| abstract |
A dark grey soda-lime glass contains iron, cobalt, selenium and chromium as colouring agents in the following proportions (expressed in the form indicated as percentages by weight of the glass): Fe 2 O 3 0.75 to 1.80%, Co 0.0040 to 0.0180%, Se 0.0003 to 0.0040% and Cr 2 O 3 0.0010 to 0.0100%. The glass has a total energy transmission, measured for a glass thickness of 4 mm (TE4), of between 15 and 40%, a high selectivity (SE4) of at least 1.2 and a low excitation purity, not exceeding 10%. This glass is particularly suitable for automobile rear windows or rear side windows. |