In order to provide a method which can produce red glass vessels and which is attended by low cost in respect of the raw materials/starting materials and also in respect of control of process parameters, an appropriate method for producing red glass vessels is proposed in which a colourless molten glass composition containing at most 3% by mass of tin oxide and at most 3% by mass of copper oxide is produced, where the resultant colourless molten glass composition is refined under neutral conditions with sodium sulphate and/or calcium sulphate and with a carbon-containing reducing agent with a molar carbon/sulphate ratio of from 0.5 to 5, where glass vessels are moulded from said refined glass composition, and where the glass vessels are cooled to a temperature of below 520 degrees C. to 580 degrees C.

The present invention relates to an article comprising a substrate having a main surface coated with a mesoporous antistatic coating, said coating having a refractive index lower than or equal to 1.5, and a silica based matrix functionalized by ammonium groups, said matrix having a hydrophobic character. Under certain conditions, the mesoporous antistatic coating is a single-layer anti-reflection coating or is part of a multi-layer anti-reflection coating. This invention further relates to a method for manufacturing said article, and to the use of a mesoporous coating having a silica based matrix functionalized by ammonium groups, as an antistatic coating.

A glass comprising a coefficient of thermal expansion (CTE) of 7010.sup.7/ C. or less, a liquidus viscosity of at least 150 kP, and Li.sub.2O in an amount of 0.1 wt. % or less, wherein the glass is ion-exchangeable. A glass, comprising SiO.sub.2 in an amount of 64-73 wt. %, Al.sub.2O.sub.3 in an amount of 7-15 wt. %, B.sub.2O.sub.3 in an amount of 9-11 wt. %, Na.sub.2O in an amount of 6-9.5 wt. %, K.sub.2O in an amount of 0.5-3 wt. %, CaO in an amount of at least 0.05 wt. %, and Li.sub.2O in an amount of less than 0.1 wt. %, wherein a weight ratio of Na.sub.2O/Al.sub.2O.sub.3 is less than or equal to 0.9. A method of recycling glass, the method comprising heating a composition to form a melt, the composition comprising glass cullet in an amount of at least 60 wt. %, and raw materials in an amount of 40 wt. % or less.

The present invention relates to a float glass substrate including an alkali-free glass, the float glass substrate having a Cl content of from 0.10 to 0.50 mass %, containing substantially no SnO.sub.2, and having a Pt content of, by mass, from 0.001 to 0.30 ppm. The float glass substrate may have a Rh content of, by mass, from 0.001 to 0.50 ppm.

A method of and an arrangement for recycling mineral wool waste to mineral wool production includes at least one melting furnace for melting virgin mineral wool raw material, the melting furnace including an inlet for virgin mineral wool raw material and an outlet for molten mineral wool material, a production line connected to the outlet for molten mineral wool material for producing a mineral wool product from the molten mineral wool material. The production line includes a curing oven, a fluidized bed reactor including an exhaust gas duct, an inlet for predetermined primary fuel, an inlet for predetermined bed material, and an outlet for an ash material, the ash material including bottom ash discharged via a bottom outlet from the fluidized bed reactor or fly ash separated by a particle separator from exhaust gas in the exhaust gas duct or a mixture of the bottom ash and the fly ash.

In a melting step (S1) of generating a molten glass (Gm) by heating and melting glass raw materials (Gr) corresponding to raw materials for a glass article in a melting furnace (10), the glass raw materials (Gr) are heated and molten through combustion of fuel (FH) containing hydrogen, and a water vapor partial pressure (Pp) in the melting furnace (10) is set to 80% or less of a total atmospheric pressure (Pt).

A system for producing a stream of glass sand from mixed recyclables comprises first and second pulverizing system, each comprising a size-reducing pulverizer and a size-separating trommel. The pulverizers and trommels are heated, so as to also serve as driers.

Provided are flat-cross-section glass fiber that is superior in continuous-production efficiency and mass-production suitability and able to give superior reinforcing ability for resin molded products, and a method for manufacturing flat-cross-section glass fiber from a glass raw material containing a recycled glass material. In the flat-cross-section glass fiber of the present invention, flat-cross-section glass filaments constituting the flat-cross-section glass fiber each have a flat cross-sectional shape having a major axis with a length in a specific range and a minor axis with a length in a specific range, and the coefficient of variation for the lengths of the minor axes is within the range of 8.0 to 26.1%.

A method provides for producing modifications in or on a transparent workpiece using a laser processing device. The laser processing device has a short pulse or ultrashort pulse laser that emits laser radiation having a wavelength in the transparency range of the workpiece and which has a beam-shaping optical unit for beam shaping for focusing the laser radiation. The transparent workpiece is composed of a material that has a plurality of phases, of which at least two phases have different dielectric constants, of which in turn the one phase is a phase embedded in the form of particles, which phase is substantially surrounded by the other phase, and wherein the product of the volume of the particles specified in cubic nanometers and the ratio of the absolute value of the difference of the two different dielectric constants to the dielectric constant of the surrounding phase is greater than 500.

Apparatus, system, and method for blending batch and cullet at a predetermined cullet ratio for feeding to a furnace. It includes a first hopper for holding cullet; a second hopper for holding batch; feeder associated with the second hopper; a chamber positioned to receive cullet from the first hopper, an inlet spout configured to receive cullet from the first hopper so that cullet flood feeds into the chamber to keep it constantly filled with cullet up to its angle of repose, and an outlet spout; a chute positioned to receive batch from the feeder and extending into the chamber and having a chute outlet having a diameter equal to or larger than the outlet spout; a charger for receiving mixed batch and cullet from the chamber; and a controller operatively connected to the feeder and to the charger.