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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Egyptian blue ： ウィキペディア英語版 Egyptian blue Egyptian blue, also known as calcium copper silicate (CaCuSi4O10 or CaOCuO(SiO2)4) or cuprorivaite, is a pigment used in Ancient Egypt for thousands of years. It is considered to be the first synthetic pigment. The pigment was known to the Romans by the name ''caeruleum''. After the Roman era, Egyptian blue fell from use and the manner of its creation was forgotten. The ancient Egyptian word ''wadjet'' signifies blue, blue-green, and green. The first recorded use of 'Egyptian blue' as a color name in English was in 1809.〔Maerz and Paul ''A Dictionary of Color'' New York:1930 McGraw-Hill Page 194; Color Sample of Sunset: Page 93 Plate 35 Color Sample L8〕 ==Definition== Egyptian blue is a synthetic blue pigment made up of a mixture of silica, lime, copper, and alkali. Its color is due to a calcium-copper tetrasilicate CaCuSi4O10 of exactly the same composition as the naturally occurring mineral cuprorivaite. It occurs in Egypt during the third millennium BC and is the first synthetic pigment to have been produced there, continuing in use until the end of the Greco-Roman period (332 BC–395 AD). The term for it in the Egyptian language is ''hsbd-iryt'', which means artificial lapis lazuli (hsbd).〔Pagès-Camagna S, (1998) "Bleu et vert égyptiens en question: vocabulaire et analyses" in La couleur dans la peinture et l’émaillage de l’Egypte Ancienne, CUEBC, Ravello, 20–22 mars 1997 (Colinart S, Menu M, eds), Ed. Edipuglia, Bari, 51–59.〕 It was used in antiquity as a blue pigment to color a variety of different media such as stone, wood, plaster, papyrus, and canvas, and in the production of numerous objects, including cylinder seals, beads, scarabs, inlays, pots, and statuettes. It is also sometimes referred to in Egyptological literature as blue frit. Some have argued that this is an erroneous term that should be reserved for use to describe the initial phase of glass or glaze production, while others argue that Egyptian blue is a frit in both the fine and coarse form since it is a product of solid state reaction.〔Nicholson, P.T. & Henderson, J. 2000, Glass. In: In: P. Nicholson and I. Shaw (eds.), ''Ancient Egyptian materials and technology''. Cambridge: Cambridge University Press. ISBN 0-521-45257-0〕 Its characteristic blue color, resulting from one of its main components—copper—ranges from a light to a dark hue, depending on differential processing and composition. Apart from Egypt, it has also been found in the Near East, the Eastern Mediterranean, and the limits of the Roman Empire. It is unclear whether the pigment's existence elsewhere was a result of parallel invention or evidence of the technology's spread from Egypt to those areas. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Egyptian blue」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.