Calamine brass is brass produced by a particular alloying technique using calamine, a zinc ore, rather than metallic zinc. Calamine brass was produced using proportions of two-sevenths fine copper, four-sevenths calamine, and one-seventh shruff (old plate brass). Calamine brass was the first type of brass produced, probably starting during the 1st millennium BC, and was not replaced in Europe by other brass manufactures until the 18th century (it is likely that Chinese and Indian brass manufacturers had developed more advanced techniques some centuries earlier). Brass is an alloy of copper and zinc. ... An alloy is a combination, either in solution or compound, of two or more elements, at least one of which is a metal, and where the resultant material has metallic properties. ... Calamine is also an NYC based indie_pop band. ... An ore is a mineral deposit containing a metal or other valuable resource in economically viable concentrations. ... (2nd millennium BC – 1st millennium BC – 1st millennium – other millennia) Events The Iron Age began in Western Europe Egypt declined as a major power The Tanakh was written Buddhism was founded Cyrus the Great conquered Babylon and created the Persian Empire (6th century BC) Sparta and Athens fought the Peloponnesian... World map showing location of Europe Europe is geologically and geographically a peninsula, forming the westernmost part of Eurasia. ... (17th century - 18th century - 19th century - more centuries) As a means of recording the passage of time, the 18th century refers to the century that lasted from 1701 through 1800. ...

Brass is an alloy of copper and zinc, and when it was first developed, methods for producing metallic zinc were unknown. Metallurgists wishing to produce brass thus used calamine (actually a mixture of the virtually indistinguishable zinc ores smithsonite and hemimorphite) as the zinc component of brass. The resulting brasses, produced by heating a mixture of copper and calamine to a high temperature for several hours (allowing zinc vapor to distill from the ores and permeate the metallic copper), contained a significant amount of slag material resulting from the non-zinc components of calamine. The use of ore rather than metallic zinc also made it difficult to accurately produce the desired final proportion of copper to zinc. General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance copper, metallic Atomic mass 63. ... General Name, Symbol, Number zinc, Zn, 30 Chemical series transition metals Group, Period, Block 12, 4, d Appearance bluish pale gray Atomic mass 65. ... Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements and their mixtures, which are called alloys. ... Categories: Mineral stubs | Carbonate minerals ... Hemimorphite, is a sorosilicate mineral which has been mined from days of old from the upper parts of zinc and lead ores, chiefly associated with smithsonite. ... Vapor (US English) or vapour (British English) is the gaseous state of matter. ... This article is about the mining or chemical term. ...

Calamine brass was slowly phased out as zinc smelting techniques were developed in Europe, which produced metallic zinc more suitable for brass production than calamine. However, the conversion away from calamine brass manufacture was slow; a British patent was awarded to William Champion in 1738, but the alloying of metallic zinc and copper to produce brass was not patented until 1781 (by James Emerson), and calamine brass mills persisted in South Wales until as late as 1858. The slow diffusion of this technology was probably the result of economic factors. Chemical reduction or smelting is a form of extractive metallurgy. ... Patent - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... Events January 1 - Bouvet Island is discovered by French explorer Jean-Baptiste Charles Bouvet de Lozier. ... 1781 was a common year starting on Monday (see link for calendar). ... South Wales is an area of Wales bordered by England and the Bristol Channel to the East and South, and Mid Wales and West Wales to the North and West. ... 1858 is a common year starting on Friday. ...

References

• Alexander, W.O. "A Brief Review of the Development of the Copper, Zinc and Brass Industries in Great Britain from AD 1500 to 1900". Murex Review, 1:15, 1955.
• "A Short History of Baptist Mills Brass Works - Part One: The Early Years, 1700 - 1720". Retrieved August 3, 2005.