Assertion: electric blasting cap | /r/MadeOf | casing
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text: As is well known, electric blasting caps consist of a casing in which may be confined at the bottom a detonating charge, for example, tetryl, TNT, nitrostarch, or the like, and has superimposed upon this base a priming charge, for example, diazodinitrophenol, mercury fulminate, lead azide, or mixtures thereof with oxidizing agents such as potassium chlorate.