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Verdigris (/ ˈvɜːrdɪɡriː (s)/) [1] is a common name for any of a variety of somewhat poisonous [2][3][4][5] copper salts of acetic acid, which range in colour from green to a bluish-green depending on their chemical composition. [6]: 132 Once used as a medicine [7][8] and pharmaceutical preparation, [9]: 176 [10] verdigris occurs ...
They are bronze casts with some silver-colored parts, which originate from the Anatolian region. [2] Similar processes can be found on some ancient Egyptian copper sheets. [3] Another example of early chemical coloring of metals is the Nebra sky disk, which has a green patina and gold inlays. An early example of black colored iron is the famous ...
Patina (/ p ə ˈ t iː n ə / pə-TEE-nə or / ˈ p æ t ɪ n ə / PAT-ih-nə) is a thin layer that variously forms on the surface of copper, brass, bronze, and similar metals and metal alloys (tarnish produced by oxidation or other chemical processes), or certain stones [1] and wooden furniture (sheen produced by age, wear, and polishing), or ...
Its name comes from the natural pigments that form a patina on copper, bronze, and brass as it ages. [2] The most famous example is the green patina that formed on the Statue of Liberty in New York Harbor. In the Middle Ages, the patina was made by attaching copper strips to a wooden block with acetic acid, then burying the sealed block in dung ...
RAL colour standard. RAL is a colour management system used in Europe that is created and administered by the German RAL gGmbH [de][1] (RAL non-profit LLC), which is a subsidiary of the German RAL Institute [de]. In colloquial speech, RAL refers to the RAL Classic system, mainly used for varnish and powder coating, but now plastics as well.
Number Sample Colour name Description, examples RAL 6000: Patina green: RAL 6001: Emerald green: Emerald: RAL 6002: Leaf green: RAL 6003: Olive green: East German army RAL 6004: Blue green: RAL 6005: Moss green: British racing green [citation needed] RAL 6006: Grey olive: Standard Feldgrau used by the Wehrmacht [7] RAL 6007: Bottle green: RAL ...
Source. [1] /Maerz and Paul [1] ISCC–NBS descriptor. Strong orange. B: Normalized to [0–255] (byte) Bronze statue of the Roman Emperor Augustus. Bronze is a metallic brown color which resembles the metal alloy bronze. A bronze medal. The first recorded use of bronze as a color name in English was in 1753.
The Nebra sky disc, c. 1800–1600 BC. The Nebra sky disc (German: Himmelsscheibe von Nebra, pronounced [ˈhɪml̩sˌʃaɪbə fɔn ˈneːbra]) is a bronze disc of around 30 cm (12 in) diameter and a weight of 2.2 kg (4.9 lb), having a blue-green patina and inlaid with gold symbols.
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