Osmond iron (also spelt osmund and also called osborn) was

wrought iron Wrought iron is an iron alloy with a very low carbon content (less than 0.08%) in contrast to that of cast iron (2.1% to 4%). It is a semi-fused mass of iron with fibrous slag Inclusion (mineral), inclusions (up to 2% by weight), which give it a ...

made by a particular process. This is associated with the first

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

an production of

cast iron Cast iron is a class of iron–carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impuriti ...

in furnaces such as

Lapphyttan Lapphyttan or Lapphyttejarn in Norberg Municipality, Sweden, may be regarded as the type site for the Medieval Blast Furnace. Its date is probably between 1150 and 1350. It produced cast iron, which was then fined to make ferritic wrought iron c ...

Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...

. Osmonds appear in some of the earliest

English English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national ide ...

Customs accounts, for example in 1325. The ''kappe'' a Swedish iron weight used for osmond occurs in a commercial treaty in

Novgorod Veliky Novgorod ( rus, links=no, Великий Новгород, t=Great Newtown, p=vʲɪˈlʲikʲɪj ˈnovɡərət), also known as just Novgorod (), is the largest city and administrative centre of Novgorod Oblast, Russia. It is one of the ol ...

in 1203, and this implies the production of osmond iron. Osmond iron was made by melting

pig iron Pig iron, also known as crude iron, is an intermediate product of the iron industry in the production of steel which is obtained by smelting iron ore in a blast furnace. Pig iron has a high carbon content, typically 3.8–4.7%, along with silic ...

in a

hearth A hearth () is the place in a home where a fire is or was traditionally kept for home heating and for cooking, usually constituted by at least a horizontal hearthstone and often enclosed to varying degrees by any combination of reredos (a lo ...

that is narrower and deeper than a typical finery in an English

finery forge A finery forge is a forge used to produce wrought iron from pig iron by decarburization in a process called "fining" which involved liquifying cast iron in a fining hearth and removing carbon from the molten cast iron through oxidation. Finery ...

. The hearth had a charcoal fire blown with bellows through a tuyere. As the iron melted, the drops fell through the blast and congealed. They were then lifted with an iron bar into the blast. As they melted they were caught on the end of a large staff, held in the fire and turned rapidly so that the drops spread out, forming a ball. Osmonds reached England during the later

Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire a ...

through the port of

Gdańsk Gdańsk ( , also ; ; csb, Gduńsk;Stefan Ramułt, ''Słownik języka pomorskiego, czyli kaszubskiego'', Kraków 1893, Gdańsk 2003, ISBN 83-87408-64-6. , Johann Georg Theodor Grässe, ''Orbis latinus oder Verzeichniss der lateinischen Benen ...

. However, there were hammer mills in its hinterland and that of

Lübeck Lübeck (; Low German also ), officially the Hanseatic City of Lübeck (german: Hansestadt Lübeck), is a city in Northern Germany. With around 217,000 inhabitants, Lübeck is the second-largest city on the German Baltic coast and in the stat ...

, which made the osmonds into

bar iron Wrought iron is an iron alloy with a very low carbon content (less than 0.08%) in contrast to that of cast iron (2.1% to 4%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it a wood-like "grain" t ...

. In the 1620s,

Gustav II Adolf Gustavus Adolphus (9 December ld Style and New Style dates, N.S 19 December15946 November ld Style and New Style dates, N.S 16 November1632), also known in English as Gustav II Adolf or Gustav II Adolph, was King of Sweden from 1611 to ...

of Sweden prohibited his subjects from exporting unfinished iron, and all trade in osmonds ceased. The osmond process was also used in the

county of Mark The County of Mark (german: Grafschaft Mark, links=no, french: Comté de La Marck, links=no colloquially known as ) was a county and state of the Holy Roman Empire in the Lower Rhenish–Westphalian Circle. It lay on both sides of the Ruhr River ...

Westphalia Westphalia (; german: Westfalen ; nds, Westfalen ) is a region of northwestern Germany and one of the three historic parts of the state of North Rhine-Westphalia. It has an area of and 7.9 million inhabitants. The territory of the regio ...

, in southern

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

and

Switzerland ). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...

. The process was introduced to

Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...

in connection with the establishment by

William Humfrey William Humfrey (also Humphrey or Humphreys) (c.1515–1579) was an English goldsmith, mining promoter, and Assay Master at the Royal Mint during the reign of Elizabeth I. Life Little is known of Humfrey's life before 1560, when he is record ...

and others of

wireworks Wire drawing is a metalworking process used to reduce the cross-section of a wire by pulling the wire through a single, or series of, drawing die(s). There are many applications for wire drawing, including electrical wiring, cables, tension-lo ...

Tintern Tintern ( cy, Tyndyrn) is a village in the community (Wales), community of Wye Valley (community), Wye Valley, on the west bank of the River Wye in Monmouthshire, Wales, close to the border with England, about north of Chepstow. It is popular w ...

in 1566, an enterprise that was shortly afterwards taken over by the

Company of Mineral and Battery Works The Company of Mineral and Battery Works was, (with the Society of the Mines Royal), one of two mining monopolies created by Elizabeth I. The Company's rights were based on a patent granted to William Humfrey on 17 September 1565. This was replac ...

. Humfrey arranged to bring an expert maker of Osmond iron, Corslett Tinkhaus, from southwest Westphalia, where the production had reached a high level of technical proficiency. Tinkhaus arrived in Wales in 1567 and began working at Rhydygwern in the

Glamorgan , HQ = Cardiff , Government = Glamorgan County Council (1889–1974) , Origin= , Code = GLA , CodeName = Chapman code , Replace = * West Glamorgan * Mid Glamorgan * South Glamorgan , Motto ...

part of the lordship of

Machen Machen (from Welsh language, Welsh ' "place (of)" + ', a personal name) is a large village three miles east of Caerphilly, south Wales. It is situated in the Caerphilly (county borough), Caerphilly borough within the Historic counties of Wales, ...

. This was where the first

Forge A forge is a type of hearth used for heating metals, or the workplace (smithy) where such a hearth is located. The forge is used by the smith to heat a piece of metal to a temperature at which it becomes easier to shape by forging, or to th ...

was, and he was evidently making osmond iron there. The iron was apparently forged with a

tilt hammer A trip hammer, also known as a tilt hammer or helve hammer, is a massive powered hammer. Traditional uses of trip hammers include pounding, decorticating and polishing of grain in agriculture. In mining, trip hammers were used for crushing metal ...

, rather than the helve hammer, usual in

s. This was the raw material for the wireworks at Tintern. Osmond iron was made at

Pontypool Pontypool ( cy, Pont-y-pŵl ) is a town and the administrative centre of the county borough of Torfaen, within the historic boundaries of Monmouthshire in South Wales. It has a population of 28,970. Location It is situated on the Afon Lwyd ri ...

in the 18th century to supply wireworks there, and one of the forges there was still called the 'Osborn Forge' in the 19th century.Schubert, 297–302.

References

{{Iron and steel production Ferrous alloys Metallurgical processes Iron County of Mark