:''For other meanings, see gunpowder (disambiguation).''
Gunpowder, also known since the late 19th century as black powder, is a mixture of sulphur, charcoal, and potassium nitrate (saltpeter). Gunpowder can be made just using potassium nitrate and charcoal, but without the sulfur, the powder is not as strong. The sulfur also makes the powder easier to ignite and lowers the temperature of the burning gun powder. Because of this gun barrels would not wear as quickly, however the sulfur formed corrosive compounds on firing. For this reason guns using it required extra care when cleaning. It burns rapidly, producing a volume of hot gas made up of carbon dioxide, water, and nitrogen, and a solid residue of potassium sulfide. Because of its burning properties and the amount of heat and gas volume that it generates, gunpowder has been widely used as a propellant in firearms and as a pyrotechnic composition in fireworks. The term ''gunpowder'' also refers broadly to any propellant powder. Modern firearms do not use the traditional gunpowder (black powder) described in this article, but instead use smokeless powder. Antique firearms or replicas of antique firearms are often used with black powder substitute. Such substitutes are typically more stable, less corrosive, and easier to clean after firing.
Gunpowder is classified as a low explosive because of its relatively slow decomposition rate and consequently low brisance. Low explosives deflagrate at subsonic speeds. High explosives detonate, producing a supersonic wave. Ignition of the powder packed behind a bullet must generate enough pressure to force it from the muzzle at high speed, but not enough to rupture the gun barrel. Gunpowder is thus less suitable for shattering rock or fortifications, where high explosives such as TNT are preferred.
Gunpowder was, according to prevailing academic consensus, discovered in the 9th century by Chinese alchemists searching for an elixir of immortality. This discovery led to the invention of fireworks and the earliest gunpowder weapons in China. In the centuries following the Chinese discovery, gunpowder weapons began appearing in the Arab world, Europe, and India. The consensus is that this was spread from China, through the Middle East, and then into Europe, although there remains some dispute over the amount of Chinese influence on later advancements in gunpowder technology.
Characteristics
The term ''black powder'' was coined in the late 19th century, primarily in America, to distinguish prior gunpowder formulations from the new
smokeless powders and semi-smokeless powders, in cases where these are not referred to more accurately as
cordite. Semi-smokeless powders featured bulk volume properties that approximated black powder in terms of chamber pressure when used in firearms, but had significantly reduced amounts of smoke and combustion products; they ranged in color from brownish tan to yellow to white. Most of the bulk semi-smokeless powders ceased to be manufactured in the 1920s.
Black powder is a granular mixture of
a nitrate, typically potassium nitrate (KNO3), which supplies oxygen for the reaction;
charcoal, which provides carbon and other fuel for the reaction, simplified as carbon (C);
sulfur (S), which, while also serving as a fuel, lowers the temperature required to ignite the mixture, thereby increasing the rate of combustion.
Potassium nitrate is the most important ingredient in terms of both bulk and function because the combustion process releases oxygen from the potassium nitrate, promoting the rapid burning of the other ingredients. To reduce the likelihood of accidental ignition by
static electricity, the granules of modern black powder are typically coated with
graphite, which prevents the build-up of electrostatic charge.
Charcoal does not consist of pure carbon; rather, it consists of partially pyrolyzed cellulose, in which the wood is not completely decomposed.
The current standard composition for the black powders that are manufactured by pyrotechnicians was adopted as long ago as 1780. Proportions by weight are 75% potassium nitrate (known as saltpeter or saltpetre), 15% softwood charcoal, and 10% sulfur. These ratios have varied over the centuries and by country, and can be altered somewhat depending on the purpose of the powder. For instance, power grades of black powder, unsuitable for use in firearms but adequate for blasting rock in quarrying operations, is called blasting powder rather than gunpowder with standard proportions of 70% nitrate, 14% charcoal, and 16% sulfur; blasting powder may be made with the cheaper sodium nitrate substituted for potassium nitrate and proportions may be as low as 40% nitrate, 30% charcoal, and 30% sulfur. French war powder in 1879 used the ratio 75% Saltpetre, 12.5% Charcoal, 12.5% Sulfur. English war powder in 1879 used the ratio 75% Saltpetre, 15% Charcoal, 10% Sulfur.
Corning
Corning is a process in which black powder is compressed into cakes, crushed, and then screened into different size categories. This process improves gunpowder's reliability by making its burn rate more consistent and inhibiting the separation of its constitutive components.
Corning first compresses the fine black powder meal into blocks with a fixed density (1.7 g/cm³). The blocks are then broken up into granules. These granules are then sorted by size to give the various grades of black powder. In the United States, standard grades of black powder run from the coarse Fg grade used in large bore rifles and small cannon, through FFg (medium and smallbore arms such as muskets and fusils), FFFg (smallbore rifles and pistols), and FFFFg (extreme small bore, short pistols and most commonly for priming flintlocks). In the United Kingdom, the gunpowder grains are categorised by mesh size: the BSS sieve mesh size, being the smallest mesh size on which no grains were retained. Recognised grain sizes are Gunpowder G 7, G 20, G 40, and G 90.
Combustion characteristics
A simple, commonly cited,
chemical equation for the combustion of black powder is
:2
KNO3 +
S + 3
C →
K2S +
N2 + 3
CO2.
A more accurate, but still simplified, equation is
:10 KNO3 + 3 S + 8 C → 2 K2CO3 + 3 K2SO4 + 6 CO2 + 5 N2.
It is important to note however, that Carbon differs from Charcoal. Whereas charcoal's autoignition temperature is relatively low, carbon's is much greater. Thus, a black powder composition containing pure carbon would essentially burn in comparison to a match head, at best.
Although charcoal's chemical formula varies, it can be best summed up by its empirical formula: C7H4O
An even more accurate equation of the decomposition of regular black powder with the use of sulfur can be described as:
: 4 KNO3 + C7H4O + 2 S —> 2 K2S + 4 CO2 + 3 CO + 2 H2O + 2 N2
Black powder without the use of sulfur:
: 6 KNO3 + C7H4O —> 3 K2CO3 + CO2 + 6 CO + 2 H2O + 2 N2
The burning of gunpowder does not take place as a single reaction, however, and the byproducts are not easily predicted. One study's results showed that it produced (in order of descending quantities): 55.91% solid products: potassium carbonate, potassium sulfate, potassium sulfide, sulfur, potassium nitrate, potassium thiocyanate, carbon, ammonium carbonate. 42.98% gaseous products: carbon dioxide, nitrogen, carbon monoxide, hydrogen sulfide, hydrogen, methane, 1.11% water.
Black powder made with sodium nitrate tends to be hygroscopic, unlike black powders made from saltpeter. (In this article, "saltpeter"--also spelled "saltpetre"--means potassium nitrate and not any of the other nitrates that are also sometimes called "saltpeter.") Because black powder made with saltpeter is less affected by moisture in the air, it can be stored unsealed for centuries without degradation if it is kept dry. Muzzleloaders have been known to fire after hanging on a wall for decades in a loaded state, provided they remained dry. By contrast, black powder made with sodium nitrate must be sealed from the moisture in the air to remain stable for long periods.
Advantages
In quarrying, high explosives are generally preferred for shattering rock. However, because of its low
brisance, black powder causes fewer fractures and results in more usable stone compared to other explosives, making black powder useful for blasting monumental stone such as
granite and
marble.
Black powder is well suited for blank rounds, signal flares, burst charges, and rescue-line launches. Black powder is also used in fireworks for lifting shells, in rockets as fuel, and in certain special effects.
Disadvantages
Black powder has a low
energy density compared to modern "smokeless" powders, and thus to achieve high energy loadings, large amounts of black powder are needed with heavy projectiles. In military applications black powder also produces thick smoke as a byproduct, which may give a soldier's location away to an enemy observer. The smoke may also impair aiming for additional shots.
Combustion converts less than half the mass of black powder to gas. The rest ends up as a thick layer of soot inside the barrel. In addition to being a nuisance, the residue from burnt black powder is hygroscopic and with the addition of moisture absorbed from the air, this residue forms a caustic substance. The soot contains potassium oxide or sodium oxide that turns into potassium hydroxide, or sodium hydroxide, which will corrode wrought iron or steel gun barrels. Black powder arms must be well cleaned both inside and out to remove the residue. The Matchlock musket or pistol (an early gun ignition system), as well as the flintlock would often be unusable in wet weather, due to powder in the pan being exposed and dampened. Because of this unreliability, soldiers carrying muskets, known as musketeers, were armed with additional weapons such as swords or pikes. The bayonet was developed to allow the musket to be used as a spear, thus eliminating the need for the soldier to carry a secondary weapon.
Transportation
The
UN Model Regulations on the Transportation of
Dangerous Goods and national transportation authorities, such as
United States Department of Transportation, have classified Gunpowder (black powder) as a ''Group A: Primary explosive substance'' for shipment because it ignites so easily. Complete manufactured devices containing black powder are usually classified as ''Group D: Secondary detonating substance, or black powder, or article containing secondary detonating substance'', such as firework, class D
model rocket engine, etc., for shipment because they are harder to ignite than loose powder. As explosives, they all fall into the category of Class 1.
Energy content
Gunpowder contains 3
megajoules per
kilogram, and contains its own oxidant. For comparison, the energy density of
TNT is 4.7 megajoules per kilogram, and the energy density of
gasoline is 47.2 megajoules per kilogram.
Sulfur-free gunpowder
The development of
smokeless powders, such as
Cordite, in the late 19th century created the need for a spark-sensitive
priming charge, such as gunpowder. However, the sulfur content of traditional gunpowders caused
corrosion problems with Cordite Mk I and this led to the introduction of a range of sulfur-free gunpowders, of varying grain sizes. They typically contain 70.5 parts of saltpetre and 29.5 parts of charcoal. Like black powder, they were produced in different grain sizes. In United Kingdom, the finest grain was known as ''sulfur-free mealed powder'' (''SMP''). Coarser grains were numbered as sulfur-free gunpowder (SFG n): 'SFG 12', 'SFG 20', 'SFG 40' and 'SFG 90', for example; where the number represents the smallest BSS
sieve mesh size on which no grains were retained.
The main purpose of sulfur in gunpowder is to decrease the ignition temperature. A sample reaction for sulfur-free gunpowder would be
: 4 KNO3 + C7H8O → 3 K2CO3 + 4 CO2 + 2 H2O + 3 N2
History
Gunpowder was invented, documented, and used in
China where the Chinese military forces used gunpowder-based weapons technology (i.e.
rockets,
guns, cannon), and
explosives (i.e.
grenades and different types of
bombs) against the
Mongols when the Mongols attempted to invade and breach the Chinese city fortifications on the northern borders of China. After the Mongols conquered China and founded the Yuan Dynasty, they used the Chinese gunpowder-based weapons technology in their invasion of Japan. Chinese also used gunpowder to fuel
rockets.
The mainstream scholarly consensus is that gunpowder was invented in China, spread through the Middle East, and then into Europe,
A major problem for academic study is ready access to original sources. Moreover, it is difficult to accurately translate original sources, especially medieval Chinese texts which employ metaphor to describe unexplained phenomena, into contemporary scientific language with its rigidly defined terminology. The difficulty in translation gives rise to errors or loose interpretation bordering on artistic licence.
China
Saltpeter was known to the Chinese by the mid-1st century AD and there is strong evidence of the use of
saltpeter and
sulfur in various largely
medicinal combinations. A Chinese alchemical text dated 492 AD noted saltpetre burnt with a purple flame, providing a practical and reliable means of distinguishing it from other inorganic salts, thus enabling alchemists to evaluate and compare purification techniques. The Chinese word for "gunpowder" is , which literally means "Fire Medicine", meaning "Fire Chemicals" or "Fire Powder".
The first reference of gunpowder is possibly the passage of the ''Zhenyuan miaodao yaolüe'', a Taoist text tentatively dated to the mid-9th century AD:
Some have heated together sulfur, realgar and saltpeter with honey; smoke and flames result, so that their hands and faces have been burnt, and even the whole house where they were working burned down.
By the 9th century
Taoist monks or
alchemists searching for an
elixir of immortality had serendipitously stumbled upon gunpowder.
The Chinese "Wu Ching Tsung Yao", written by Tseng Kung-Liang in 1044, provides encyclopedia references to a variety of mixtures which included petrochemicals, as well as garlic and honey. A slow match for flame throwing mechanisms using the siphon principle and for fireworks and rockets are mentioned. Academics argue the Chinese wasted little time in applying gunpowder to warfare, and they produced a variety of gunpowder weapons, including flamethrowers, rockets, bombs, and land mines, before inventing guns as a projectile weapon.
Middle East
The
Arabs acquired knowledge of gunpowder some time after 1240 AD, but before 1280 AD, by which time Hasan al-Rammah had written, in Arabic, recipes for gunpowder, instructions for the purification of saltpeter, and descriptions of gunpowder incendiaries. Gunpowder arrived in the Middle East, possibly through India, but originating in China. This is implied by al-Rammah's usage of "terms that suggested he derived his knowledge from Chinese sources" and his references to saltpeter as "Chinese snow", fireworks as "Chinese flowers" and rockets as "Chinese arrows". However, because al-Rammah attributes his material to "his father and forefathers",
al-Hassan argues that gunpowder became prevalent in Syria and Egypt by "the end of the twelfth century or the beginning of the thirteenth".
Al-Hassan claims that in the Battle of Ain Jalut of 1260 AD, the Mamluks used against the Mongols in "the first cannon in history" gunpowder formula with near-identical ideal composition ratios for explosive gunpowder. However, Khan claims that it was invading Mongols who introduced gunpowder to the Islamic world and cites Mamluk antagonism towards early musketeers in their infantry as an example of how gunpowder weapons were not always met with open acceptance in the Middle East. Similarly, the refusal of their Qizilbash forces to use firearms contributed to the Safavid rout at Chaldiran in 1514.
The earliest surviving documentary evidence for the use of the hand cannon, considered the oldest type of portable firearm and a forerunner of the handgun, are from several Arabic manuscripts dated to the 14th century. Al-Hassan argues that these are based on earlier originals and that they report hand-held cannons being used by the Mamluks at the Battle of Ain Jalut in 1260.
Hasan al-Rammah included 107 gunpowder recipes in his text ''al-Furusiyyah wa al-Manasib al-Harbiyya'' (''The Book of Military Horsemanship and Ingenious War Devices''), 22 of which are for rockets. If one takes the median of 17 of these 22 compositions for rockets (75% nitrates, 9.06% sulfur, and 15.94% carbon), it is near identical with the modern reported ideal gunpowder recipe of 75% potassium nitrate, 10% sulfur, and 15% carbon, although this was already known to Roger Bacon
Mainland Europe
Several sources mention Chinese firearms and gunpowder weapons being deployed by the Mongols against European forces at the
Battle of Mohi in 1241. Professor Kenneth Warren Chase credits the Mongols for introducing into Europe gunpowder and its associated weaponry.
C. F. Temler interprets Peter, Bishop of Leon, as reporting the use of cannon in Seville in 1248 AD.
In Norwegian the ''Konungs skuggsjá'' of 1250 AD mentions in its military chapter, the use of two key ingredients: "coal and sulfur" as the best weapons for ship-to-ship combat.
Dated around 1257 AD, among the earliest extant written references to gunpowder in Europe, are Roger Bacon's texts ''Epistola'', "''De Secretis Operibus Artis et Naturae et de Nullitate Magiae''," dated variously between 1248 and 1257, he states:
We can, with saltpeter and other substances, compose artificially a fire that can be launched over long distances... By only using a very small quantity of this material much light can be created accompanied by a horrible fracas. It is possible with it to destroy a town or an army ... In order to produce this artificial lightning and thunder it is necessary to take saltpeter, sulfur, and Luru Vopo Vir Can Utriet.
The last part has been interpreted as an elaborate coded anagram for the quantities needed, but other academics holding contrary viewpoints argue this may be erroneous transcription of a passage read with much difficulty.
Some authors maintain that around 1261, Roger did develop the ideal formula for gunpowder (75% of saltpeter, 15% of carbon and 10% of sulfur)
In the ''Opus Maior'' of 1267 AD, Bacon describes firecrackers:
a child’s toy of sound and fire and explosion made in various parts of the world with powder of saltpetre, sulfur and charcoal of hazelwood.
The ''
Liber Ignium'', or ''Book of Fires'', attributed to Marcus Graecus, is a collection of incendiary recipes, including some gunpowder recipes. Partington dates the gunpowder recipes to approximately 1300. One recipe for "flying fire" (''ingis volatilis'') involves saltpetre, sulfur, and
colophonium, which, when inserted into a reed or hollow wood, "flies away suddenly and burns up everything." Another recipe, for artificial "thunder", specifies a mixture of one pound native sulfur, two pounds linden or willow charcoal, and six pounds of saltpeter. Another specifies a 1:3:9 ratio.
Some of the gunpowder recipes of ''De Mirabilibus Mundi'' of Albertus Magnus are identical to the recipes of the ''Liber Ignium'', and according to Partington, "may have been taken from that work, rather than conversely." Partington suggests that some of the book may have been compiled by Albert's students, "but since it is found in thirteenth century manuscripts, it may well be by Albert." Albertus Magnus died in 1280 AD.
A common German folk-tale is of the German priest/monk named Berthold Schwarz who independently invented gunpowder, thus earning it the German name ''Schwarzpulver'' or in English ''Schwarz's powder''. Schwarz is also German for black so this folk-tale, while likely containing elements of truth, is considered problematic.
The major and uniquely European advancement of gunpowder was corning: the addition of moisture to the gunpowder to form regular greater grains which much increased the reliability and consistency of gunpowder. This occurred around the late 15th century CE, as European powdermakers began adding moisture to gunpowder to reduce dust and with it the risk of dust explosion. The powdermakers would then shape the resulting mush of dampened gunpowder, known as mill cake, into corns, or grains, to dry.
The new "corned" powder remained potent and more reliable to store as it was far less hygroscopic than the former powder (due to net reduced surface area). Gunners also found it was more powerful and easier to load measures of it into guns. An advantage of corning is that the combustion flame spreads evenly between the grains, thus igniting all grains before significant gas expansion (when the gunpowder actually "explodes"). Gunpowder not corned results in much unburnt powder blown away from the ignition flame and combustion chamber due to localized miniature gas expansions within the powder.
Europeans innovated by experimentation and discovering different kernel sizes combusted at differing rates, and thus were more suitable for one gun or for another. Molerus notes that without corning, gunpowder, like all dry mixtures, has a tendency to gradually separate back to its components and thus was too unreliable for effective use in guns as mixtures would not be of uniform composition, noting the use of corning technique is commonplace in the modern pharmaceutical industry to ensure uniform proportions of active ingredients for each tablet.
Shot and gunpowder for military purposes were made by skilled military tradesmen, later called ''firemakers'', and were also required to craft fireworks for celebrations of victory or peace. During the Renaissance, two European schools of pyrotechnic thought emerged, one in Italy and the other at Nuremberg, Germany. The Italian school of pyrotechnics emphasized elaborate fireworks, and the German school stressed scientific advancement. Both schools added significantly to further development of pyrotechnics, and by the mid-17th century fireworks were used for entertainment on an unprecedented scale in Europe, being popular even at resorts and public gardens.
By 1788, as a result of the reforms for which Lavoisier was mainly responsible, France had become self-sufficient in saltpeter, and its gunpowder had become not only widely considered the best in Europe but more importantly, inexpensive.
The introduction of smokeless powder in the late 19th century led to the contraction of the gunpowder industry.
British Isles
Gunpowder production in Britain appears to have started in the mid 14th century AD with the aim of supplying
The English Crown. Records show that gunpowder was being made, in England, in 1346, at the
Tower of London; a powder house existed at the Tower in 1461; and in 1515 three King's gunpowder makers worked there. Gunpowder was also being made or stored at other Royal castles, such as
Portchester. By the early 14th century, according to N.J.G. Pounds's study ''The Medieval Castle in England and Wales,'' many
English castles had been deserted and others were crumbling. Their military significance faded except on the borders. Gunpowder had made smaller castles useless.
Henry VIII of England was short of gunpowder when he invaded France in 1544 AD and England needed to import gunpowder via the port of Antwerp.
The English Civil War, 1642-1645 AD, led to an expansion of the gunpowder industry, with the repeal of the Royal Patent in August 1641.
Two British physicists, Andrew Noble and Frederick Abel, worked to improve the properties of blackpowder during the late 19th century. This formed the basis for the Noble-Abel gas equation for internal ballistics.
The introduction of smokeless powder in the late 19th century led to a contraction of the gunpowder industry. After the end of World War I, the majority of the United Kingdom gunpowder manufacturers merged into a single company, "Explosives Trades limited"; and number of sites were closed down, including those in Ireland. This company became Nobel Industries Limited; and in 1926 became a founding member of Imperial Chemical Industries.
The Home Office removed gunpowder from its list of ''Permitted Explosives''; and shortly afterwards, on 31 December 1931, the former Curtis & Harvey's Glynneath gunpowder factory at Pontneddfechan, in Wales, closed down, and it was demolished by fire in 1932.
The last remaining gunpowder mill at the Royal Gunpowder Factory, Waltham Abbey was damaged by a German parachute mine in 1941 and it never reopened. This was followed by the closure of the gunpowder section at the Royal Ordnance Factory, ROF Chorley, the section was closed and demolished at the end of World War II; and ICI Nobel's Roslin gunpowder factory which closed in 1954.
This left the sole United Kingdom gunpowder factory at ICI Nobel's Ardeer site in Scotland; it too closed in October 1976. Since then gunpowder has been imported into the United Kingdom. In the late 1970s / early 1980s gunpowder was bought from eastern Europe, particularly from what was then the East Germany and former Yugoslavia.
India
Gunpowder had arrived in
India by the mid-14th century, perhaps introduced by the
Mongols as early as the mid-13th century.
It was written in the ''Tarikh-i Firishta'' (1606–1607) that the envoy of the Mongol ruler Hulegu Khan was presented with a dazzling pyrotechnics display upon his arrival in Delhi in 1258 CE. Firearms known as ''top-o-tufak'' also existed in the Vijayanagara Empire of India by as early as 1366 AD. From then on the employment of gunpowder warfare in India was prevalent, with events such as the siege of Belgaum in 1473 AD by Sultan Muhammad Shah Bahmani.
By the 16th century, Indians were manufacturing a diverse variety of firearms; large guns in particular, became visible in Tanjore, Dacca, Bijapur and Murshidabad. Guns made of bronze were recovered from Calicut (1504 AD) and Diu (1533 AD). Gujarāt supplied Europe saltpeter for use in gunpowder warfare during the 17th century. Bengal and Mālwa participated in saltpeter production. The Dutch, French, Portuguese, and English used Chāpra as a center of saltpeter refining.
War rockets, mines and counter mines using gunpowder were used in India by the time of Akbar and Jahangir. Both Hyder Ali and his son Tippu Sultan used black powder technology in iron-cased war rockets with considerable effect against the British, which inspired the development of the Congreve rocket.
Indonesia
The
Javanese Majapahit Empire is argued to have grown to span most of modern day
ASEAN due to its Javanese mastery of bronze-smithing and unique within the immediate region to the
Majapahit court, the technology and mass manufacture (via cottage industries which contributed to a central
arsenal). Documentary and archeological evidence indicate that
Arab or
Indian traders introduced gunpowder, gonnes,
muskets,
blunderbusses, and cannon to the
Javanese,
Acehnese, and
Batak via long established commercial
trade routes around the early to mid 14th century CE. Early European aggressors of Portugal and Spain were unpleasantly surprised and outgunned on many occasions.
The resurgent
Singhasari Empire overtook
Sriwijaya and later emerged as the
Majapahit who rigidly established fire-arms and cannonade as a feature of warfare.
Circa 1540 CE the Javanese always alert for new weapons found the newly arrived Portuguese weaponry superior to that of the locally made variants. The Javanese bronze breech-loaded swivel-gun, erroneously termed the lantaka, more correctly known as a meriam was used ubiquitously by the Majapahit navy and unfortunately pirates and rival lords. The demise of the Majapahit empire and the flight of disaffected skilled bronze cannon-smiths to Brunei, modern Sumatra and Malaysia, and the Philippines lead to near universal use of the swivel-gun, especially on trade vessels to protect against prevalent marauding pirates, especially in the Makassar Strait.
A Chinese pirate or commercial shipwreck site unearthed a double-ended swivel gun, which enabled swift firing: one barrel would fire whiles its opposite would be reloaded, though this is a rare and unique piece. Other archeological finds have unearthed some triple-barrel and some double-barrel swivel-guns, which were not widely duplicated.
The saltpetre harvesting was recorded by Dutch and German travelers as being common to even the smallest villages and collected from the decomposition process of large goat dung hills specifically piled for collection this saltpetre, a most unpleasant job. Saltpetre must be remembered by today's reader as being a key food preservative agent in a period of no refrigeration.
The Dutch punishment for possession of unpermitted gunpowder appears to have been amputation.
Ownership and manufacture of gunpowder was later prohibited by the colonial Dutch occupiers. but others such as alder or buckthorn can be used.
The ingredients are mixed as thoroughly as possible. This is achieved using a ball mill with non-sparking grinding apparatus (e.g., bronze or lead), or similar device. Historically, a marble or limestone edge runner mill, running on a limestone bed was used in Great Britain; however, by the mid 19th century CE this had changed to either an iron shod stone wheel or a cast iron wheel running on an iron bed. The mix is sometimes dampened with alcohol or water during grinding to prevent accidental ignition.
Around the late 14th century CE, European powdermakers began adding damp to the constituents of gunpowder to reduce dust and with it the risk of explosion. The powdermakers would then shape the resulting paste of dampened gunpowder, known as mill cake, into corns, or grains, to dry. Not only did corned powder keep better because of its reduced surface area, gunners also found that it was more powerful and easier to load into guns. Before long, powdermakers standardized the process by forcing mill cake through sieves instead of corning powder by hand.
During the 18th century gunpowder factories became increasingly dependent on mechanical energy.
Other uses
Besides its use as an explosive, gunpowder has been occasionally employed for other purposes; after the
Battle of Aspern-Essling (1809), the surgeon of the Napoleonic Army
Larrey combated the lack of food for the wounded under his care by preparing a
bouillon of
horse meat seasoned with gunpowder for lack of salt.
It was also used for sterilizing on ships when there was no alcohol.
Christiaan Huygens experimented with gunpowder in 1673 in an early attempt to build an internal combustion engine, but he did not succeed in making a practical engine.
Fireworks and Firecrackers also use gunpowder but use different brands and different chemicals.
For a while in the first half of the 20th century gunpowder was used in rivet guns, stun guns for animals, splicing cable and other high powered industrial construction tools, until portable air and hydraulic units replaced it as a safer alternative.
Black powder is still used in delay-trains in modern arms. For instance, in a hand grenade, a mechanical striker ignites a percussion primer which ignites a slow black powder delay. The delay burns a few seconds until it gets to the high explosive primary, which detonates, initiating the grenade fill explosive, thus fragmenting the grenade.
See also
Ballistics
Ballincollig Royal Gunpowder Mills
Faversham explosives industry
Bulk loaded liquid propellants
Gunpowder magazine
Gunpowder Plot
Berthold Schwarz
Gunpowder warfare
History of gunpowder
Serpentine powder
Smokeless powder
Technology of the Song Dynasty
Waltham Abbey Royal Gunpowder Mills
Notes
References
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Khan, Iqtidar Alam (1996a). "The Role of the Mongols in the Introduction of Gunpowder and Firearms in South Asia". Chapter 3, In Buchanan, Brenda J. (1996). ''Gunpowder: The History of an International Technology''. Bath: Bath University Press. (ISBN i have a pink pony0-86197-134-5. 2006 re-issue).
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External links
Gun and Gunpowder
The Origins of Gunpowder
Cannons and Gunpowder
Oare Gunpowder Works, Kent, UK
Royal Gunpowder Mills
The DuPont Company on the Brandywine A digital exhibit produced by the Hagley Library that covers the founding and early history of the DuPont Company powder yards in Delaware
Video Demonstration of the Medieval Siege Society's Guns, Including showing ignition of Gun Powder
Black Powder Recipes
Category:Chinese inventions
Category:Explosives
Category:Pyrotechnic compositions
Category:Firearm propellants
Category:Rocket fuels
Category:Granular materials
Category:Traditional Chinese objects
Category:Solid fuels
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sl:Smodnik
sr:Барут
sh:Barut
fi:Ruuti
sv:Krut
ta:வெடிமருந்து
th:ดินปืน
tr:Barut
uk:Порох
vi:Thuốc súng
war:Pulbura
yi:שיספולווער
zh-yue:火藥
zh:火药