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Copper(II) oxide or cupric oxide is an inorganic compound with the formula CuO. A black solid, it is one of the two stable oxides of copper , the other being Cu 2 O or copper(I) oxide (cuprous oxide). As a mineral , it is known as tenorite , or sometimes black copper. It is a product of copper mining and the precursor to many other copper-containing products and chemical compounds.

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46-598: Bidriware is a metal handicraft from the city of Bidar in Karnataka , India. It was developed in the 14th century C.E. during the rule of the Bahmani Sultans . The term "bidriware" originates from the township of Bidar, which is still the chief center of production. The metal used is white brass that is blackened and inlaid with silver . As a native art form, Bidriware obtained a Geographical Indications (GI) registry on 3 January 2006. The origin of Bidriware

92-405: A blue-collar work ethic, are accessible to the general public, and are constructed from materials with histories that exceed the boundaries of Western "fine art" tradition, such as ceramics , glass , textiles , metal and wood . These products are produced within a specific community of practice , and while they mostly differ from the products produced within the communities of art and design,

138-526: A 15th-century fort in Bidar. They say that in some parts of the fort, the soil does not receive sunlight or rain for years on end, and this gives the soil its desired properties. When the artisans go to the fort looking for such soil, they identify it by taste. The fort is a tourist attraction, protected from development but accessible to the public, and the guards do not mind the artisans sneaking out small quantities of soil every now and then. Chemical analysis of

184-470: A 67-year-old Bidri craftsman was awarded Padma Shri Award in March 2023 by President Droupadi Murmu. Bidriware undergoes an eight-stage process: moulding, smoothening by file, designing by chisels, engraving by chisel and hammer, pure silver inlaying, smoothening again, buffing and finally oxidising by soil and ammonium chloride. Bidriware is made from cast white brass ( copper - zinc ratio of 1:16). First,

230-715: A book in Kannada title Karnatakada Bidri Kale (Bidri Art of Karnataka) under the financial assistance of the Department of Kannada and Culture, Government of Karnataka in the year 2012. An English version on Bidri art was published by Karnataka Historical Research Publication in 2017. Handicraft A handicraft is a traditional main sector of craft making and applies to a wide range of creative and design activities that are related to making things with one's hands and skill, including work with textiles , moldable and rigid materials, paper, plant fibers, clay, etc. One of

276-566: A few words of common tourist languages. There are also specialty markets such as: According to the Vietnam Handicrafts Export Association (VIETCRAFT), Vietnam's handicrafts export turnover in 2023 reached US$ 2.2 billion, up 10.5% over 2022. The United States is Vietnam's largest export market, accounting for 35% of total export turnover. Vietnam's handicrafts industry currently has about 600 villages, with over 10 million direct workers. Wickerwork

322-467: A foothold in the present-day market and appeal to younger patrons. New items include USB drive covers, office stationeries such as paper clips, key bunches, lockets, envelope openers, pen stands, lampshades and even floor tiles. National Institute of Design has come up with novel and lighter items that use less silver and therefore cost less. While Bidar in Karnataka and Hyderabad in Telangana are

368-564: A handcrafted item is the paramount criterion; those made by mass production or machines are not handicraft goods. Seen as developing the skills and creative interests of students, generally and sometimes towards a particular craft or trade, handicrafts are often integrated into educational systems, both informally and formally. Most crafts require the development of skill and the application of patience but can be learned by virtually anyone. Like folk art , handicraft output often has cultural and/or religious significance, and increasingly may have

414-400: A mould is formed from soil made malleable by the addition of castor oil and resin. The molten metal is then poured into it to obtain a cast piece which is later smoothened by filing . The casting is now coated with a strong solution of copper sulphate to obtain a temporary black coating over which designs are etched freehand with the help of a metal stylus. This is then secured in a vise and

460-538: A political message as well, as in craftivism . Many crafts become very popular for brief periods of time (a few months, or a few years), spreading rapidly among the crafting population as everyone emulates the first examples, then their popularity wanes until a later resurgence. The Arts and Crafts movement originated as a late-19th-century design reform and social movement principally in Europe, North America and Australia, and continues today. Its proponents are motivated by

506-661: A short period of time. Handicraft production is a small–scale production of products using manual labor. It was especially common in the Middle Ages , during the era of the Industrial Revolution it was mainly supplanted by mass production , however, it still exists for the production of goods such as luxury goods . The "handmade effect" is a phenomenon where consumers exhibit a preference for products that are crafted by human labor rather than produced through automated or robotic processes . This preference

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552-552: A variety of new patterns. The designs range from Indian to international themes with the latest in home and lifestyle accessories. Innovative designs are developed by the National Institute of Fashion Technology (NIFT). Karnataka State Handicrafts Development Corporation Limited is keen on promoting the Bidri art form. The traditional art which is identified with a limited set of designs is now trying to diversify and find

598-653: Is a traditional handicraft industry, based on the use of two basic materials, bamboo and rattan . Vietnam currently has 893 villages specializing in wickerwork, accounting for 24% of the total number of villages, including 647 bamboo and rattan villages and 246 straw and water hyacinth villages. Copper(II) oxide It is produced on a large scale by pyrometallurgy , as one stage in extracting copper from its ores. The ores are treated with an aqueous mixture of ammonium carbonate , ammonia , and oxygen to ultimately give copper(II) ammine complex carbonates, such as [Cu(NH 3 ) 4 ]CO 3 . After extraction from

644-465: Is coordinated by 4 oxygen atoms in an approximately square planar configuration. The work function of bulk CuO is 5.3 eV . As a significant product of copper mining, copper(II) oxide is the starting point for the production of many other copper salts. For example, many wood preservatives are produced from copper oxide. Cupric oxide is used as a pigment in ceramics to produce blue, red, and green, and sometimes gray, pink, or black glazes. It

690-406: Is driven, in large part, by the perception that handmade products symbolically "contain love ." The handmade effect is influenced by two key factors. Firstly, consumers express stronger intentions to purchase handmade products when buying gifts for loved ones, compared to more distant recipients. Secondly, they are willing to pay a higher price for handmade gifts when the purchase is motivated by

736-599: Is explained not only by economic and natural–geographical factors, but also by the support and encouragement of the handicraft industry from the state. There are almost as many variations on the theme of handicrafts as there are crafters with time on their hands, but they can be broken down into a number of categories: Handicrafts are often made for home use and decor. If sold, they are sold in direct sales , gift shops , public markets , and online shopping . In developing countries, handicrafts are sold to locals and as souvenirs to tourists. Sellers tend to speak at least

782-536: Is in fact as practical as it is aesthetic. Handicraft has its roots in the rural crafts —the material-goods necessities—of ancient civilizations, and many specific crafts have been practiced for centuries, while others are modern inventions or popularizations of crafts which were originally practiced in a limited geographic area. Many handcrafters use natural, even entirely indigenous, materials while others may prefer modern, non-traditional materials, and even upcycle industrial materials. The individual artisanship of

828-689: Is incorrectly used as a dietary supplement in animal feed . Due to low bioactivity, negligible copper is absorbed. It is used when welding with copper alloys . A copper oxide electrode formed part of the early battery type known as the Edison–Lalande cell . Copper oxide was also used in a lithium battery type ( IEC 60086 code "G"). Used as moderate blue coloring agent in blue flame compositions with additional chlorine donors and oxidizers such as chlorates and perchlorates. Providing oxygen it can be used as flash powder oxidizer with metal fuels such as magnesium, aluminium, or magnalium powder. Sometimes it

874-506: Is particularly pronounced for products with higher symbolic value, where expressing one's beliefs and personality holds greater significance. Consumers , especially in contexts emphasizing symbolic consumption, have a stronger motivation for uniqueness and associate human labor more closely with product uniqueness. In product categories where mechanical production is common, consumers are more attracted to products labeled as handmade. The positive handmade effect on product attractiveness

920-595: Is tarkashi and tainishan, seldom combinations of zarnishan or tainishan and tarkashi or aftabi are also used in different compositions. Majorly silver inlay is used as it provides better contrast with black metal, in few cases copper or precious metal as gold is also used. Most common types of motifs used are either floral or geometrical, with influences from Persian, Southern India, and later from Europe. Traditionally, flower motifs consists of asharfi-ki-booti, leaves (vine creepers), geometric designs, human figures, stylized poppy plants with flowers, etc. are commonly found on

966-637: Is usually attributed to the Bahamani sultans who ruled Bidar in the 14th–15th centuries. Bidriware techniques and style are influenced by Persian art . The art form developed in the kingdom that was a mix of Turkish, Persian and Arabic influences which were intermingled with the local styles and thus a unique style of its own was born. Abdullah bin Kaiser, a craftsman from Iran was invited by the Sultan Ahmed Shah Bahmani to work on decorating

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1012-488: The guild system. Adolescents were apprenticed to a master craftsman and refined their skills over a period of years in exchange for low wages. By the time their training was complete, they were well equipped to set up in trade for themselves, earning their living with the skill that could be traded directly within the community, often for goods and services. The Industrial Revolution and the increasing mechanization of production processes gradually reduced or eliminated many of

1058-408: The market . Mostly these were household products: dishes, furniture, jewelry, souvenirs, clothes, shoes. However, over time, other goods, such as weapons , began to go on sale. In pre–revolutionary Russia , handicraft production was quite widespread: about 30% of all manufactured products were produced by handicraft methods. Products were sold at fairs , and barter exchange was widespread. With

1104-588: The Bidri work mingled into the local arts soon. Gulbarga-based artist Rehaman Patel has done extensive research on Bidri art, collecting evidence of the historical background of Bidri, methods of making Bidri, critical review of Bidri collections in India and non-Indian museums, and the introduction of Bidri artisans. Patel was a fellow of Karnataka Shilpakala Academy Bangalore for the year 2014–15. He submitted documentation on "International collection of Bidri Art". The Indian Royal Academy of Art and Culture has published

1150-429: The aforementioned soil shows it to be rich in alkaline nitrates. It is believed that the nitrates oxidize the copper in the brass to create copper(II) oxide , which is black in color. Sunlight breaks down nitrate, which would explain why the soil in the parts of the fort that are sheltered from sunlight is rich in nitrates. This artistic metallic work is on the revival path after the introduction of innovative designs and

1196-652: The beginning of industrialisation and collectivization of the Soviet Union, the handicraft mode of production was declared "the highest degree of oppression of the working people" and ceased to exist in almost all spheres of the Soviet economy except on an informal basis. Some state economies, such as that of Vietnam , are largely based on handicraft production. For example, in the 1950s in North Vietnam , there were more than 100,000 handicraft enterprises. In

1242-477: The boundaries often overlap, resulting in hybrid objects. Additionally, as the interpretation and validation of art is frequently a matter of context, an audience may perceive handcrafted objects as art objects when these objects are viewed within an art context, such as in a museum or in a position of prominence in one's home. Simple "arts and crafts" projects are a common elementary and middle school activity in both mainstream and alternative education systems around

1288-740: The census of India in 1961, Syed Tassaduq Hussain, a first National awardee in 1969, was the head of the Gulistan Cooperative Society in Bidar. The other notable national awardees are Abdul Hakeem, Mohammed Najeeb Khan, Shah Majeed Quadri, Mohammed Moizuddin, Mohammed Abdul Rauf and Mohammed Saleemuddin. Shah Rasheed Ahmed Quadari is a recipient of several awards including a National award which he received in 1988, Karnataka state award in 1984, Rajyostava award in 2006, Great Indian Achievement award in 2004, and District Rajyotsava award in 1996. The Government of India awarded him with Shilp Guru award in 2015. Shah Rasheed Ahmed Quadari,

1334-446: The corresponding hydrated copper(II) salts: In presence of water it reacts with concentrated alkali to form the corresponding cuprate salts: It can also be reduced to copper metal using hydrogen , carbon monoxide , and carbon : When cupric oxide is substituted for iron oxide in thermite the resulting mixture is a low explosive, not an incendiary. Copper(II) oxide belongs to the monoclinic crystal system . The copper atom

1380-434: The craftsman uses small chisels to engrave the design over the freehand etching. Fine wire or flattened strips of pure silver are then carefully hammered into these grooves. The article then is filed, buffed and smoothed to get rid of the temporary black coating. This results in rendering the silver inlay hardly distinguishable from the white brass. The bidriware is now ready for the final blackening process. Traditionally,

1426-419: The craftsmen of Bidar use soil taken from the grounds of a 15th century fort in Bidar , which is rich in potassium nitrate. The soil is mixed with ammonium chloride and water to produce a paste which is then rubbed onto a heated brass surface. The paste darkens the brass but not the silver inlay. The black patina is a mixture of zinc oxide and copper(II) oxide (Cu 2 O). It is the copper oxide that gives

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1472-402: The desire to convey love rather than simply acquiring the best-performing product. The handicraft method of production has been used by people since ancient times. Initially, people engaged in handicraft production aimed to satisfy the needs of their own economy, however, with the development of commodity–money relations , an increasing number of goods produced by them began to be supplied to

1518-528: The early 1970s, even before the end of the war , handicraft production provided about half of all the products of the local industry and almost a third of the total industrial production of the republic. By 1977, after the reunification of Vietnam, there were 700,000 handicraftsmen in South Vietnam . Handicraft production in Nepal withstands competition with industrial production and foreign goods, which

1564-513: The engraving and polishing. Also found here is the gharki , a less sophisticated variant of the Bidri. Another variant of the bidriwork can be seen in Lucknow's Zar Buland, where the ornamental designs are raised above the surface. In Aurangabad , the Bidri art was introduced by the Nizam of Hyderabad as it was a part of Nizam's empire then. As Aurangabad has its own rich legacy of art and craft,

1610-507: The ideals of movement founders such as William Morris and John Ruskin , who proposed that in pre-industrial societies, such as the European Middle Ages , people had achieved fulfillment through the creative process of handicrafts. This was held up in contrast to what was perceived to be the alienating effects of industrial labor. These activities were called crafts because originally many of them were professions under

1656-685: The items. Demand for the patterns of Persian roses and passages from the Quran in Arabic script are also in great demand in the West. Earlier, bidriware was used for hookahs, paan-holders, and vases but now keepsakes, bowls, earrings, trays, ornament boxes, other jewelry and showpiece items are made from it. In Aurangabad, artisans also make patterns of motifs from Ajanta Caves especially Ajanta Padmapani which have become very popular among foreign tourists Bidri artisans blacken their wares using soil obtained from

1702-583: The materials that surround us for economical, cultural and environmental purposes. Secondary schools and college and university art departments increasingly provide elective options for more handicraft-based arts, in addition to formal " fine arts ", a distinction that continues to fade throughout the years, especially with the rise of studio craft , i.e. the use of traditional handicrafts techniques by professional fine artists. Many community centers and schools run evening or day classes and workshops, for adults and children, offering to teach basic craft skills in

1748-437: The matte coating. The finished product appears black with brilliant silver inlay. There are several techniques employed in making of bidriware, tarkashi (Inlay of sheets), tainishan (inlay of sheets), zarnishan (low relief), Zarbuland (high relief), aftabi (cut out design in overlaid material sheet). It is not compulsory to use a single technique for an object, generally two or more techniques are combined. Most common combination

1794-657: The most vibrant centers, this art is also practiced in few other parts of the country like Purnia in Bihar , Lucknow in Uttar Pradesh and Murshidabad in West Bengal . The designs are mostly conventional, including creepers, flowers and sometimes human figures. In Bellori, a village near Purnia, local craftsmen known as the Kansaris are engaged in molding and turning bidri vessels. The sonars (goldsmith) then do

1840-552: The needs of the people in their locality without using machines. Collective terms for handicrafts include artisanry , crafting , and handcrafting . The term arts and crafts is also applied, especially in the United States and mostly to hobbyists' and children's output rather than items crafted for daily use, but this distinction is not formal, and the term is easily confused with the Arts and Crafts design movement, which

1886-560: The oldest handicraft is Dhokra ; this is a sort of metal casting that has been used in India for over 5,000 years and is still used. In Iranian Baluchistan , women still make red ware hand-made pottery with dotted ornaments, much similar to the 4,000-year-old pottery tradition of Kalpurgan, an archaeological site near the village. Usually, the term is applied to traditional techniques of creating items (whether for personal use or as products) that are both practical and aesthetic. Handicraft industries are those that produce things with hands to meet

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1932-424: The patina its black color (zinc oxide is white). The ammonium chloride that is applied to the bidriware selectively dissolves the zinc on the surface of the brass, leaving a copper-rich surface that is oxidized by the potassium nitrate. The paste then rinsed off to reveal a shiny silver design that is striking in contrast against the black surface. As a finishing touch, oil is applied to the finished product to deepen

1978-517: The residues and after separation from iron, lead, etc. impurities, the carbonate salt is decomposed with steam to give CuO. It can be formed by heating copper in air at around 300–800 °C: For laboratory uses, copper(II) oxide is conveniently prepared by pyrolysis of copper(II) nitrate or basic copper(II) carbonate : Dehydration of cupric hydroxide has also been demonstrated: Copper(II) oxide reacts with mineral acids such as hydrochloric acid , sulfuric acid , and nitric acid to give

2024-482: The roles professional craftspeople played, and today many handicrafts are increasingly seen, especially when no longer the mainstay of a formal vocational trade , as a form of hobby , folk art and sometimes fine art . The term handicrafts can also refer to the products themselves of such artisanal efforts, that require specialized knowledge, maybe highly technical in their execution, require specialized equipment and/or facilities to produce, involve manual labor or

2070-632: The royal palaces and courts. According to some accounts, Kaiser worked with local craftsmen and the partnership resulted in bidriware under the rule of Ahmed Shah and his son Second Alauddin Bahmani. Along with local artisans, the art spread far and wide and was handed over to generations as time passed. Bidri art researcher Rehaman Patel shares that the awardees also had shown their skills by exhibiting varieties of Bidri art in foreign countries. There are craftsmen in this art practice who took this practice to national and international recognition. According to

2116-745: The world. In some of the Scandinavian or Nordic countries, more advanced handicrafts form part of the formal, compulsory school curriculum, and are collectively referred to as slöjd in Swedish, and käsityö in Finnish. Students learn how to work mainly with metal, textile and wood, not for professional training purposes as in American vocational–technical schools , but with the aim to develop children's and teens' practical skills, such as everyday problem-solving ability, tool use, and understanding of

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