The measurement of glass density at high temperatures, carried out experimentally at SSV across the entire measurement range, is important for determining certain fundamental properties of the melt.
The density value is used in the calculation of the thermal conductivity of glass by convection, together with the convective flow velocity, the temperature gradient and the specific heat.

The density value is also used, together with the specific heat and the thermal diffusivity value obtained using the LaserFlash method, to calculate the thermal conductivity of the glass.

Finally, the measurement of density at high temperature provides the volumetric coefficient of thermal expansion of the molten glass and can be used to identify the temperature at which bubbles begin to form due to the saturation of gas solubility in the glass (reboil).