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Kuromido
''Kuromido'' (Japanese: 黒味銅) is an historically Japanese copper alloy, typically of 99% copper and 1% metallic arsenic,Oxford, Butterworth-Heinemannm 1993: La Niece and Craddock, eds, Metal Plating and Patination: cultural, technical and historical developments - Chap. 7, Murakami, Ryu, "Japanese Traditional Alloys" one of the class of irogane metals. It is used in the production of other alloys, and in decorative fittings, as well as in mokume-gane processes. See also * ''Shakudō'' * ''Shibuichi'' * Corinthian bronze and ''hepatizon'' (Black bronze) * ''Electrum'' * ''Orichalcum'' * ''Panchaloha'' * ''Tumbaga ''Tumbaga'' is the name for a non-specific alloy of gold and copper given by Spanish Conquistadors to metals composed of these elements found in widespread use in pre-Columbian Mesoamerica in North America and South America. The term is believe ...'' External sources * References Irogane Copper alloys Arsenic {{alloy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shakudō
''Shakudō'' (赤銅) is a Japanese billon of gold and copper (typically 4–10% gold, 96–90% copper), one of the ''irogane'' class of colored metals, which can be treated to develop a black, or sometimes indigo, patina, resembling lacquer. Unpatinated ''shakudō'' visually resembles bronze; the dark color is induced by the ''niiro'' artificial patination process, involving boiling in a solution, generally including ''rokushō''. Naming The characters in the name ''shaku-dō'' mean "red" and "copper" but combined they represent this material which begins with a darkened coppery-bronze color and is then modified to black or near-black. History Early uses The word "shakudō" first appears in records of the Japanese "Nara" period (710-784 AD), but it is not clear to what it referred (it could have been some form of copper, or a form of the now-known material). There are actual pieces known from the 12th century onwards. Shakudō was historically used to construct or decorate Ja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shibuichi
is a historically Japanese copper alloy, a member of the ''irogane'' class, which is patinated into a range of subtle greys and muted shades of blue, green, and brown, through the use of ''niiro'' processes, involving the ''rokushō'' compound. Naming ''Shibuichi'' means "one-fourth" in Japanese, and indicates the standard formulation of one part silver to three parts copper, though this may be varied considerably according to the desired effect. Several major variants of the alloy have specific names, as detailed below. In addition, the metal in general, and especially the paler shades, may be named ''rogin''. Composition Aside from the basic 25% silver to 75% copper mix, combinations as divergent as 5% silver to 95% copper are also marketed as "shibuichi".Art Jewelry Magazine, March, 2010. A wide range of colours can be achieved using the whole range of alloy compositions, even above 50% silver, e.g. 90% copper and 10% silver for a dark grey and down to 70% copper and 30% sil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irogane
''Irogane'' (色金 "coloured metals")Vienna, Bohlau Verlag, 2009: Griesser-Stermscheg & Krist, eds., Metallkonservierung, Metallrestaurierung: Geschichte, Methode, Praxis is the term for a set of Japanese metals – forms of copper (with natural impurities), and copper alloys – treated in ''niiro'' patination processes,London, UK, 1988: International Institute for Conservation of Historic and Artistic Works, Studies in Conservation – The Conservation of Far Eastern Art (Kyoto Congress 1988 Preprints), Mills ''et al''., eds., p. 133-136: Murakami et al, "Characterization of the black surface layer on a copper alloy coloured by traditional Japanese surface treatment" – "Irogane is the general term for the alloys coloured ..." traditionally used in sword-making, catches for sliding doors, and luxury highlights on larger objects, and in modern times, in jewellery. The alloys contain two to five metals. Some scholars believe that methods similar to those involved in irog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irogane
''Irogane'' (色金 "coloured metals")Vienna, Bohlau Verlag, 2009: Griesser-Stermscheg & Krist, eds., Metallkonservierung, Metallrestaurierung: Geschichte, Methode, Praxis is the term for a set of Japanese metals – forms of copper (with natural impurities), and copper alloys – treated in ''niiro'' patination processes,London, UK, 1988: International Institute for Conservation of Historic and Artistic Works, Studies in Conservation – The Conservation of Far Eastern Art (Kyoto Congress 1988 Preprints), Mills ''et al''., eds., p. 133-136: Murakami et al, "Characterization of the black surface layer on a copper alloy coloured by traditional Japanese surface treatment" – "Irogane is the general term for the alloys coloured ..." traditionally used in sword-making, catches for sliding doors, and luxury highlights on larger objects, and in modern times, in jewellery. The alloys contain two to five metals. Some scholars believe that methods similar to those involved in irog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hepatizon
''Hepatizon'' (Greek etymology: , English translation: "liver"), also known as black Corinthian bronze, was a highly valuable metal alloy in classical antiquity. It is thought to be an alloy of copper with the addition of a small proportion of gold and silver (perhaps as little as 8% of each), mixed and treated to produce a material with a dark purplish patina, similar to the colour of liver. It is referred to in various ancient texts, but few known examples of hepatizon exist today. Of the known types of bronze or brass in classical antiquity (known in Latin as ''aes'' and in Greek as χαλκός), hepatizon was the second most valuable. Pliny the Elder mentions it in his '' Natural History'', stating that it is less valuable than Corinthian bronze, which contained a greater proportion of gold or silver and as a result resembled the precious metals, but was esteemed before bronze from Delos and Aegina. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tumbaga
''Tumbaga'' is the name for a non-specific alloy of gold and copper given by Spanish Conquistadors to metals composed of these elements found in widespread use in pre-Columbian Mesoamerica in North America and South America. The term is believed to be a borrowing from Malay , meaning 'copper' or 'brass'. It has also been spelled ''tumbago'' in literature. Composition and properties Tumbaga is an alloy composed mostly of gold and copper. It has a significantly lower melting point than gold or copper alone. It is harder than copper, but maintains malleability after being pounded. Tumbaga can be treated with a simple acid, like citric acid, to dissolve copper off the surface. What remains is a shiny layer of nearly pure gold on top of a harder, more durable copper-gold alloy sheet. This process is referred to as depletion gilding. Use and function Tumbaga was widely used by the pre-Columbian cultures of South and Central America to make religious objects. Like most gold alloys, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panchaloha
''Panchaloha'' ( sa, पञ्चलोह), also called ''Pañcadhātu'' ( sa, पञ्चधातु, lit=five metals), is a term for traditional five-metal alloys of sacred significance, used for making Hinduism, Hindu temple ''murti'' and jewelry. Composition The composition is laid down in the ''Shilpa shastras'', a collection of ancient texts that describe arts, crafts, and their design rules, principles and standards. Panchaloha is traditionally described as an alloy of Gold (element), gold, silver, copper, brass, and iron. It is believed that wearing jewellery made of such an alloy brings balance in life, self-confidence, good health, fortune, prosperity, and peace of mind. In Tibetan culture, it was considered auspicious to use ''thokcha'' (iron meteorite, meteoric iron) either as a component of the alloy in general or for a specific object or purpose. The amount used could vary, depending upon the material's availability and suitability, among other considerations. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orichalcum
Orichalcum or aurichalcum is a metal mentioned in several ancient writings, including the story of Atlantis in the ''Critias'' of Plato. Within the dialogue, Critias (460–403 BC) claims that orichalcum had been considered second only to gold in value and had been found and mined in many parts of Atlantis in ancient times, but that by Critias's own time orichalcum was known only by name. Orichalcum may have been a noble metal such as platinum, as it was supposed to be mined, or one type of bronze or brass or possibly some other metal alloy. Overview The name is derived from the Greek , ' (from , ', mountain and , ', copper), meaning literally "mountain copper". The Romans transliterated "orichalcum" as "aurichalcum", which was thought to mean literally "gold copper". It is known from the writings of Cicero that the metal which they called orichalcum resembled gold in color but had a much lower value. In Virgil's ''Aeneid'', the breastplate of Turnus is described as "stif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrum
Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially, and is also known as "green gold".Emsley, John (2003Nature's building blocks: an A–Z guide to the elements Oxford University Press. . p. 168 Electrum was used as early as the third millennium BC in Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks. It was also used in the making of ancient drinking vessels. The first known metal coins made were of electrum, dating back to the end of the 7th century or the beginning of the 6th century BC. For several decades, the medals awarded with the Nobel Prize have been made of gold-plated green gold. Etymology The name "electrum" is the Latinized form of the Greek word ἤλεκτρον (''ḗlektron''), mentioned in the ''Odyssey' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Language
is spoken natively by about 128 million people, primarily by Japanese people and primarily in Japan, the only country where it is the national language. Japanese belongs to the Japonic or Japanese- Ryukyuan language family. There have been many attempts to group the Japonic languages with other families such as the Ainu, Austroasiatic, Koreanic, and the now-discredited Altaic, but none of these proposals has gained widespread acceptance. Little is known of the language's prehistory, or when it first appeared in Japan. Chinese documents from the 3rd century AD recorded a few Japanese words, but substantial Old Japanese texts did not appear until the 8th century. From the Heian period (794–1185), there was a massive influx of Sino-Japanese vocabulary into the language, affecting the phonology of Early Middle Japanese. Late Middle Japanese (1185–1600) saw extensive grammatical changes and the first appearance of European loanwords. The basis of the standard dialect moved f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corinthian Bronze
Corinthian bronze, also named Corinthian brass or aes Corinthiacum, was a highly valuable metal alloy in classical antiquity. It is thought to be an alloy of copper with gold or silver (or both), although it has also been contended that it was simply a very high grade of bronze, or a kind of bronze that was manufactured in Corinth. It is referred to in various ancient texts, but no certain examples of Corinthian bronze exist today. However, it has been increasingly suggested that a number of artefacts previously described as niello in fact use a technique of patinated metal that may be the same as Corinthian bronze and is similar to the Japanese Shakudō. Its composition was long a mystery, but contemporary thinking is that Corinthian bronze was "a patinated alloy of copper with some gold and silver", perhaps the same as the ''hesmen kem'' or "black copper" of Ancient Egyptian art. This is shown by ancient texts to be a prestigious material, and apparently survives in a number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans Japanese archipelago, an archipelago of List of islands of Japan, 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa Island, Okinawa. Tokyo is the Capital of Japan, nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the List of countries and dependencies by population, eleventh most populous country in the world, as well as one of the List of countries and dependencies by population density, most densely populated and Urbanization by country, urbanized. About three-fourths of Geography of Japan, the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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