Formation Of Glass Defects Originating In Raw Materials

Attention must be given to raw materials as potential sources of inhomogeneities in glass. High-melting raw materials that do not dissolve readily in the glass melt and the grain size of raw materials (silica sand, dolomite, limestone) play an important role during the batch melting process. In this article the author discusses these factors as well as wrong practices associated with the technology of batch preparation and glass melting in tank and pot furnaces.