Mercury fulminate drop test

The rate of detonation of a thin film of lead azide (0.1-0.5 mm thick) is 2100 m/sec (Bowden and Williams [101]). Lead azide is less sensitive to impact than mercury fulminate, but drop test figures quoted by various authors differ widely. Some of them report a negligible difference between the two, while others state it is considerable (e.g. that azide requires 2-3 times the height of drop necessary to explode fulminate). On the other hand, when mixed with pulverized sand lead azide is more... 

Butyl tetryl is suitable for use in boosters, reinforced detonators, detonating fuse, primer caps, etc. For the detonation of 0.4 gram, it requires 0.19 gram of mercury fulminate. It has a slightly greater shattering effect than TNT in the sand test and shows about the same sensitivity as tetryl in the drop test. It explodes spontaneously at 210°. 

Cyanuric triazide is slightly more hygroscopic and distinctly more sensitive in the drop test than fulminate of mercury.44 It is slightly volatile, and must be dried at as low a temperature as possible, preferably in vacuum.44 Detonators in which it is used... 

Hexamethylenetriperoxidediamine is almost insoluble in water and in the common organic solvents at room temperature. It detonates when struck a sharp blow, but, when ignited, bums with a flash like nitrocellulose. Taylor and Rinkenbach 63 found its true density (20°/20°) to be 1.57, its apparent density after being placed in a tube and tapped 0.66, and its density after being compressed in a detonator capsule under a pressure of 2500 pounds per square inch only 0.91. They found that it required a 3-cm. drop of a 2-kilogram weight to make it explode, but that fulminate required a drop of only 0.25 cm. In the sand test it pulverized 21/ to 3 times as much sand as mercury fulminate, and slightly more sand than lead azide. It is not dead-pressed by a pressure of 11,000 pounds per square inch. It is considerably... 

The impact sensitivity should be performed on one of the customary impact testers, using again milligram quantities of the material. Bureau of Mines values of 20 or less, or Ball Drop values of the order of 100 cm or less, or PicArsn Impact Test values of 15 cm or less, all indicate that the expl be treated as a primary expl, in the class of Pb Azide or Mercury Fulminate. Such substances should be stored wet in... 

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