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Stonepaste
Fritware, also known as stone-paste, is a type of pottery in which frit (ground glass) is added to clay to reduce its fusion temperature. The mixture may include quartz or other siliceous material. An organic compound such as gum or glue may be added for binding. The resulting mixture can be fired at a lower temperature than clay alone. A glaze is then applied on the surface to harden the object. Fritware was invented to give a strong white body, which, combined with tin-glazing of the surface, allowed it to approximate the result of Chinese porcelain. True porcelain was not manufactured in the Islamic world until modern times, and most fine Islamic pottery was made of fritware. Frit was also a significant component in some early European porcelains. Composition and techniques Fritware was invented in the Medieval Islamic world to give a strong white body, which, combined with tin-glazing of the surface, allowed it to approximate the white colour, translucency, and thin wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iznik Pottery
Iznik pottery, or Iznik ware, named after the town of İznik in western Anatolia where it was made, is a decorated ceramic that was produced from the last quarter of the 15th century until the end of the 17th century. İznik was an established centre for the production of simple earthenware pottery with an underglaze decoration when, in the last quarter of the 15th century, craftsmen in the town began to manufacture high quality pottery with a fritware body painted with cobalt blue under a colourless transparent lead glaze. The designs combined traditional Ottoman arabesque patterns with Chinese elements. The change was almost certainly a result of active intervention and patronage by the recently established Ottoman court in Istanbul who greatly valued Chinese blue-and-white porcelain. During the 16th century the decoration of the pottery gradually changed in style, becoming looser and more flowing. Additional colours were introduced. Initially turquoise was combined with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raqqa Ware
Raqqa ware or Rakka ware is a style of lustreware pottery that was a mainstay of the economy of Raqqa in northeastern Syria during the Ayyubid dynasty."Raqqah ware , Definition & Facts". ''Encyclopedia Britannica''. Retrieved 12 December 2018. Though the ceramics were varied in character, they have been identified during the 20th century by on-site excavations that securely linked the highly sought-after surviving pieces to Raqqa.Burke, Katherine"Lustreware from Raqqa in the Ashmolean Museum"/ref> However, Raqqa was not the only production site and Raqqa Ware has been found at various locations on the Euphrates, such as Qala'at Balis.Blair, Sheila S., Jonathan M. Bloom, et al. 2003 "Islamic art." Grove Art Online.'12 Dec 2018. The pieces typically have a white body covered in siliceous glaze, with decorations in brown luster or blue and back underglaze. The glazes most often vary in both transparency and shades of turquoise, however other colors were also used. Raqqa ware typic ... [...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 manu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egyptian Faience
Egyptian faience is a sintered-quartz ceramic material from Ancient Egypt. The sintering process "covered he materialwith a true vitreous coating" as the quartz underwent vitrification, creating a bright lustre of various colours "usually in a transparent blue or green isotropic glass". Its name in the Ancient Egyptian language was , and modern archeological terms for it include sintered quartz, glazed frit, and glazed composition. is distinct from the crystalline pigment Egyptian blue, for which it has sometimes incorrectly been used as a synonym. It is not faience in the usual sense of tin-glazed pottery, and is different from the enormous range of clay-based Ancient Egyptian pottery, from which utilitarian vessels were made. It is similar to later Islamic stonepaste (or "fritware") from the Middle East, although that generally includes more clay. Egyptian faience is considerably more porous than glass proper. It can be cast in molds to create small vessels, jewelry and ... [...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 manu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stone Paste Dish Iznik Turkey 1550 1570
In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of magma in the asthenosphere. The study of rocks involves multiple subdisciplines of geology, including petrology and mineralogy. It may be limited to rocks found on Earth, or it may include planetary geology that studies the rocks of other celestial objects. Rocks are usually grouped into three main groups: igneous rocks, sedimentary rocks and metamorphic rocks. Igneous rocks are formed when magma cools in the Earth's crust, or lava cools on the ground surface or the seabed. Sedimentary rocks are formed by diagenesis and lithification of sediments, which in turn are formed by the weathering, transport, and deposition of existing rocks. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle-East
The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabia (including the Arabian Peninsula and Bahrain), Asia Minor (Asian part of Turkey except Hatay Province), East Thrace (European part of Turkey), Egypt, Iran, the Levant (including Ash-Shām and Cyprus), Mesopotamia (modern-day Iraq), and the Socotra Archipelago (a part of Yemen). The term came into widespread usage as a replacement of the term Near East (as opposed to the Far East) beginning in the early 20th century. The term "Middle East" has led to some confusion over its changing definitions, and has been viewed by some to be discriminatory or too Eurocentric. The region includes the vast majority of the territories included in the closely associated definition of Western Asia (including Iran), but without the South Caucasus, and additionally includes all of Egypt (not just the Sinai Region) and all of Turkey (not just the part barring East Thrace). Mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fatimid Caliphate
The Fatimid Caliphate was an Ismaili Shi'a caliphate extant from the tenth to the twelfth centuries AD. Spanning a large area of North Africa, it ranged from the Atlantic Ocean in the west to the Red Sea in the east. The Fatimids, a dynasty of Arab origin, trace their ancestry to Muhammad's daughter Fatima and her husband ‘Ali b. Abi Talib, the first Shi‘a imam. The Fatimids were acknowledged as the rightful imams by different Isma‘ili communities, but also in many other Muslim lands, including Persia and the adjacent regions. Originating during the Abbasid Caliphate, the Fatimids conquered Tunisia and established the city of "Mahdia, al-Mahdiyya" ( ar, المهدية). The Ismaili dynasty ruled territories across the Mediterranean coast of Africa and ultimately made Egypt the center of the caliphate. At its height, the caliphate included – in addition to Egypt – varying areas of the Maghreb, Sudan, Sicily, the Levant, and the Hijaz. Between 902 to 909 th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kashan
Kashan ( fa, ; Qashan; Cassan; also Romanization of Persian, romanized as Kāshān) is a city in the northern part of Isfahan province, Iran. At the 2017 census, its population was 396,987 in 90,828 families. Some etymologists argue that the city name comes from the Kasian, the original inhabitants of the city, whose remains are found at Tepe Sialk, Tapeh Sialk dating back 9,000 years; later this was changed to "Kashian", hence the town name. Between the 12th and the 14th centuries Kashan was an important centre for the production of high quality pottery and tiles. In modern Persian language, Persian, the word for a tile (''kashi'') comes from the name of the town. Kashan is divided into two parts, mountainous and desert. In the west side, Kashan is cited in the neighbourhood of two of highest peaks of Karkas chain, Mount Gargash to the southwest of Kashan (the home of Iran national observatory, the largest astronomical telescope of Iran) and Mount Ardehaal in the west of K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diopside
Diopside is a monoclinic pyroxene mineral with composition . It forms complete solid solution series with hedenbergite () and augite, and partial solid solutions with orthopyroxene and pigeonite. It forms variably colored, but typically dull green crystals in the monoclinic prismatic class. It has two distinct prismatic cleavages at 87 and 93° typical of the pyroxene series. It has a Mohs hardness of six, a Vickers hardness of 7.7 GPa at a load of 0.98 N, and a specific gravity of 3.25 to 3.55. It is transparent to translucent with indices of refraction of nα=1.663–1.699, nβ=1.671–1.705, and nγ=1.693–1.728. The optic angle is 58° to 63°. Formation Diopside is found in ultramafic ( kimberlite and peridotite) igneous rocks, and diopside-rich augite is common in mafic rocks, such as olivine basalt and andesite. Diopside is also found in a variety of metamorphic rocks, such as in contact metamorphosed skarns developed from high silica dolomites. It is an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wollastonite
Wollastonite is a calcium inosilicate mineral ( Ca Si O3) that may contain small amounts of iron, magnesium, and manganese substituting for calcium. It is usually white. It forms when impure limestone or dolomite is subjected to high temperature and pressure, which sometimes occurs in the presence of silica-bearing fluids as in skarns or in contact with metamorphic rocks. Associated minerals include garnets, vesuvianite, diopside, tremolite, epidote, plagioclase feldspar, pyroxene and calcite. It is named after the English chemist and mineralogist William Hyde Wollaston (1766–1828). Despite its chemical similarity to the compositional spectrum of the pyroxene group of minerals—where magnesium (Mg) and iron (Fe) substitution for calcium ends with diopside and hedenbergite respectively—it is structurally very different, with a third tetrahedron in the linked chain (as opposed to two in the pyroxenes). Production trends Estimated world production of crude wollastonite ore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baghdad
Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesiphon. In 762 CE, Baghdad was chosen as the capital of the Abbasid Caliphate, and became its most notable major development project. Within a short time, the city evolved into a significant cultural, commercial, and intellectual center of the Muslim world. This, in addition to housing several key academic institutions, including the House of Wisdom, as well as a multiethnic and multi-religious environment, garnered it a worldwide reputation as the "Center of Learning". Baghdad was the largest city in the world for much of the Abbasid era during the Islamic Golden Age, peaking at a population of more than a million. The city was largely destroyed at the hands of the Mongol Empire in 1258, resulting in a decline that would linger through man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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