Clear gray soda

A coloured soda-lime glass with a clear grey tint, and with a shade varying between greenish and bluish contains the elements iron, cobalt and selenium as colouring agents, in the weight proportions: Fe 2 O 3 0.25 to 0.60%, Co 0.0010 to 0.0040% and Se 0.0005 to 0.0030%. The glass is characterised by an excitation purity of less than 6% and a selectivity of more than 1.1. This glass is particularly suitable for automobile windscreens and front side windows.