Soda-lime glass of blue hue
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United States of America Patent
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Apr 25, 2006
Grant Date -
Aug 12, 2004
app pub date -
Feb 5, 2004
filing date -
Dec 22, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a coloured soda-lime glass of blue hue, containing more than 2 wt. % of MgO, more than 1.1 wt. % of Fe2O3, less than 0.53 wt. % of FeO and less than 0.13 wt. % of MnO2, and presenting under Illuminant A and for a glass thickness of 4 mm, a transmission factor (TLA4) higher than 15%, a selectivity (SE4) higher than 1.2 and a dominant wavelength (λD) and a purity of excitation (P) such that they are located in the CIE chromaticity co-ordinate diagram inside a triangle whereof the apices are defined by the point representing the illuminant source C and the points whereof the co-ordinates (λD, P) are (490,19) and (476,49) respectively. Said glass is particularly suitable for motor vehicle side windows, rear windows and sun roof.
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