Both during the production cycle, during transport or during service life, glass articles are repeatedly subjected to impacts with each other or with other objects, so the resistance to this type of impulsive stress is of crucial importance to define the level of performance and safety.

The mechanical test is carried out according to the UNI 9302:1988 standard. Unlike the internal pressure test, the determination of impact resistance can also be carried out on wide-mouth items such as vases and jars, as well as on glasses and pitchers.