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Craquelure
Craquelure (french: craquelé; it, crettatura) is a fine pattern of dense cracking formed on the surface of materials. It can be a result of drying, aging, intentional patterning, or a combination of all three. The term is most often used to refer to tempera or oil paintings, but it can also develop in old ivory carvings or painted miniatures on an ivory backing. Recently, analysis of craquelure has been proposed as a way to authenticate art. In ceramics, craquelure in ceramic glazes, where it is often a desired effect, is called "crackle"; it is a characteristic of Chinese Ge ware in particular. This is usually differentiated from crazing, which is a glaze defect in firing, or the result of aging or damage. In painted surfaces Painting systems are composed of complex layers with unique mechanical properties that depend on the type of drying oil or paint medium used and the presence of paint additives, such as organic solvents, surfactants, and plasticizers. Understanding the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ge Ware
Ge ware or Ko ware () is a type of celadon or greenware in Chinese pottery. It was one of the Five Great Kilns of the Song dynasty recognised by later Chinese writers, but has remained rather mysterious to modern scholars, with much debate as to which surviving pieces, if any, actually are Ge ware, whether they actually come from the Song, and where they were made. In recognition of this, many sources call all actual pieces Ge-type ware. It is clear that their distinguishing feature is deliberate crackle, or a network of cracks in the glaze; but this is not restricted to them, and in particular the related Guan ware uses very similar effects. Ge ware often shows "double crackle" or crackle of two types, and one view is that this is the defining characteristic of the type. A three-day conference at the Shanghai Museum in 1992 attempted to reach a clear definition of Ge ware, but could not reconcile all views. History "Ge" ( zh, 哥) means "older brother" and the ware apparent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crazing
Crazing is the phenomenon that produces a network of fine cracks on the surface of a material, for example in a glaze layer. Crazing frequently precedes fracture in some glassy thermoplastic polymers. As it only takes place under tensile stress, the plane of the crazing corresponds to the stress direction. The effect is visibly distinguishable from other types of fine cracking because the crazing region has different refractive indices from surrounding material. Crazing occurs in regions of high hydrostatic tension, or in regions of very localized yielding, which leads to the formation of interpenetrating microvoids and small fibrils. If an applied tensile load is sufficient, these bridges elongate and break, causing the microvoids to grow and coalesce; as microvoids coalesce, cracks begin to form. Polymers Crazing occurs in polymers, because the material is held together by a combination of weaker Van der Waals forces and stronger covalent bonds. Sufficient local stress over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mona Lisa Detail Eyes
Mona may refer to: People *Mona (name), a female given name, nickname and surname *Mona (Angolan footballer) (born 1997) *Mona, ring name of American wrestler Nora Greenwald Museums *Museum of Nebraska Art, Kearney, Nebraska, US *Museum of Neon Art, Los Angeles, California, United States *Museum of Northwest Art, La Conner, Washington, United States *Museum of Old and New Art, Hobart, Tasmania, Australia Music *Mona (band), a Nashville-located alternative rock band ** ''Mona'' (album), released in 2011 *"Mona", a song by James Taylor from his 1985 album ''That's Why I'm Here'' *"Mona", a song by the Beach Boys from their 1977 album '' Love You'' *''Mona – The Carnivorous Circus'', a 1970 record by The Deviants *"Mona (I Need You Baby)", a 1957 song by Bo Diddley * ''Mona'' (opera), a 1912 opera by Horatio Parker Places Settlements *Mona, Anglesey, a village on the Welsh island of Anglesey (in the UK) *Mona, Iowa, United States, an unincorporated community *Mona, Jamaica, a res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Energy
In surface science, surface free energy (also interfacial free energy or surface energy) quantifies the disruption of intermolecular bonds that occurs when a surface is created. In solid-state physics, surfaces must be intrinsically less energetically favorable than the bulk of the material (the atoms on the surface have more energy compared with the atoms in the bulk), otherwise there would be a driving force for surfaces to be created, removing the bulk of the material (see sublimation). The surface energy may therefore be defined as the excess energy at the surface of a material compared to the bulk, or it is the work required to build an area of a particular surface. Another way to view the surface energy is to relate it to the work required to cut a bulk sample, creating two surfaces. There is "excess energy" as a result of the now-incomplete, unrealized bonding at the two surfaces. Cutting a solid body into pieces disrupts its bonds and increases the surface area, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Pottery
Chinese ceramics show a continuous development since pre-dynastic times and are one of the most significant forms of Chinese art and ceramics globally. The first pottery was made during the Palaeolithic era. Chinese ceramics range from construction materials such as bricks and tiles, to hand-built pottery vessels fired in bonfires or kilns, to the sophisticated Chinese porcelain wares made for the imperial court and for export. Porcelain was a Chinese invention and is so identified with China that it is still called "china" in everyday English usage. Most later Chinese ceramics, even of the finest quality, were made on an industrial scale, thus few names of individual potters were recorded. Many of the most important kiln workshops were owned by or reserved for the emperor, and large quantities of Chinese export porcelain were exported as diplomatic gifts or for trade from an early date, initially to East Asia and the Islamic world, and then from around the 16th century to Eur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean Pottery
Korean ceramic history begins with the oldest earthenware from around 8000 BC. Throughout the history, the Korean peninsula has been home to lively, innovative, and sophisticated art making. Long period of stability have allowed for the establishment of spiritual traditions, and artisan technologies specific to the region. Korean ceramics in Neolithic period have a unique geometric patterns of sunshine, or it's decorated with twists. In Southern part of Korea, Mumun pottery were popular. Mumun togi used specific minerals to make colors of red and black. Korean pottery developed a distinct style of its own, with its own shapes, such as the moon jar or Buncheong sagi which is a new form between earthenware and porcelain, white clay inlay celadon of Goryeo, and later styles like minimalism that represents Korean Joseon philosophers' idea. Many talented Korean potters were captured and brought to Japan during the invasions of Korea, where they heavily contributed to advancing Japane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5. It is the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures. In mathematics Four is the smallest composite number, its proper divisors being and . Four is the sum and product of two with itself: 2 + 2 = 4 = 2 x 2, the only number b such that a + a = b = a x a, which also makes four the smallest squared prime number p^. In Knuth's up-arrow notation, , and so forth, for any number of up arrows. By consequence, four is the only square one more than a prime number, specifically three. The sum of the first four prime numbers two + three + five + seven is the only sum of four consecutive prime numbers that yields an odd prime number, seventeen, which is the fourth super-prime. Four lies between the first proper pair of twin primes, three and five, which are the first two Fermat primes, like seventeen, which is the third. On the other hand, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentimento
A pentimento (plural pentimenti), in painting, is "the presence or emergence of earlier images, forms, or strokes that have been changed and painted over". The word is , from the verb , meaning 'to repent'. Significance Pentimenti may show that a composition originally had an element, for example, a head or a hand, in a slightly different place, or that an element no longer in the final painting was originally planned. The changes may have been done in the underdrawing of the painting, or by the visible layers of paint differing from the underdrawing, or by the first painted treatment of the element having been over-painted. Some pentimenti have always been visible on the final painting with careful inspection; others are revealed by the increasing transparency that some paint acquires after several centuries. Others, especially in the underdrawing, can only be seen with modern methods such as X-rays and infrared reflectography and photographs. These are able to record photogr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orange Coast (magazine)
''Orange Coast'' is an American lifestyle magazine published for the Orange County, California region. Established in February 1974, ''Orange Coast'' is the oldest continuously published lifestyle magazine in the region. ''Orange Coast'' includes coverage of the region'a people, places, cuisine, fashion, home design and décor, and events. The magazine is currently owned by Hour Media Group, LLC. The magazine was re-imagined in June 2008 and again in August 2017. It is a member of the City and Regional Magazine Association (CRMA). Previous owners of the publication include Emmis Publishing Emmis Communications is an American media conglomerate based in Indianapolis, Indiana. Emmis, based on the Hebrew word for Truth (Emet) was founded by Jeff Smulyan in 1980. Emmis has owned many radio stations, including KPWR and WQHT, which hav ..., which acquired it in July 2007. References External links * 1974 establishments in California Lifestyle magazines published in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formaldehyde
Formaldehyde ( , ) (systematic name methanal) is a naturally occurring organic compound with the formula and structure . The pure compound is a pungent, colourless gas that polymerises spontaneously into paraformaldehyde (refer to section Forms below), hence it is stored as an aqueous solution (formalin), which is also used to store animal specimens. It is the simplest of the aldehydes (). The common name of this substance comes from its similarity and relation to formic acid. Formaldehyde is an important precursor to many other materials and chemical compounds. In 1996, the installed capacity for the production of formaldehyde was estimated at 8.7 million tons per year. It is mainly used in the production of industrial resins, e.g., for particle board and coatings. Forms Formaldehyde is more complicated than many simple carbon compounds in that it adopts several diverse forms. These compounds can often be used interchangeably and can be interconverted. *Molecular formald ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tony Tetro
Anthony Gene Tetro (born 1950), known as Tony Tetro, is an art forger known for his perfectionism in copies of artwork produced in the 1970s and 1980s. Tetro never received formal art lessons, but learned from books, by painting and experimentation. Over three decades, Tetro forged works by Rembrandt, Joan Miró, Marc Chagall, Salvador Dalí and Norman Rockwell and others. Tetro's paintings and lithographs, known for their perfectionism, were sold by art dealers and auction houses as legitimate works and hang in museums, galleries around the world. He was caught after Hiro Yamagata found a forgery of his own work for sale in a gallery. In 1991, Tetro was called by Gary Helton, an investigator for a California district attorney, as being "one of the two major rtforgers in the United States." Early years Tetro was born in Fulton, Oswego County, New York, one of four children to Beatrice and James Tetro, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eric Hebborn
Eric Hebborn (20 March 1934 – 11 January 1996) was an English painter, draughtsman, art forger and later an author. Early life Eric Hebborn was born in South Kensington, London in 1934. His mother was born in Brighton and his father in Oxford. According to his autobiography, his mother beat him constantly as a child. At the age of eight, he states that he set fire to his school and was sent to Longmoor reformatory in Harold Wood, although his sister Rosemary disputes this. Teachers encouraged his painting talent and he became connected to the Maldon Art Club, where he first exhibited at the age of 15. Hebborn attended Chelmsford Art School and Walthamstow Art School before attending the Royal Academy. He flourished at the academy, winning the Hacker Portrait prize and the Silver Award, and the British Prix de Rome in Engraving, a two-year scholarship to the British School at Rome in 1959. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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