Claims
- 1. A colored glass composition, comprising the following oxides within the following limits by weight:
- ______________________________________ SiO.sub.2 64 to 75% Al.sub.2 O.sub.3 0 to 5% B.sub.2 O.sub.3 0 to 5% CaO 5 to 15% MgO 0 to 5% Na.sub.2 O 10 to 18% K.sub.2 O 0 to 5%______________________________________
- and as coloring agents:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) 0.45 to 2.5% with FeO content representing from 16 to 55%______________________________________
- of the total iron content expressed in the form of Fe.sub.2 O.sub.3
- ______________________________________ CoO 0.001 to 0.02% Se 0 to 0.0009%______________________________________
- wherein the glasses have a total energy transmission factor (T.sub.E) less than the light transmission factor under illuminant A (TL.sub.A), the factor T.sub.E being from 10 to 48% and the factor TL.sub.A from 20 to 60% for a thickness of 3.85 mm, said colored glass composition having an excitation purity equal to or less than 7.6%.
- 2. The composition according to claim 1, wherein the FeO content represents from 20 to 40% of the total iron expressed in the form of Fe.sub.2 O.sub.3.
- 3. The composition according to claim 1, wherein said coloring agents are:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) 0.45 to 1% CoO 0.001 to 0.01% Se 0.0002 to 0.0009%.______________________________________
- 4. The composition according to claim 1, wherein said coloring agents are:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) 1 to 1.8% CoO 0.005 to 0.02% Se 0.0005 to 0.0009%.______________________________________
- 5. The composition according to claim 1, wherein said coloring agents are:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) 0.8 to 1.8% CoO 0.001 to 0.01%.______________________________________
- 6. The composition according to claim 1, wherein said coloring agents are:
- ______________________________________Fe.sub.2 O.sub.3 (total iron) 1.3 to 2.5% CoO 0.005 to 0.015%.______________________________________
- 7. The composition according to claim 1, wherein said CoO is used in an amount of 0.001 to 0.0099%.
- 8. A glazing pane comprising a colored glass sheet, wherein the colored glass sheet has a composition as claimed in claim 1 and has a thickness of from 2 to 8 mm.
- 9. A glazing set mounted on an automobile vehicle, comprising a windscreen, front side windows and rear side windows and a rear window, wherein the rear side windows, both movable and fixed, and the rear window comprise panes as claimed in claim 8.
- 10. The glazing set according to claim 9, wherein the rear side windows and the rear window comprise, respectively, panes which, for a given thickness, have different total light transmission factors under illuminant A.
- 11. The glazing set according to claim 9, wherein the panes forming the rear side windows have, for a thickness of 3.85 mm, a total transmission factor under illuminant A of from 30 to 60%, and the pane forming the rear window has, for the same thickness, a total transmission factor under illuminant A of from 20 to 45%.
Priority Claims (1)
Number |
Date |
Country |
Kind |
91 12164 |
Oct 1991 |
FRX |
|
Parent Case Info
This is a Division of application Ser. No. 07/969,836 filed on Aug. 5, 1993, now abandoned; which was filed as International Application No. PCT/FR92/00913, on Oct. 2, 1992.
US Referenced Citations (17)
Foreign Referenced Citations (6)
Number |
Date |
Country |
0482535 |
Apr 1992 |
EPX |
2074983 |
Oct 1971 |
FRX |
57-106537 |
Jul 1982 |
JPX |
1168769 |
Sep 1966 |
GBX |
1331492 |
Sep 1973 |
GBX |
2162835 |
Feb 1986 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
969836 |
|
|