The specific conductivity of melts in the K2O-PbO-SiO2 system was meas
ured as a function of temperature and composition within their glass f
orming regions Because conductivity is very sensitive to composition c
hanges it can be considered as an appropriate method for choosing a go
od quality, stable glass. Leaching tests were also performed on the st
udied glasses in order to establish the limiting conductivities of the
melts.