METHOD FOR TINTING GLASS LENSES AND RELATED GLASS LENSES

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A method for tinting glass lenses, comprising the immersion of a glass lens in a bath comprising at least one salt constituted by a cation selected from the group constituted by a transition metal, a metal of the p block of the periodic table, a rare earth metal, and by an anion selected from the group constituted by a halide, a sulfate, a nitrate; the tinting salt is mixed with another salt constituted by a cation selected from the group constituted by an alkaline metal, an alkaline earth metal, and by an anion selected from the group constituted by a halide, a sulfate, a nitrate. The temperature of the bath is selected in an interval comprised between 350°C and 650°C, the duration of the immersion of the lens in the bath is selected in a time interval comprised between 1 minute and 20 hours, and the concentration of the tinting salt is selected in an interval comprised between 0.1% and 70% by weight with respect to the total weight of the bath; the selection of the temperature of the bath, of the duration of the immersion in the bath and of the composition of the salt bath determine the intensity of the tinting of the glass lens.