Colored glass, processes for their preparation and use

Colored glass comprising the following composition (in wt .-% based on oxide): P 25 - 62 Al 0.5 - 15 MgO 0 - 10 CaO 0 - 10 BaO 0 - 35 SrO 0 - 16 Li 0 - 12 Na 0 - 12 K 0 - 12 CuO > 7 - 20 F / F 1 - 20 Total RO (R = Mg, Ca, Sr, Ba) 0.1 - 40 Sum of R 0.5 - 20