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The lost-wax technique did not appear in northern China until the 6th century BC. [19] Lost-wax casting is known as rÅgata in Japanese, and dates back to the Yayoi period, c. 200 BC. [16] The most famous piece made by cire perdue is the bronze image of Buddha in the temple of the Todaiji monastery at Nara. [16]
The metal pieces were made using lost-wax casting and are considered among the best African sculptures made using this technique. [21] Benin began to trade ivory, pepper, and slaves [ 22 ] with the Portuguese in the late 15th century and incorporated the use of manillas (brass ingots in the form of bracelets, bought from the Portuguese) as a ...
Produce wax patterns: Although called wax patterns, pattern materials may also include plastic and frozen mercury. [6] Wax patterns can be produced in one of two ways. In one process, the wax is poured into the mould and swished around until an even coating, usually about 3 mm (0.12 in) thick, covers the inner surface of the mould.
Dhokra (also spelt Dokra) is non–ferrous metal casting using the lost-wax casting technique. This sort of metal casting has been used in India for over 4,000 years and is still used. One of the earliest known lost wax artifacts is the dancing girl of Mohenjo-daro. [1]
Wax patterns are used in an alternative casting process called investment casting. A combination of paraffin wax, bees wax and carnauba wax is used for this purpose. In this case the wax "pattern" is melted out from the mould cavity which is normally a rigid plaster like material rather than sand, so the wax "pattern" can only be used once. [5]
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Evaporative-pattern casting is a type of casting process that uses a pattern made from a material that will evaporate when the molten metal is poured into the molding cavity. The most common evaporative-pattern material used is polystyrene foam. [1] The two major evaporative-pattern casting processes are: [1] Lost-foam casting; Full-mold casting
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