calamine brass

calamine brass
an alloy of zinc carbonate and copper, formerly used to imitate gold.

* * *

alloy
      alloy of copper with zinc, produced by heating fragments of copper with charcoal and a zinc ore, calamine or smithsonite, in a closed crucible to red heat (about 1,300° C, or 2,400° F). The ore is reduced to a zinc vapour that diffuses into the copper. Apparently invented in Asia Minor, this method of brass manufacture was common from the 1st millennium BC. In Roman times a brass industry was established based on this process. It continued in use through the 18th century, long after metallic zinc was known, because the calamine brass was esteemed more highly than the brass made by melting the copper and zinc together. See also brass.

* * *


Universalium. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • 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… …   Wikipedia

  • calamine brass — an alloy of zinc carbonate and copper, formerly used to imitate gold …   Useful english dictionary

  • Calamine (disambiguation) — Calamine has different meanings, depending on the context:* Calamine, a pinkish powder used in calamine lotion * Calamine (mineral), a historic name for a zinc mineral * Calamine brass, an early method of making brass, by reacting copper metal… …   Wikipedia

  • Calamine (mineral) — This article is about calamine in mineralogy. For calamine used in calamine lotion, see calamine, for other uses of the word, see calamine (disambiguation). Calamine is a historic name for an ore of zinc. The name calamine was derived from the… …   Wikipedia

  • Brass — For other uses, see Brass (disambiguation). Brass die, along with zinc and copper samples. Brass is an alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties.[1] In …   Wikipedia

  • Zinc — This article is about the metallic element. For other uses, see Zinc (disambiguation). copper ← zinc → gallium ↑ Zn ↓ Cd …   Wikipedia

  • metalwork — metalworker, n. /met l werrk /, n. objects made of metal. [1840 50; METAL + WORK] * * * Useful and decorative objects fashioned of various metals. The oldest technique is hammering. After с 2500 BC, casting was also used, molten metal being… …   Universalium

  • Latten — The term Latten refers loosely to copper alloys, much like brass, employed in the Middle Ages and through to the late 18th and early 19th Centuries, for items such as decorative effect on borders, rivets or other details of metalwork… …   Wikipedia

  • Cementation process — The cementation process is an obsolete technique for making steel by carburization of iron. Unlike modern steelmaking it increased the amount of carbon in the iron. It was apparently developed before the 17th century. OriginsThe process probably… …   Wikipedia

  • List of alloys — This is a list of named alloys grouped alphabetically by base metal. Within these headings the alloys are also grouped alphabetically. Some of the main alloying elements are optionally listed after the alloy names. Contents 1 Alloys of aluminium… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”