White glass / borosilicate glasses with special UV edge

Borosilicate glass with a composition (in wt.% Based on oxide) of SiO 60-75 B 10-15 Na 5-15 K 5-10 CaO 0.1-1 BaO 0.5-3 TiO > 0 to 1.7 Sb 0-0.5 and conventional fining agents.