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Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloids (such as arsenic or silicon).
French ormolu mantel clock (around 1800) by Julien Béliard (1758 – died after 1806), Paris.The clock case by Claude Galle (1758–1815) Ormolu (/ ˈ ɔːr m ə ˌ l uː /; from French or moulu 'ground/pounded gold') is the gilding technique of applying finely ground, high-carat gold–mercury amalgam to an object of bronze, and objects finished in this way.
When the mercury has evaporated, indicated by the surface taking on a dull yellow color, the metal must undergo further steps to exhibit its fine gold color. First, the gilded surface is rubbed with a scratch brush of brass wire, until its surface is smooth. It is then covered with gilding wax, and again exposed to fire until the wax is burnt off.
Venetian glass (Italian: vetro veneziano) is glassware made in Venice, typically on the island of Murano near the city. Traditionally it is made with a soda–lime "metal" and is typically elaborately decorated, with various "hot" glass-forming techniques, as well as gilding , enamel , or engraving .
Bronze weapon from the Mesara Plain, Crete. Copper came into use in the Aegean area near the end of the predynastic age of Egypt about 3500 BC. The earliest known implement is a flat celt, which was found on a Neolithic house-floor in the central court of the palace of Knossos in Crete, and is regarded as an Egyptian product.
Gilding metal was also used for the "bronze" Olympic medal at the 2020 Summer Olympics held in Tokyo, Japan in 2021. [5] Gilding metal may be annealed by heating to between 800–1,450 °F (427–788 °C). [6] It should be cooled slowly afterwards, to reduce risk of cracking. [7]