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US 2003/0148869 A1Published application
Grey glass compositions of the silica-soda-lime type
AssigneeSaint-Gobain Glass France
InventorsAnne Berthereau, Dominique Sachot
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Abstract
The invention concerns a grey glass composition of the soda-lime type having a global light transmission under an illuminant A (TLA) more than 15% for a glass thickness equal to 4.85 mm, said composition comprising colouring agents as follows in the following weight percentage limits: Fe2O3: 0.25-0.65%, preferably 0.3-0.6% and more preferably still 0.3-0.4%; CoO: 150-250 ppm and preferably>185 ppm; NiO: 650-1000 ppm; Se<5 ppm.
Claims16
A grey glass composition of the silica-soda-lime type comprising the following coloring agents within the following weight limits:
- 10 Fe2O3 0.25-0.7% CoO 150-250 ppm NiO 650-1000 ppm Se <5 ppm,
- wherein the composition has an overall light transmission under illuminant A (TLA) of greater than 15% for a glass thickness equal to 4.85 mm
Dependencies are inferred from the claim text.