The Influence of Ferric Oxide Content on the Light Transmission of Soda-Lime-Silica Glass, with Special reference to the Ultra-Violet

JSGT_1928_V12_T324_T332

Iron oxide is at once a valuable ally and a most stubborn enemy to the glass-maker; the former when a variety of glass colorations are desired, the latter whenever colourless glass is to be made. It pervades nearly all the raw materials and accessories of glass-making: sand, limestone, and other materials; the clay vessel or furnace in which the glass is melted; the furnace atmosphere, and, lastly, the majority of the tools by which glass is manipulated. We have already made some study of the general effect of iron oxide on the rate of melting and on the physical properties of glass and coupled with the investigation of G. Gehlhoff & M. Thomas, we are now on the way to a better understanding of the general functions of iron oxide when present in substantial amount in glass.

D. Starkie & W. E. S. Turner