Abstract: A computer implemented method for measuring the viscosity of a fluid stream flowing from an opening with constant acceleration, wherein the method takes as input at least one image of an area of interest of a fluid stream, the section, s0, of the opening and the output volume flow rate, U0, of the fluid stream from said opening; wherein the method provides as output the viscosity, ?, of the fluid; wherein the method includes (a) modelling the geometrical profile of the fluid stream trough an digital processing operation of the input image, and (b) computing the viscosity of the fluid with a mathematical or physical model from the modelled geometrical profile, the section, s0, and the output volume flow rate, U0.

Abstract: The invention relates to a lithium aluminosilicate-type glass-ceramic plate characterized in that it has a chemical composition comprising the following constituents, within the limits defined below expressed in weight percent SnO2 0.05 to <0.35% V2O5 0.05 to 0.40% Fe2O3 >0.30 to 0.40% Cr2O3 0.005 to 0.040%.

Abstract: The invention relates to a process for manufacturing flat glass, comprising the following successive steps: (a) applying a layer of a glass frit to a glass textile, the glass of the frit and of the textile having essentially the same composition, (b) heating the glass textile bearing the layer of glass frit to a temperature T>TL?20° C., TL being the Littleton temperature of the glass frit, for a sufficient length of time to convert the layer of frit into an enamel layer of the same composition as the glass textile, and (c) cooling the glass textile impregnated with the enamel or bearing an enamel layer, obtained in step (b), so as to obtain a glass sheet. It also relates to a glass sheet capable of being obtained by this process.