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1868 advertisement in a mining newspaper for the California Powder Works California Powder Works was the first American explosive powder manufacturing company west of the Rocky Mountains . When the outbreak of the Civil War cut off supplies of gunpowder to California 's mining and road-building industries, a local manufacturer was needed.
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The Trojan Powder Company was an American manufacturer of explosives founded in 1904 that made nitro-starch powder. It had a manufacturing complex in Allentown, Pennsylvania, and another facility at Roberts Landing near San Lorenzo, California.
Tertiary explosives, also called blasting agents, are so insensitive to shock that they cannot be reliably detonated by practical quantities of primary explosive, and instead require an intermediate explosive booster of secondary explosive. These are often used for safety and the typically lower costs of material and handling.
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A contact explosive is a chemical substance that explodes violently when it is exposed to a relatively small amount of energy (e.g. friction, pressure, sound, light). Though different contact explosives have varying amounts of energy sensitivity , they are all much more sensitive relative to other kinds of explosives.
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An explosive weapon generally uses high explosive to project blast and often fragmentation from a point of detonation. Explosive weapons may be subdivided by their method of manufacture into explosive ordnance and improvised explosive devices . When explosive weapons fail to function as designed they are often left as unexploded ordnance.