A Critical Examination of the Standard Test for the Chemical Durability of Glass

JSGT 1936 V20 T418-T427

A test for the durability of 4 oz medicine bottles was developed by the co-operation of six laboratories. It consists in determining the amount of alkali extracted from the inner surface of the bottle in five hours by boiling water. The test is examined in the light of information obtained by its continued use in a modified form, and the· possibility of its extension considered. The effects of glass composition, size and shape of container, conditions of manufacture, annealing and storage have been examined.

A. Cousen