Editing Smoke grenade (section)

== Design ==
[[file:M18 Grenade.svg|thumb|left|Diagram and cross section of an [[M18 smoke grenade]]]]

A typical design consists of a sheet [[steel]] cylinder with four emission holes on top and one on the bottom to allow smoke release when the grenade is ignited. The filler consists of 250 to 350&nbsp;grams of [[colored smoke|colored]] [[smoke composition]] (mostly [[potassium chlorate]], [[lactose]], and a [[dye]]) in virtually any color. White smoke grenades typically use [[hexachloroethane]]-zinc and granular aluminum. The reaction is [[exothermic]] and though they remain intact, smoke grenade casings will often remain scalding hot for some time even after the grenade is no longer emitting smoke. Although modern smoke grenades are designed not to directly emit fire or sparks, they remain a [[fire hazard]] and are capable of igniting dry vegetation or flammable substances if used carelessly.

Another type of smoke grenade is the bursting variation. These are filled with [[White phosphorus incendiary|white phosphorus]] (WP), a [[pyrophoric]] agent that is spread quickly into a cloud by an internal bursting charge. White phosphorus burns with a brilliant yellow flame while producing copious amounts of white smoke ([[phosphorus pentoxide]]). This type of smoke grenade is favored for its ability to produce a very dense and nearly instantaneous cloud of white concealment smoke as compared to the more common solid-filler grenades which expel a slower stream of smoke over a period of roughly 1 minute. For this reason, they are favored for use in onboard grenade launching attachments on [[armored vehicles]], which require extremely fast concealment in the event they are targeted by anti-armor weaponry and need to rapidly retreat.