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Egyptian Blue
Egyptian blue, also known as calcium copper silicate (CaCuSi4O10 or CaOCuO(SiO2)4 (calcium copper tetrasilicate)) or cuprorivaite, is a pigment that was used in ancient Egypt for thousands of years. It is considered to be the first synthetic pigment. It was known to the Romans by the name '' caeruleum''. After the Roman era, Egyptian blue fell from use and, thereafter, the manner of its creation was forgotten. In modern times, scientists have been able to analyze its chemistry and reconstruct how to make it. The ancient Egyptian word wꜣḏ signifies blue, blue-green, and green. The first recorded use of "Egyptian blue" as a color name in English was in 1809. Definition Egyptian blue is a synthetic blue pigment produced from a mixture of silica, lime, copper, and an alkali. Its color is due to a calcium-copper tetrasilicate CaCuSi4O10 of the same composition as the naturally occurring mineral cuprorivaite. It was first synthesized in Egypt during the Fourth Dynasty an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pigment
A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compounds. Pigments of prehistoric and historic value include ochre, charcoal, and lapis lazuli. Economic impact In 2006, around 7.4 million tons of inorganic, organic, and special pigments were marketed worldwide. Estimated at around US$14.86 billion in 2018 and will rise at over 4.9% CAGR from 2019 to 2026. The global demand for pigments was roughly US$20.5 billion in 2009. According to an April 2018 report by ''Bloomberg Businessweek'', the estimated value of the pigment industry globally is $30 billion. The value of titanium dioxide – used to enhance the white brightness of many products – was placed at $13.2 billion per year, while the color Ferrari red is valued at $300 million each year. Physical principles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frit
A frit is a ceramic composition that has been fused, quenched, and granulated. Frits form an important part of the batches used in compounding enamels and ceramic glazes; the purpose of this pre-fusion is to render any soluble and/or toxic components insoluble by causing them to combine with silica and other added oxides.''Dictionary of Ceramics'' (3rd Edition) Edited by Dodd, A. Murfin, D. Institute of Materials. 1994. However, not all glass that is fused and quenched in water is frit, as this method of cooling down very hot glass is also widely used in glass manufacture. According to the ''OED'', the origin of the word "frit" dates back to 1662 and is "a calcinated mixture of sand and fluxes ready to be melted in a crucible to make glass". Nowadays, the unheated raw materials of glass making are more commonly called "glass batch". In antiquity, frit could be crushed to make pigments or shaped to create objects. It may also have served as an intermediate material in the manufac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natron
Natron is a naturally occurring mixture of sodium carbonate decahydrate ( Na2CO3·10H2O, a kind of soda ash) and around 17% sodium bicarbonate (also called baking soda, NaHCO3) along with small quantities of sodium chloride and sodium sulfate. Natron is white to colourless when pure, varying to gray or yellow with impurities. Natron deposits are sometimes found in saline lake beds which arose in arid environments. Throughout history natron has had many practical applications that continue today in the wide range of modern uses of its constituent mineral components. In modern mineralogy the term ''natron'' has come to mean only the sodium carbonate decahydrate (hydrated soda ash) that makes up most of the historical salt. Etymology The English and German word ''natron'' is a French cognate derived from the Spanish ''natrón'' through Latin ''natrium'' and Greek ''nitron'' (). This derives from the Ancient Egyptian word ''nṯrj''. ''Natron'' refers to Wadi El Natrun or Na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Architectura
(''On architecture'', published as ''Ten Books on Architecture'') is a treatise on architecture written by the Roman architect and military engineer Marcus Vitruvius Pollio and dedicated to his patron, the emperor Caesar Augustus, as a guide for building projects. As the only treatise on architecture to survive from antiquity, it has been regarded since the Renaissance as the first book on architectural theory, as well as a major source on the canon of classical architecture. It contains a variety of information on Greek and Roman buildings, as well as prescriptions for the planning and design of military camps, cities, and structures both large (aqueducts, buildings, baths, harbours) and small (machines, measuring devices, instruments). Since Vitruvius published before the development of cross vaulting, domes, concrete, and other innovations associated with Imperial Roman architecture, his ten books give no information on these hallmarks of Roman building design and technolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitruvius
Vitruvius (; c. 80–70 BC – after c. 15 BC) was a Roman architect and engineer during the 1st century BC, known for his multi-volume work entitled '' De architectura''. He originated the idea that all buildings should have three attributes: , , and ("strength", "utility", and "beauty"). These principles were later widely adopted in Roman architecture. His discussion of perfect proportion in architecture and the human body led to the famous Renaissance drawing of the '' Vitruvian Man'' by Leonardo da Vinci. Little is known about Vitruvius' life, but by his own descriptionDe Arch. Book 1, preface. section 2. he served as an artilleryman, the third class of arms in the Roman military offices. He probably served as a senior officer of artillery in charge of ''doctores ballistarum'' (artillery experts) and ''libratores'' who actually operated the machines. As an army engineer he specialized in the construction of '' ballista'' and '' scorpio'' artillery war machines for siege ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Kingdom
New is an adjective referring to something recently made, discovered, or created. New or NEW may refer to: Music * New, singer of K-pop group The Boyz Albums and EPs * ''New'' (album), by Paul McCartney, 2013 * ''New'' (EP), by Regurgitator, 1995 Songs * "New" (Daya song), 2017 * "New" (Paul McCartney song), 2013 * "New" (No Doubt song), 1999 *"new", by Loona from '' Yves'', 2017 *"The New", by Interpol from '' Turn On the Bright Lights'', 2002 Acronyms * Net economic welfare, a proposed macroeconomic indicator * Net explosive weight, also known as net explosive quantity * Network of enlightened Women, a conservative university women's organization * Next Entertainment World, a South Korean film distribution company Identification codes * Nepal Bhasa language ISO 639 language code * New Century Financial Corporation (NYSE stock abbreviation) * Northeast Wrestling, a professional wrestling promotion in the northeastern United States Transport * New Orleans Lakefront ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Kingdom Of Egypt
The Middle Kingdom of Egypt (also known as The Period of Reunification) is the period in the history of ancient Egypt following a period of political division known as the First Intermediate Period. The Middle Kingdom lasted from approximately 2040 to 1782 BC, stretching from the reunification of Egypt under the reign of Mentuhotep II in the Eleventh Dynasty to the end of the Twelfth Dynasty. The kings of the Eleventh Dynasty ruled from Thebes and the kings of the Twelfth Dynasty ruled from el-Lisht. The concept of the Middle Kingdom as one of three golden ages was coined in 1845 by German Egyptologist Baron von Bunsen, and its definition evolved significantly throughout the 19th and 20th centuries. Some scholars also include the Thirteenth Dynasty of Egypt wholly into this period, in which case the Middle Kingdom would end around 1650 BC, while others only include it until Merneferre Ay around 1700 BC, last king of this dynasty to be attested in both Upper and Lower Egy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Museum Of Fine Arts, Boston
The Museum of Fine Arts (often abbreviated as MFA Boston or MFA) is an art museum in Boston, Massachusetts. It is the 20th-largest art museum in the world, measured by public gallery area. It contains 8,161 paintings and more than 450,000 works of art, making it one of the most comprehensive collections in the Americas. With more than 1.2 million visitors a year, it is the 52nd–most visited art museum in the world . Founded in 1870 in Copley Square, the museum moved to its current Fenway location in 1909. It is affiliated with the School of the Museum of Fine Arts at Tufts. History 1870–1907 The Museum of Fine Arts was founded in 1870 and was initially located on the top floor of the Boston Athenaeum. Most of its initial collection came from the Athenæum's Art Gallery. Francis Davis Millet, a local artist, was instrumental in starting the art school affiliated with the museum, and in appointing Emil Otto Grundmann as its first director. In 1876, the museum moved to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hierakonpolis
Nekhen ( egy, nḫn, ); in grc, Ἱεράκων πόλις Hierakonpolis ( either: City of the Hawk, or City of the Falcon, a reference to Horus or ''Hierakōn polis'' "Hawk City" in arz, الكوم الأحمر, el-Kōm el-Aḥmar, lit=the Red Mound) was the religious and political capital of Upper Egypt at the end of prehistoric Egypt ( 3200–3100 BC) and probably also during the Early Dynastic Period ( 3100–2686 BC). The oldest known tomb with painted decoration, a mural on its plaster walls, is located in Nekhen and is thought to date to c. 3500–3200 BC. It shares distinctive imagery with artifacts from the Gerzeh culture.Oldest known zoological collection was also found in the area. Horus cult center Nekhen was the center of the cult of a hawk deity, Horus of Nekhen, which raised one of the most ancient Egyptian temples in this city. It retained its importance as the cultic center for this divine patron of the kings long after the site had otherwise declined. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naqada III
Naqada III is the last phase of the Naqada culture of ancient Egyptian prehistory, dating from approximately 3200 to 3000 BC. It is the period during which the process of state formation, which began in Naqada II, became highly visible, with named kings heading powerful polities. Naqada III is often referred to as Dynasty 0 or the Protodynastic Period to reflect the presence of kings at the head of influential states, although, in fact, the kings involved would not have been a part of a dynasty. In this period, those kings' names were inscribed in the form of serekhs on a variety of surfaces including pottery and tombs. History The Protodynastic Period in ancient Egypt was characterised by an ongoing process of political unification, culminating in the formation of a single state to begin the Early Dynastic Period. Furthermore, it is during this time that the Egyptian language was first recorded in hieroglyphs. There is also strong archaeological evidence of Egyptian set ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pre-dynastic Period Of Egypt
Prehistoric Egypt and Predynastic Egypt span the period from the earliest human settlement to the beginning of the Early Dynastic Period around 3100 BC, starting with the first Pharaoh, Narmer for some Egyptologists, Hor-Aha for others, with the name Menes also possibly used for one of these kings. At the end of prehistory, "Predynastic Egypt" is traditionally defined as the period from the final part of the Neolithic period beginning c. 6000 BC to the end of the Naqada III period c. 3000 BC. The dates of the Predynastic period were first defined before widespread archaeological excavation of Egypt took place, and recent finds indicating very gradual Predynastic development have led to controversy over when exactly the Predynastic period ended. Thus, various terms such as " Protodynastic period", "Zero Dynasty" or "Dynasty 0" are used to name the part of the period which might be characterized as Predynastic by some and Early Dynastic by others. The Predynastic period is gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The University Of Memphis
} The University of Memphis (UofM) is a public research university in Memphis, Tennessee. Founded in 1912, the university has an enrollment of more than 22,000 students. The university maintains the Herff College of Engineering, the Center for Earthquake Research and Information (CERI), the Cecil C. Humphreys School of Law, the former Lambuth University campus in Jackson, Tennessee (now a branch campus of the University of Memphis), the Loewenberg College of Nursing, the School of Public Health, the College of Communication and Fine Arts, the FedEx Institute of Technology, the Advanced Distributed Learning Workforce Co-Lab, and the Institute of Egyptian Art and Archaeology. The University of Memphis is classified among "R1: Doctoral Universities – Very High research activity". History In 1909, the Tennessee Legislature enacted the General Education Bill. This bill stated that three colleges be established, one within each grand division of the state and one additional scho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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