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Umber (other)
Umber is a natural earth pigment consisting of iron oxide and manganese oxide; it has a brownish color that can vary among shades of yellow, red, and green. Umber is considered one of the oldest pigments known to humans, first seen in Ajanta Caves in 200 BC – 600 AD. Umber's advantages are its highly versatile color, warm tone, and quick drying abilities. While some sources indicate that umber's name comes from its geographic origin in Umbria, other scholars suggest that it derives from the Latin word ''umbra'', which means "shadow". The belief that its name derives from the word for shadow is fitting, as the color helps create shadows. The color is primarily produced in Cyprus. Umber is typically mined from Open-pit mining, open pits or Mining, underground mines and ground into a fine powder that is washed to remove impurities. In the 20th century, the rise of synthetic dyes decreased the demand for natural pigments such as umber. History The earliest documented uses of umber ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jules Bastien-Lepage - Pas Mèche (Nothing Doing) - Google Art Project
Jules is the French form of the Latin "Julius" (e.g. Jules César, the French name for Julius Caesar). It is the given name of: People with the name *Jules Aarons (1921–2008), American space physicist and photographer *Jules Abadie (1876–1953), French politician and surgeon *Jules Accorsi (born 1937), French football player and manager *Jules Adenis (1823–1900), French playwright and opera librettist *Jules Adler 1865–1952), French painter *Jules Asner (born 1968), American television personality *Jules Aimé Battandier (1848–1922), French botanist *Jules Bernard (born 2000), American basketball player *Jules Bianchi (1989–2015), French Formula One driver *Jules Breton (1827–1906), French Realist painter *Jules-André Brillant (1888–1973), Canadian entrepreneur *Jules Brunet (1838–1911), French Army general *Jules Charles-Roux (1841–1918), French businessman and politician *Jules Dewaquez (1899–1971), French footballer *Jules Marie Alphonse Jacques de Dixmu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underpainting
In art, an underpainting is an initial layer of paint applied to a ground, which serves as a base for subsequent layers of paint. Underpaintings are often monochromatic and help to define color values for later painting. Underpainting gets its name because it is painting that is intended to be painted over (see overpainting) in a system of working in layers. There are several different types of underpainting, such as veneda, verdaccio, morellone, imprimatura and grisaille.''Underpaint.'' In: The different types have different colourings. Grisaille is plain grey. Verdaccio is a grey tending towards yellow or green that brings out more luminous tones. While imprimatura uses earth tones. Underpainting has several advantages over working from a plain canvass. The neutral colours of the underpaint will not distract if they are not completely covered. It also aids the painter in getting a correct tone. Comparing colours to a white background is very different from the colouring of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceramic
A ceramic is any of the various hard, brittle, heat-resistant and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature. Common examples are earthenware, porcelain, and brick. The earliest ceramics made by humans were pottery objects (''pots,'' ''vessels or vases'') or figurines made from clay, either by itself or mixed with other materials like silica, hardened and sintered in fire. Later, ceramics were glazed and fired to create smooth, colored surfaces, decreasing porosity through the use of glassy, amorphous ceramic coatings on top of the crystalline ceramic substrates. Ceramics now include domestic, industrial and building products, as well as a wide range of materials developed for use in advanced ceramic engineering, such as in semiconductors. The word "'' ceramic''" comes from the Greek word (), "of pottery" or "for pottery", from (), "potter's clay, tile, pottery". The earliest k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroxide
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a single covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. It functions as a base, a ligand, a nucleophile, and a catalyst. The hydroxide ion forms salts, some of which dissociate in aqueous solution, liberating solvated hydroxide ions. Sodium hydroxide is a multi-million-ton per annum commodity chemical. The corresponding electrically neutral compound HO• is the hydroxyl radical. The corresponding covalently bound group –OH of atoms is the hydroxy group. Both the hydroxide ion and hydroxy group are nucleophiles and can act as catalysts in organic chemistry. Many inorganic substances which bear the word ''hydroxide'' in their names are not ionic compounds of the hydroxide ion, but covalent compounds which contain hydroxy groups. Hydroxide ion The hydroxide ion is a nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manganese
Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as a rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide. Manganese is also an essential human dietary element, important in macronutrient metabolism, bone formation, and free radical defense systems. It is a critical component in dozens of proteins and enzymes. It is found mostly in the bones, but also the liver, kidneys, and brain. In the human brain, the manganese is bound to manganese metalloproteins, most notably glutamine synthetase in astrocytes. Manganese was first isolated in 1774. It is familiar in the laboratory in the form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron
Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in front of oxygen (32.1% and 30.1%, respectively), forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. In its metallic state, iron is rare in the Earth's crust, limited mainly to deposition by meteorites. Iron ores, by contrast, are among the most abundant in the Earth's crust, although extracting usable metal from them requires kilns or furnaces capable of reaching or higher, about higher than that required to smelt copper. Humans started to master that process in Eurasia during the 2nd millennium BCE and the use of iron tools and weapons began to displace copper alloys, in some regions, only around 1200 BCE. That event is considered the transition from the Bronze Age to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay
Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay particles, but become hard, brittle and non–plastic upon drying or firing. Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide. Clay is the oldest known ceramic material. Prehistoric humans discovered the useful properties of clay and used it for making pottery. Some of the earliest pottery shards have been dated to around 14,000 BC, and clay tablets were the first known writing medium. Clay is used in many modern industrial processes, such as paper making, cement production, and chemical filtering. Between one-half and two-thirds of the world's population live or work in buildings made with clay, ofte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jan Blockx
Jan Blockx (25 January 1851 – 26 May 1912) was a Belgian composer, pianist and teacher. He was a leader of the Flemish nationalist school in music. Biography Born in Antwerp, Blockx studied the piano with Frans Aerts, the organ with Joseph Callaerts and composition with Peter Benoît at the Antwerp Conservatory. When he was still a student he wrote some songs, in Flemish, which became popular. However, his musical education studies were quite irregular, and he was essentially self-taught person. Later he studied with Carl Reinecke at Leipzig. Despite the fact that he was Benoits favorite pupil, Blockx wanted to make his own way in life, independent of his teacher and the Flemish Movement. Unlike Benoit, Blockx never intended his works to have the educational, uplifting effect that was typical for the Flemish Movement. This caused tensions between student and master: despite the fact that Blockx's work helped to spread Flemish music across the Belgian borders and even saved ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antonio Palomino
Acislo Antonio Palomino de Castro y Velasco (165513 April 1726) was a Spanish painter of the Baroque period, and a writer on art, author of ''El Museo pictórico y escala óptica'', which contains a large amount of important biographical material on Spanish artists. Life Antonio Palomino was born to a respectable family at Bujalance, near Córdoba in 1655. He studied philosophy, theology and law at Córdoba, and had lessons in painting from Juan de Valdés Leal, who visited there in 1672, and afterwards from Juan de Alfaro y Gamez in 1675. After taking minor orders Palomino moved to Madrid in 1678, where he associated with Alfaro, Claudio Coello, and Juan Carreño de Miranda, and executed some indifferent frescoes. He soon afterwards married a lady of rank, and, having been appointed ''alcalde'' of the ''mesta'', was himself ennobled; in 1688 he was appointed painter to King Charles II. The artist visited Valencia in 1697, and remained there for three or four years, ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shades Of Green
Varieties of the color green may differ in hue, chroma (also called saturation or intensity) or lightness (or value, tone, or brightness), or in two or three of these qualities. Variations in value are also called tints and shades, a tint being a green or other hue mixed with white, a shade being mixed with black. A large selection of these various colors is shown below. Computer web color greens Green The color defined as ''green'' in the RGB color model is the brightest green that can be reproduced on a computer screen, and is the color named ''green'' in X11. It is one of the three primary colors used in the RGB color space along with red and blue. The three additive primaries in the RGB color system are the three colors of light chosen such as to provide the maximum range of colors that are capable of being represented on a computer or television set. This color is also called ''regular green''. It is at precisely 120 degrees on the HSV color wheel, also kno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cobalt Blue
Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with aluminum(III) oxide (alumina) at 1200 °C. Chemically, cobalt blue pigment is cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl2O4. Cobalt blue is lighter and less intense than the (iron-cyanide based) pigment Prussian blue. It is extremely stable and historically has been used as a coloring agent in ceramics (especially Chinese porcelain), jewelry, and paint. Transparent glasses are tinted with the silica-based cobalt pigment smalt. Historical uses and production Cobalt blue in impure forms had long been used in Chinese porcelain. The first recorded use of ''cobalt blue'' as a color name in English was in 1777. It was independently discovered as a pure alumina-based pigment by Louis Jacques Thénard in 1802. Commercial production began in France in 1807. The leading world manufacturer of cobalt blue in the nineteenth century was Benjamin Wegner's Norwegian company Blaafarveværke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impressionism
Impressionism was a 19th-century art movement characterized by relatively small, thin, yet visible brush strokes, open composition, emphasis on accurate depiction of light in its changing qualities (often accentuating the effects of the passage of time), ordinary subject matter, unusual visual angles, and inclusion of movement as a crucial element of human perception and experience. Impressionism originated with a group of Paris-based artists whose independent exhibitions brought them to prominence during the 1870s and 1880s. The Impressionists faced harsh opposition from the conventional art community in France. The name of the style derives from the title of a Claude Monet work, ''Impression, soleil levant'' ('' Impression, Sunrise''), which provoked the critic Louis Leroy to coin the term in a satirical review published in the Parisian newspaper '' Le Charivari''. The development of Impressionism in the visual arts was soon followed by analogous styles in other media tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
