Grey soda-lime glass

Details Grey soda-lime glass Grey soda-lime glass

C - Chemistry, Metallurgy

03

C

C03C 4/02 (2006.01) C03C 3/078 (2006.01) C03C 3/087 (2006.01) C03C 4/08 (2006.01)

Patent

CA 2148954

Grey soda-lime glass is composed of main glass-forming constituents together with iron, selenium, cobalt and chromium as colouring agents in the following quantities: Fe2O3 0.5 to 0.9% Co 0.012 to 0.025% Se 0.0025 to 0.010% Cr2O3 0.005 to 0.020%. The proportions of colouring agents are such that the glass has a lighttransmission factor (TL) of less than 30% and an excitation purity (P) of less than 12%. The dark grey glass is especially appropriate for installation in the sunroofs of cars.

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