Flash pan
Encyclopedia
The flash pan or priming pan is a small receptacle for priming powder, found next to the touch hole
Touch hole
A touch hole is a small hole, through which the propellant charge of a cannon or muzzleloading gun is ignited. In small arms, the flash from a charge of priming held in the flash pan is enough to ignite the charge within...

 on muzzleloading gun
Gun
A gun is a muzzle or breech-loaded projectile-firing weapon. There are various definitions depending on the nation and branch of service. A "gun" may be distinguished from other firearms in being a crew-served weapon such as a howitzer or mortar, as opposed to a small arm like a rifle or pistol,...

s. Flash pans are found on gonnes, matchlock
Matchlock
The matchlock was the first mechanism, or "lock" invented to facilitate the firing of a hand-held firearm. This design removed the need to lower by hand a lit match into the weapon's flash pan and made it possible to have both hands free to keep a firm grip on the weapon at the moment of firing,...

s, wheellock
Wheellock
A wheellock, wheel-lock or wheel lock, is a friction-wheel mechanism to cause a spark for firing a firearm. It was the next major development in firearms technology after the matchlock and the first self-igniting firearm. The mechanism is so-called because it uses a rotating steel wheel to provide...

s, snaplock
Snaplock
A Snaplock is a particular type of mechanism for firing a gun .A snaplock ignites the weapon's propellant by means of sparks produced when a spring-powered cock strikes a flint down on to a piece of hardened steel...

s, snaphance
Snaphance
A Snaphance or Snaphaunce is a particular type of mechanism for firing a gun . The name is Dutch in origin but the mechanism can not be attributed to the Netherlands with certainty. It is the mechanical progression of the wheel-lock firing mechanism and the predecessor of the flintlock firing...

s, and flintlock
Flintlock
Flintlock is the general term for any firearm based on the flintlock mechanism. The term may also apply to the mechanism itself. Introduced at the beginning of the 17th century, the flintlock rapidly replaced earlier firearm-ignition technologies, such as the doglock, matchlock and wheellock...

s.

The flash pan was at first attached to the gun barrel
Gun barrel
A gun barrel is the tube, usually metal, through which a controlled explosion or rapid expansion of gases are released in order to propel a projectile out of the end at a high velocity....

, but was later moved to the lock plate of the gun. A small amount of finely ground gunpowder
Gunpowder
Gunpowder, also known since in the late 19th century as black powder, was the first chemical explosive and the only one known until the mid 1800s. It is a mixture of sulfur, charcoal, and potassium nitrate - with the sulfur and charcoal acting as fuels, while the saltpeter works as an oxidizer...

 is placed in the flash pan and ignited. The flash of flame travels through the touch hole
Touch hole
A touch hole is a small hole, through which the propellant charge of a cannon or muzzleloading gun is ignited. In small arms, the flash from a charge of priming held in the flash pan is enough to ignite the charge within...

igniting the main charge of propellant inside the barrel. Unlike cannon, it was not necessary (or desirable) to place priming in the touch hole itself. The flash alone, and not particles of burning powder was enough to ignite the main charge.

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