Patent ID: 8017537
Filing Date: 2011-09-13
Classification: C03C,Y10T

Abstract:
1. A glass article using a glass composition consisting essentially of: a base glass composition; and colorants, wherein the base glass composition consists essentially of, expressed in mass %: 65 to 80% of SiO 0 to 5% of Al 0 to 10% of MgO; 5 to 15% of CaO; 5 to 15% of MgO+CaO; 10 to 18% of Na 0 to 5% of K 10 to 20% of Na 0 to 5% of B the colorants consist essentially of, expressed in mass %: at least 0.70% to less than 0.95% of T-Fe 0.026 to 0.8% of TiO 0.10 to 2.0% of CeO 0.01 to 0.03% of CoO; and 0.06 to 0.20% of NiO, the glass article is heat tempered, the glass article has a grayish color tone, and has a visible light transmittance in a range of 15% to 40%, which is measured with the illuminant A at a thickness of 3.1 mm for the glass article, and the glass article has a color expressed as −5 ≦a*≦0 and −1 ≦b*≦4 in the CIE-LAB color system, which is measured with the illuminant C at a thickness of 3.1 mm for the glass article.