DIN ISO 7884-7:1998-02

The document specifies the method of determination the annealing point and the strain point of a glass by beam bending. These values have been found useful for specifying the cooling programme in the production of glassware. The annealing point and the strain point include a well-defined temperature descrease during the measurement. This method is applicable to all glases of normal bulk-production compositions, unless the preparation of suitable test specimens is hindered by special reasons. This method is particularly suited for glasses that for one reason or another are not adoptable for flame-working.