ULTRAVIOLET-RAYS TRANSMITTING GLASS

摘要

The process of manufacturing the glass includes the steps of; (a) mixing raw material having ferric oxide with a mixture of 30-50 wt% aluminium and 50-70 wt% zinc powder; (b) reducting ferric oxide into ferrous oxide by melting at 1430-1480 deg.C for 30-40 min. in a melting pot preheated at 900-1100 deg.C; (c) moulding into glass tube.