To raw materials, suitably weighed and mixed, consisting of silica sand (the vitrifying agent), soda (the flux), lime (the stabilizer). The vitrifiable mixture is then introduced into an oven where it is melted at a temperature close to 1550 ° C. The glass in a pasty state is then poured onto a molten tin bath at about 1000 ° C where, having a higher density, it floats. Upon exiting the tin bath, the glass strip is practically rigid and passes through cooling tunnels which lower its temperature from about 600 ° C to room temperature, preparing it for subsequent cutting operations. It is obtained by inserting a core of polyvinyl butyrate (PVB) plastic material between two or more glass plates under the combined action of heat (about 70 ° C) and pressure which have the purpose of expelling.
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