Abstract: Vitrified products are manufactured using a melt produced from batch materials comprising 35 to 100 w % man-made mineral fibers produced in a submerged combustion melter.

Abstract: A method for cutting glass is disclosed. A glass substrate is provided, the glass substrate includes at least one cutting surface, some micro-fractures are formed on the cutting surface. A conductivity material is provided and coated on the cutting surface to form a conductivity material layer. The conductivity material layer can absorb laser energy. The conductivity material layer is irradiated by laser. The glass substrate adjoined to the cutting surface is fused to repair the micro-fractures.

Abstract: A method of making soda-lime glass using 100 wt % cullet as the glass forming materials is disclosed. Also disclosed is a soda-lime glass container made according to this method.

Abstract: A method is provided of refurbishing a quartz glass component which has been contaminated and eroded due to continuous use in a plasma process apparatus for semiconductor manufacturing. In the method, a surface deposit on the quartz glass component is removed by an appropriate cleaning method which is determined depending on the contamination status, and presence or absence of residual deposit on the cleaned component is carefully inspected through irradiating with light of a predetermined wavelength to cause fluorescence effect. Then the eroded portion of the quartz glass component is restored to the original state by flame treatment and precision machining. As a result, the refurbishment method can increase the mechanical strength of the quartz glass component, enhance the productivity and yield ratio through efficient use of the remaining materials of the quartz glass.

Abstract: A batch charger for charging batch materials into a glass melting furnace at a level located below the level of the molten glass, including: a body including a barrel and a mechanical system for conveying batch materials, the mechanical system being housed in the barrel; and a head removably fastened to an end of the barrel, and including a slide gate damper, and a tubular connecting part fastened to the slide gate damper and configured to be at least partially inserted into a charging orifice provided in a wall of a tank of the furnace, the slide gate damper and the connecting part including a system of internal ducts that can be connected to a source of coolant. A melting installation and a process can use such a batch charger.

Abstract: The present invention concerns a method of making a mineral melt by burning combustible material in the presence of inorganic particulate material and thereby forming a melt, comprising injecting fuel, particulate mineral material and combustion gas into a circulating combustion chamber (1) through an inlet conduit (4) and combusting the fuel in the circulating combustion chamber (1) thereby melting the mineral material to form a mineral melt and generating exhaust gases; separating the exhaust gases from the mineral melt, collecting the mineral melt (9) and passing the exhaust gases upwards through an exhaust pipe (10) to a conduit (11) of a heat exchange system; and supplying particulate mineral material and a first portion of waste mineral wool into the conduit (11) and pre-heating the supplied material in the heat exchange system, and supplying a second portion of waste mineral wool with a water content between 5 and 25% by weight directly to the inlet conduit (4).

Abstract: A silicon component in a processing chamber for performing an etching process on a substrate is provided. The silicon component contains recycled silicon obtained by a silicon component recycling method including: collecting silicon wastes from any one of a silicon component for a plasma etching apparatus and a silicon ingot for a semiconductor wafer; obtaining a content of impurity based on an electric characteristic of the collected silicon wastes; determining an input amount of the silicon wastes, an input amount of a silicon source material, and an input amount of impurity based on the content of impurity obtained in the measurement process and a target value of an electric characteristic of a final product; manufacturing a silicon ingot by inputting the silicon wastes, the silicon source material, and the impurity into a crucible; and manufacturing the final product using the silicon ingot.

Abstract: The invention provides a glazed composite manufactured using waste materials, wherein the waste materials are capable of producing ceramic forming oxides, glass modifying oxides and ceramic modifying oxides. The waste materials include ceramic waste and colored glass waste. The invention also provides a method for manufacturing composition of the glazed composite.

Abstract: The invention relates to a method for cutting a strengthened glass sheet in which, when a strengthened glass sheet 10 including a front surface layer 13 and a rear surface layer 15 which have a residual compressive stress, and an intermediate layer 17 which has an inside residual tensile stress, is cut by moving an irradiation region 22 of a laser beam so as to have a predetermined curvature radius, an irradiation energy per unit irradiation area of a laser beam 20 to be irradiated on the strengthened glass sheet 10 is increased as a curvature radius decreases. Thereby, it is possible to cut a strengthened glass sheet using a laser beam without causing a deterioration of quality.

Abstract: An apparatus for separating a panel from a cathode ray tube may include a trough, at least one chipping element mounted in the trough; and a vibrator connected to the trough and configured such that actuation of the vibrator causes the chipping element to vibrate at a frequency and at a throw angle selected to cause the chipping element to throw a cathode ray tube placed in contact therewith upward, then move upward subsequently to contact a downwardly moving cathode ray tube with sufficient force to chip away funnel and frit therefrom. A method for separating a panel from a cathode ray tube may include contacting a funnel of the cathode ray tube with at least one chipping element, and vibrating the chipping element with sufficient force to chip at least the funnel from the cathode ray tube, leaving at least the panel.

Abstract: A substrate processing chamber component has a structural body with localized surface regions having annealed microcracks. The annealed microcracks reduce crack propagation and increase fracture resistance. In one method of manufacture, the structural body of the component is formed, and a laser beam is directed onto localized surface regions of the body for a sufficient time to anneal the surface microcracks.

Abstract: Method for treating continuous fibreglass filament waste, including comminuting the waste to obtain comminuted fibre pieces of predetermined size; continuously feeding a feedstock of comminuted fibre pieces to a heat treatment; and heating the feedstock of comminuted fibre pieces to cause, in succession, the elimination of any moisture content, the evaporation of volatile components of an organic coating of the continuous fibre, and the combustion of residual components of the organic coating. The feedstock of comminuted fibre pieces is fed to the heat treatment as a web of material. At least the combustion of residual components of the organic coating takes place in a tunnel furnace including heat sources provided above and below the web of material. During the heat treatment, the feedstock of comminuted fibre pieces moves continuously forward, and is brought, in a progressively rising way, from a starting temperature to a final heating temperature greater than the softening point of fibreglass.

Abstract: In a method of manufacturing a glass plate for a display device, a protection film is formed on a mother glass plate. The protection film is patterned to form a protection film pattern which prevents ion exchange. Chemically strengthening the mother glass plate includes exchanging alkaline ions of the mother glass plate including the protection film pattern are exchanged with metal ions of a molten salt to form a first chemically strengthened portion, a non-strengthened portion and a second chemically strengthened portion. The upper surface of the protection film pattern is cut in the scribe line area to separate the glass plate at the non-strengthened portion of the mother glass plate, from the mother glass plate.

Abstract: A method for repairing a damage site on a surface of an optical material is disclosed. The method may involve focusing an Infrared (IR) laser beam having a predetermined wavelength, with a predetermined beam power, to a predetermined full width (“F/W”) 1/e2 diameter spot on the damage site. The focused IR laser beam is maintained on the damage site for a predetermined exposure period corresponding to a predetermined acceptable level of downstream intensification. The focused IR laser beam heats the damage site to a predetermined peak temperature, which melts and reflows material at the damage site of the optical material to create a mitigated site.

Abstract: Disclosed herein are methods for strengthening glass articles having strength-limiting surface flaws, together with strengthened glass articles produced by such methods, and electronic devices incorporating the strengthened glass articles. The methods generally involve contacting the glass articles with a substantially fluoride-free aqueous acidic treating medium for a time at least sufficient to increase the rupture failure points of the glass articles.

Abstract: A cover glass structure includes a glass substrate, a touch-sensing structure and a decorative layer. The glass substrate has at least one cutting section, and the cutting section is etched to form an etched structure. The touch-sensing structure is disposed on the glass substrate, and the decorative layer is disposed on the glass substrate.

Abstract: A method of making a mirror from a single crystal blank may include fine grinding top and bottom surfaces of the blank to be parallel. The blank may then be heat treated to near its melting temperature. An optical surface may be created on an optical side of the blank. A protector may be bonded to the optical surface. With the protector in place, the blank may be light weighted by grinding a non-optical surface of the blank using computer controlled grinding. The light weighting may include creating a structure having a substantially minimum mass necessary to maintain distortion of the mirror within a preset limit. A damaged layer of the non-optical surface caused by light weighting may be removed with an isotropic etch and/or repaired by heat treatment. If an oxide layer is present, the entire blank may then be etched using, for example, hydrofluoric acid. A reflecting coating may be deposited on the optical surface.

Abstract: A technology for remedying a defect in a glass substrate which constitutes a display panel. There is provided a method of remedying a defect in a glass substrate which constitutes a display panel, which method includes performing grinding of glass material, until reaching internal bubble (1b) from surface (1s) of glass substrate (1), with respect to a region where the internal bubble (1b) occurring within the glass substrate (1) is positioned and further also grinding off a glass material position surrounding the internal bubble (1b).

Abstract: Strengthened glass substrate sheets and methods of fabricating glass panels from glass substrate sheets are disclosed. In one embodiment, a method includes forming at least one series of holes through a thickness of the glass substrate sheet, wherein the at least one series of holes defines a perimeter of the glass panel to be separated from the glass substrate sheet. The method further includes strengthening the glass substrate sheet by a strengthening process, and separating the glass panel from the glass substrate sheet along the at least one series of holes. At least a portion of one or more edges of the glass panel has an associated edge compressive layer. In another embodiment, a strengthened glass substrate sheet includes at least one series of holes that defines a perimeter of one or more glass panels to be separated from the strengthened glass substrate sheet.

Abstract: It is an object of the present invention to provide a new method for reducing the diameter of a bubble existing in a glass plate. Specifically, the present invention provides a method for reducing the diameter of a bubble existing in a glass plate, which comprises irradiating the vicinity of the bubble existing in the glass plate with a light beam emitted from a light source, to raise the temperature of the glass in the vicinity of the bubble to at least the melting point of the glass to reduce the maximum diameter of the bubble.

Abstract: A technology for remedying a defect in a glass substrate which constitutes a display panel. There is provided a method of remedying a defect in a glass substrate which constitutes a display panel, which method includes performing grinding of glass material, until reaching internal bubble (1b) from surface (1s) of glass substrate (1), with respect to a region where the internal bubble (1b) occurring within the glass substrate (1) is positioned and further also grinding off a glass material position surrounding the internal bubble (1b).

Abstract: A situation where glass chip produced as a result of breakage of waste glass sheets floats in a cutting chamber when the waste glass sheets produced in glass sheet producing steps are collected is suppressed. Provided is a glass sheet production installation (1), in which a sheetshaped glass ribbon (B) is formed by supplying molten glass (A) into a forming body (2) and causing the molten glass (A) to flow downward on a conveyance path extending in an upper and lower direction from the forming body (2), and the glass ribbon (B) is cut into a predetermined dimension in a cutting chamber (6) provided on the conveyance path so that glass substrates (C) are produced.

Abstract: Green glass content of mixed color glass cullet is selectively decolorized by using copper oxide and is used as an input component in a conventional glass production process. To determine how much copper oxide to add, the weight percent of green glass in the provided glass cullet supply is determined and an effective amount of copper oxide to, at least partially, decolorize the green glass is determined wherein an effective amount is determined using a non-linear inverse prediction model between the weight percent of green glass or chromium and/or iron content and the copper oxide. The amount of copper oxide is thus non-linearly adjusted for increasing levels of green glass in the glass batch. To compensate for the darkening of the glass by the additional copper oxide, the redox of the glass may be made slightly less reducing as the amount of chrome and copper is increased.

Abstract: A technology for remedying a defect in a glass substrate which constitutes a display panel. There is provided a method of remedying a defect in a glass substrate which constitutes a display panel, which method includes performing grinding of glass material, until reaching internal bubble (1b) from surface (1s) of glass substrate (1), with respect to a region where the internal bubble (1b) occurring within the glass substrate (1) is positioned and further also grinding off a glass material position surrounding the internal bubble (1b).

Abstract: To provide a bonded glass cutting method whereby it is possible to suppress an occurrence of a crush or chipping when bonded glass is cut, and cut the bonded glass into pieces of a predetermined size, a package manufacturing method, a package, a piezoelectric vibrator, an oscillator, an electronic device, and an atomic timepiece. A bonded glass cutting method includes a scribing step, which irradiates a lid substrate wafer with a laser beam with a wavelength absorbed by a wafer bonded body along outlines, thus forming scribe lines on the lid substrate wafer, and a breaking step which, by cutting the wafer bonded body by applying a fracture stress to the scribe lines, dices the wafer bonded body into a plurality of piezoelectric vibrators, wherein a cutting step is carried out in a condition in which the wafer bonded body is placed on silicon rubber, and an outside end face of the lid substrate wafer is caused to face the silicon rubber.

Abstract: Methods and apparatus for refining and delivering a supply of molten glass include melting a supply of glass in a melter and discharging a stream of molten glass. A refining section is provided to refine the molten glass discharged by the melter and to deliver the molten glass downstream to a glass forming apparatus. The refining section is mounted for movement into and out of contact with the stream of molten glass to connect and disconnect the glass forming apparatus with the stream of molten glass.

Abstract: A system for and method of analyzing a cullet stream prior to batch formulation in glass manufacturing. Cullet is fed onto a conveyor where a real-time composition analysis is performed. Contaminants are optionally removed, and a determination is made as to whether the cullet batch color is consistent with a predetermined tolerance threshold. If necessary, the glass batch formulation is modified in view of the cullet analysis. Virgin raw materials requirements of the modified glass batch formulation may then be communicated to the batch controller before sending batch ingredients to the mixing stage and completing the overall glass manufacturing process.

Abstract: Certain preferred embodiments of the present invention provide a system for and method of analyzing and cleaning a cullet stream prior to bottle manufacturing. In accordance with certain aspects of the present invention, the system includes a raw materials feeder, a mixing stage, a melting stage, a bottle-forming stage, a cooling/annealing stage, an inspection stage, and a batch controller. The raw materials feeder further includes a cullet bin within which is cullet supply, a feeder, an analysis device, and removal assembly. Certain preferred embodiments of the method include the steps of feeding cullet onto the conveyor, performing real-time composition analysis of the cullet, removing contaminants from the cullet, determining whether the cullet batch is consistent with a predetermined tolerance threshold, adjusting the glass batch formulation, sending the batch ingredients to the mixing stage, and then completing the overall glass manufacturing process.

Abstract: There is provided a process for smoothing a substrate surface having a concave defect, such as a pit or a scratch. A process for smoothing a surface of a glass substrate for a reflective mask blank used in EUV lithography, comprising disposing a thin film on a glass substrate; detecting a concave defect existing on the glass substrate; and locally heating or locally anodizing a portion of the thin film just above the detected concave defect to perform a chemical reaction accompanied by a volume increase in a material forming the thin film.

Abstract: A method is provided of refurbishing a quartz glass component which has been contaminated and eroded due to continuous use in a plasma process apparatus for semiconductor manufacturing. In the method, a surface deposit on the quartz glass component is removed by an appropriate cleaning method which is determined depending on the contamination status, and presence or absence of residual deposit on the cleaned component is carefully inspected through irradiating with light of a predetermined wavelength to cause fluorescence effect. Then the eroded portion of the quartz glass component is restored to the original state by flame treatment and precision machining. As a result, the refurbishment method can increase the mechanical strength of the quartz glass component, enhance the productivity and yield ratio through efficient use of the remaining materials of the quartz glass.

Abstract: A decorative structure comprises a frame completely surrounding a space and a front and rear barrier material applied to front and rear surfaces of the frame enclosing the space to form a three dimensional structure. The space located between the front and rear barrier material and the frame, is filled with pieces of waste glass, or other recycled material, which has been processed to have smoothened surfaces and provide a decorative appearance. At least the front barrier material has sufficient transparency so that the decorative appearance of the waste material held behind the barrier is visible.

Abstract: To provide a method for smoothing a surface of a glass substrate having a concave defect, such as a pit or a scratch. A method for smoothing a surface of a glass substrate having a concave defect thereon, comprising: forming a film on the surface of the glass substrate having the concave defect by a dry deposition method, the film comprising a glass material having a fluid point Tf of 150° C. or above and of not higher than a strain point Ts (° C.) of the glass substrate; and heating the film of the glass material at a temperature of not lower than Tf and not higher than Ts to put the film in such state that the film of the glass material can flow so as to bury the concave defect, followed by cooling the film of the glass material, thereby to smooth the surface of the glass substrate having the concave defect.

Abstract: A method of repairing radiation-induced damage and reducing accumulated laser-induced wavefront distortion and polarization-induced birefringence in a fused silica article, such as a lens in a DUV optical system, prisms, filters, photomasks, reflectors, etalon plates, and windows. The distortion is reduced by irradiating the fused silica article with an irradiation source, such as an infrared laser. The radiation causes localized heating which repairs at least a portion of the fused silica lens. A fused silica lens that has been treated by the method and a lithographic system are also described.

Abstract: A soda-lime glass substrate formed through a heat-treatment method has an absorption coefficient ranging from about 0.15 ?,W/m·K to about 0.54 ?,W/m·K, and a free path length ranging from about 0.12 cm to about 0.24 cm. The heat-treated soda-lime glass substrate is formed by heating for a selected time at a pre-specified maximum temperature of about 270° C. to about 330° C. so as to remove thermally induced residual deformations from the substrate and then the substrate is slowly cooled so as to substantially avoid reintroducing thermally induced residual deformations into the cooling substrate. Thus, the soda-lime glass substrate is transformed to one at or close to its contraction saturation point. This allows the heat-treated soda-lime glass substrate to serve in a practical way as a substrate of a flat display panel.

Abstract: A technology for remedying a defect in a glass substrate which constitutes a display panel. There is provided a method of remedying a defect in a glass substrate which constitutes a display panel, which method includes performing grinding of glass material, until reaching internal bubble (1b) from surface (1s) of glass substrate (1), with respect to a region where the internal bubble (1b) occurring within the glass substrate (1) is positioned and further also grinding off a glass material position surrounding the internal bubble (1b).

Abstract: To provide a technique with which a quartz glass jig and a doped quartz glass jig are regenerated by completely removing the impurities which are attached to the surface and the impurities which have diffused into the interior from quartz glass jigs which have been used in semiconductor production processes and then carrying out working repair and removing the contamination from the working processes as well. After use, the impurities are removed from the aforementioned quartz glass jigs in the said purification treatment process which includes a purification treatment process in which the quartz glass jigs are subjected to a purification treatment in a gaseous atmosphere which includes a halogen element at a temperature within the region above a prescribed temperature.

Abstract: A method of repairing radiation-induced damage and reducing accumulated laser-induced wavefront distortion and polarization-induced birefringence in a fused silica article, such as a lens in a DUV optical system, prisms, filters, photomasks, reflectors, etalon plates, and windows. The distortion is reduced by irradiating the fused silica article with an irradiation source, such as an infrared laser. The radiation causes localized heating which repairs at least a portion of the fused silica lens. A fused silica lens that has been treated by the method and a lithographic system are also described.

Abstract: Certain preferred embodiments of the present invention provide a system for and method of analyzing and cleaning a cullet stream prior to bottle manufacturing. In accordance with certain aspects of the present invention, the system includes a raw materials feeder, a mixing stage, a melting stage, a bottle-forming stage, a cooling/annealing stage, an inspection stage, and a batch controller. The raw materials feeder further includes a cullet bin within which is cullet supply, a feeder, an analysis device, and removal assembly. Certain preferred embodiments of the method include the steps of feeding cullet onto the conveyor, performing real-time composition analysis of the cullet, removing contaminants from the cullet, determining whether the cullet batch is consistent with a predetermined tolerance threshold, adjusting the glass batch formulation, sending the batch ingredients to the mixing stage, and then completing the overall glass manufacturing process.

Abstract: Disclosed are a method and system for removing scratches from a planar panel of translucent or transparent material, such as glass, without removal from its frame. A heat source supplying a controlled amount of heat is moved across the surface of the planar panel at a controlled velocity and at a controlled distance from the surface so as to progressively melt a thin surface layer at portions of the surface heated by the moving heat source. The melted material re-flows under surface tension to smooth scratches in the surface layer. Movement of the heat source is repeated over different portions of the surface until all scratched areas have been treated. The treated panels have a smooth surface with scratches removed, and have good optical and structural qualities.

Abstract: A method for producing CRT funnel glass having a glass composition containing MgO, CaO, SrO, BaO and ZnO as essential components. Further, the total content of MgO, CaO, SrO, BaO and ZnO falls within a range of 5 to 13 mass %. As a glass material of the CRT funnel glass, CRT panel glass or CRT neck glass may be used. The method comprises preparing the glass material so as to contain MgO, CaO, SrO, BaO, and ZnO as essential components and so that the total content of MgO+CaO+SrO+BaO+ZnO falls within a range of 5 to 13 mass %; and melting the glass material.

Abstract: On producing CRT funnel glass from CRT panel glass or CRT frit, Fe2O3 is added in a range of 0.05 to 1 mass % so that the fluctuation of transmittance of light having a wavelength of 1,050 nm becomes 10% or less, at a thickness of 10 mm of the produced CRT funnel glass.

Abstract: A reforming process of a quartz glass crucible in which the quartz glass crucible is reformed by an arc discharge generated by electrodes positioned around a rotational axis and configured to heat an inside surface of the crucible while the crucible is rotated. The process includes arranging electrodes in an electrode structure such that neighboring electrodes are positioned at regular intervals in a ring-like configuration; forming a stable ring-like arc between the neighboring electrodes, without generating a continuous arc between electrodes facing each other across a central portion of the ring-like configuration; heating the inside surface of the crucible; and removing a foreign substance located on the inside surface of the crucible or a bubble located under the inside surface of the crucible.

Abstract: A kit for repairing a windshield break utilizing a light activated resin includes a light impervious pedestal and resin chamber with the pedestal being placed in airtight engagement about a windshield break. The kit also includes a syringe which is couplable to an opening in the chamber. The light activated resin is carried in a light impervious container having a neck dimensioned to deposit the resin directly into the chamber before the syringe is coupled to the chamber. The kit additionally includes a light transmissive film to cover the resin filled break during curing of the resin and a light impervious patch for covering the opposite face of the windshield.

Abstract: A method of treating a rock chip in a vehicular windshield consists of the step of inscribing in the glass of the vehicular windshield a circular crack barrier that surrounds the rock chip. Any cracks emanating from the rock chip tend to remain confined within the circular crack barrier.

Abstract: Embodiments include a method for forming a glass which displays visible cracking prior to failure when subjected to predetermined stress level that is greater than a predetermined minimum stress level and less than a failure stress level. The method includes determining a critical flaw size in the glass and introducing a residual stress profile to the glass so that a plurality of visible cracks are formed prior to failure when the glass is subjected to a stress that is greater than the minimum stress level and lower than the critical stress. One method for forming the residual stress profile includes performing a first ion exchange so that a first plurality of ions of a first element in the glass are exchanged with a second plurality of ions of a second element that have a larger volume than the first ions. A second ion exchange is also performed so that a plurality of the second ions in the glass are exchanged back to ions of the first element.

Abstract: A process for producing surface-sealed hollow glass containers, wherein as part of the production process the hollow glass containers are coated with a water-based cold end coating composition in the region of the exit from the annealing lehr, which is arranged following a machine for producing hollow glass containers, where the cold end coating composition comprises the following components: I. a water-based organopolysiloxane-containing composition prepared from alkoxysilanes which carry a functional group and alkoxysilanes which are selected from trialkoxysilanes, dialkoxysilanes and tetraalkoxysilanes, and II. a silicon-free component selected from a wax, a partial fatty acid ester, a fatty acid and/or a surfactant. The hollow glass containers produced in this way feature an enhanced long-term service strength.

Abstract: A large tumbling device into which broken pieces of labeled glass such as beverage bottles, or cullet, are fed. After entering the interior chamber of the tumbler, the cullet is carried by a plurality of interior fins along the inside circumference of the tumbler to a point where the glass falls back to the low point of the tumbler. During this fall, the cullet passes through a flame generated in the interior cavity of said tumbler. The glass is heated to a temperature well below 600 degrees Fahrenheit (the temperature at which the molecular structure of glass begins to change) therefore ensuring that the processed glass retains its original properties. This process is repeated numerous times, ensuring that all of the foreign material is removed, before the cullet passes through the entirety of the chamber and is cooled to be processed into the desired grades.

Abstract: A method of providing a protective layer for a glass sheet. The protective layer provided by depositing a solution of a polymer and water on a glass sheet at a temperature high enough to provide a layer that is insoluble in water below a temperature of about 20° C. The layer is soluble in water at a temperature above about 60° C., so that the protective layer can be removed by rinsing in hot water.

Abstract: Mixed colored cullet glass, which generally contains amounts of green, amber and flint (colorless) glasses, is recycled into amber colored glass by regulating the additive amounts of amounts of iron, carbon, sulfur, and sulfur compounds in the mixture to impart the desired reddish-brown hue. The color green may be selectively decolorized from the mixed colored cullet and the mixed colored cullet may be colorized for the color amber, thereby rendering the decolorized mixed colored cullet substantially amber colored for use in amber colored glass production, such as carbon-sulfur soda lime amber glass. The technique of the invention is also used to produce recycled green or flint glass from unsorted mixed colored cullet glass. The invention is particularly useful in producing amber colored containers or bottles for beverages that require protection from the deteriorating effects of light, such as beer.

Abstract: The melting tub for producing the molten mass from a mixture of raw material is associated with an additional melting unit by means of which a recycled molten mass is obtained from mineral wool waste largely corresponding to the molten mass obtained from the mixture of raw materials in quality and composition. The recycled molten mass is supplied to the molten mass in the melting tub through a suitable introduction device. The recycling exhaust gas from the additional melting unit is fed to the tub exhaust gas, and the mixture of exhaust gas is utilised for pre-heating combustion air and mixture of raw materials.