| Application Number: | 200480025956.1 | Application date: | 2004.08.11 |
| name: | Low light transmittance glass | ||
| Public (announcement) number: | CN1849272 | Public (announcement) day: | 2006.10.18 |
| Main classification number: | C03C3/087(2006.01)I | The original application number of the division: | |
| Classification number: | C03C3/087(2006.01)I; C03C4/02(2006.01)I | ||
| Award day: | priority: | 2003.8.13 BE 2003/0446 | |
| Application (patent) person: | Gravo Bell | ||
| address: | Brussels, Belgium | ||
| Invention (design) person: | L. Delmert; V. Diou; M. Van Dennist | International application: | 2004-08-11 PCT/EP2004/051774 |
| International announcement: | 2005-02-24 WO2005/016840 Method | Enter country date: | 2006.03.09 |
| Patent agency: | China Council for the Promotion of International Trade Patent and Trademark Office | agent: | Cai Shengyou |
The glass according to the present invention has a composition of the soda-calcium type to which a coloring component is added in the following weight ratio: Fe2O3: 1.1-1.5% (total amount of iron in the composition), Co: 150-200 ppm, Cr2O3: 325 -100 ppm, Se: 10-50 ppm, MnO: less than 600 ppm, TiO2: less than 0.1%. The composition of the composition, especially the proportion of the coloring component, is selected such that the light transmittance TLA4 at a thickness of 4 mm is less than 20% and the energy transmittance TE4 (moon) is less than 20%.
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