The determination of the devitrification curve of a given glass allows to evaluate its degree of instability and to identify the critical temperatures for the nucleation and growth of crystals, so it is crucial, for example, in the field of glass ceramics, or in case of crisis of defects in the finished products.

The test is carried out with the help of a specially calibrated gradient furnace, and the evaluation method has been optimized internally by SSV following the indications of the ISO standard of reference. The test can also be integrated with an XRD mineralogical analysis, aimed at identifying any crystalline nucelated phases.