Strength of dynamite

Since none of the above listed "antifreezes was really good, many. industrialists preferred not to use them at all, but just defrost the ordinary Dynamite in winter or store it in a warm magazine. This situation lasted until 1902 when a severe exp In in Greisenau Mine, Germany, was caused by frozen Dynamite. This disaster produced the renewal of research on antifreezes and in 1903 the SA de Poudres et Dynamites of France introduced DNT TNT as antifreezes. These compds did not reduce appreciably the strength of Dynamites and were satisfactory from this point of view. They, however, did not lower the ft p of NG sufficiently for use in very cold weather... 

In Guhrdynamite and in other Dynamites with inactive bases (dopes), the strength, of NG is reduced, because these dopes do not take part in detonation. If, however, inert substances are replaced by materials which might contribute to the force of detonation, the strength of Dynamites increases. These substances, known as "active bases or "active dopes , might include combustibles and their combinations, with Na nitrate. 

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