<P> Dynamite is usually rated by "weight strength" (the amount of nitroglycerin it contains), usually from 20% to 60% . For example, 40% dynamite is composed of 40% nitroglycerin and 60% "dope" (the absorbent storage medium mixed with the stabilizer and any additives). </P> <P> The maximum shelf life of nitroglycerin - based dynamite is recommended as one year from the date of manufacture under good storage conditions . </P> <P> Over time, regardless of the sorbent used, sticks of dynamite will "weep" or "sweat" nitroglycerin, which can then pool in the bottom of the box or storage area . For that reason, explosive manuals recommend the repeated turning over of boxes of dynamite in storage . Crystals will form on the outside of the sticks causing them to be even more shock, friction, and temperature sensitive . This creates a very dangerous situation . While the risk of an explosion without the use of a blasting cap is minimal for fresh dynamite, old dynamite is dangerous . Modern packaging helps eliminate this by placing the dynamite into sealed plastic bags, and using wax coated cardboard . </P> <P> Dynamite is moderately sensitive to shock . Shock resistance tests are usually carried out with a drop - hammer: about 100 mg of explosive is placed on an anvil, upon which a weight of between 0.5 and 10 kg is dropped from different heights until detonation is achieved . With a hammer of 2 kg, mercury fulminate detonates with a drop distance of 1 to 2 cm, nitroglycerin with 4 to 5 cm, dynamite with 15 to 30 cm, and ammoniacal explosives with 40 to 50 cm . </P>

What impact did dynamite have on other industries