-12% CaO ?0-10% BaO ?0-15% Al2O3 0-3% ZrO2 0-3% ZnO 0-5% B2O3 0-8% the sum of the alkaline-earth metal oxides CaO+BaO moreover being between 8 and 15%, and the sum of the alkali metal oxides Na2O+K2O+Li2O moreover being between 7 and 20%. The invention also relates to the reinforced glass-ceramics obtained.

Abstract: A glass-ceramic plate of lithium aluminosilicate free of arsenic and antimony, the optical transmission of which, for a thickness of 4 mm, is between 0.2 and 4% for at least one wavelength between 400 and 500 nm.

Abstract: The present invention relates to an article having at least one colored luminous zone, in particular a display zone, said article comprising at least one glass-ceramic substrate having a luminous transmission ranging from 0.8% to 40% and an optical transmission of at least 0.1% for at least one wavelength in the range extending from 420 to 780 nm, at least one light source and at least one filter so as to form at least one colored luminous zone, in particular a display zone, in at least one zone of the plate.

Abstract: A process for reinforcing a glass-ceramic article, into which a maximum tension is introduced beneath the surface of the glass-ceramic, advantageously in proximity to said surface. The invention also relates to an enamel that can be used for this reinforcement, this enamel being formed from a glass frit having the following composition, the proportions being expressed as weight percentages: SiO2 50-66%? MgO 3-8% Na2O 7-15%? K2O 0-3% Li2O 0-12%? CaO 0-10%? BaO 0-15%? Al2O3 0-3% ZrO2 0-3% ZnO 0-5% B2O3 0-8% the sum of the alkaline-earth metal oxides CaO+BaO moreover being between 8 and 15%, and the sum of the alkali metal oxides Na2O+K2O+Li2O moreover being between 7 and 20%. The reinforced glass-ceramics obtained by the process.

Abstract: The subject of the invention is an induction cooking device comprising at least one inductor positioned under a thermally strengthened glass plate, the composition of which glass is not of lithium aluminosilicate type, characterized in that the glass has the following characteristics: its thickness is at most 4.5 mm, the c/a ratio of the glass before strengthening is at most 3.0 after Vickers indentation under a load of 1 kg, c being the length of the radial cracks and a being the half-diagonal of the Vickers impression, the ?/(e.E.?) ratio is at least 20 K.mm?1, or even 30 K.mm?1, ? being the maximum stress generated at the core of the glass by the thermal strengthening in Pa, e being the thickness of the glass in mm, E being the Young's modulus in Pa and ? being the linear thermal expansion coefficient of the glass in K?1.

Abstract: A glass-ceramic panel, which may cover or receive at least one heating element, and may serve as a cook-top The panel is coated, in at least one region of a face, with a coating such that the total color difference delta E*, measured on the opposite face, between said coated region and an uncoated region, is less than about 1 and/or such that this coating has a luminance L* of greater than about 70. A process for manufacturing the panel and a cooking device comprising said panel.

Abstract: An article including at least one lighting zone, manufacture of the article, and a cooking apparatus including such an article when in a form of a glass-ceramic plate. The article includes at least one glass-ceramic substrate, and at least one light guide, the light guide coupled to at least one light source on one side outside of the lighting zone, and including, in the lighting zone, at least one mechanism of extracting radiation emitted by the light source.

Abstract: The subject of the invention is an induction cooking device comprising at least one inductor positioned under a thermally or chemically strengthened glass plate, the composition of the glass being of lithium aluminosilicate type.

Abstract: One subject of the invention is a cooking device comprising internal elements including at least one heating means, control and/or monitoring means and at least one light-emitting device, said internal elements being covered with at least one glass or glass-ceramic plate colored using vanadium oxide, at least one light-emitting device not being of red color seen through said plate, said plate intrinsically having a light transmission ranging from 2.3% to 40% and an optical transmission of at least 0.6% for at least one wavelength within the region ranging from 420 to 480 nm, said cooking device being such that at least one masking means intended to mask at least one part of said internal elements is placed on top of, underneath or within said plate.

Abstract: Display assembly 1 comprising, on the one hand, a glass-ceramic plate 2 of the lithium aluminosilicate type, the optical transmission of which for a thickness of 4 mm is between 0.2% and 4% for at least one wavelength between 400 and 500 nm and, on the other hand, a luminous device 4, characterized in that the luminous device 4 comprises at least one polychromatic light source 5 having at least a first emission of nonzero intensity at said wavelength between 400 and 500 nm and at least a second emission of more than 500 nm, and such that the positioning of said source 5 is designed to allow display through said glass-ceramic plate 2.

Abstract: A glass-ceramic plate, and production methods and apparatuses in relation to the plate. The plate is designed for example to equip a cooktop, and includes, on at least one of its faces, a differentiated surface finish formed in the body of the bare glass-ceramic plate.

Abstract: Enamel composition, in particular intended for covering a glass pane of a fireplace insert, comprising at least one glass frit, at least one pigment in a content varying from 40 to 65% of the total weight of the enamel, preferably from 45 to 60%, and optionally at least one vehicle or medium, characterized in that the glass frit comprises the following constituents, within the limits defined below, limits included, expressed as percentages by weight of the total weight of the frit: SiO2 45-65%? Al2O3 0-13% B2O3 23-55%? Na2O 0-10% K2O 0-10% Li2O ?0-10%.

Abstract: The present invention relates to a glass-ceramic plate intended for example to cover or receive at least one heating element, in particular intended to serve as a cooking plate, said plate having a coating comprising at least two contrasted zones. The invention also relates to the method and device for producing the plate and cooking apparatus including said plate.

Abstract: A glass-ceramic plate intended in particular to cover heating elements, and having at least one bevel 35 mm or more wide, a method of manufacturing the plate, and a cooking appliance including the plate.

Abstract: Glass-ceramic plates that may be used to cover or receive at least one heating element of a cooking apparatus include a coating comprising at least two contrasted zones. Methods and devices for producing such glass plates and cooking apparatus are provided.

Abstract: A glass-ceramic plate of lithium aluminosilicate free of arsenic and antimony, the optical transmission of which, for a thickness of 4 mm, is between 0.2 and 4% for at least one wavelength between 400 and 500 nm.

Abstract: The present invention relates to a method of refining lithium aluminosilicate glass capable of being controllably ceramized and free of arsenic oxide, antimony oxide and tin oxide, in which at least 0.05% by weight of at least one sulfide is added to the glass batch materials and said materials are melted at a temperature below 1750° C. The invention also relates to the glass-ceramics obtained from said colored glass, especially glass colored by vanadium oxide, and cooktops and cooking utensils including such glass-ceramics.

Abstract: The present invention relates to a glass-ceramic plate intended for example to cover or accommodate at least one heating element, in particular intended to serve as a hob, said plate being at least partly coated with at least one nanoscale layer based on a metallic material having a refractive index greater than that of the glass-ceramic. The invention also relates to the process for manufacturing the plate, to the screen-printable composition deposited on the plate, and to the cooking appliance comprising said plate.