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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]
Centrifugal casting, or centrifuging, [1] is used as a means of casting small, detailed parts or jewelry. [2] An articulated arm is free to spin around a vertical axle, which is driven by an electric motor or a spring. The entire mechanism is enclosed in a tub or drum to contain hot metal should the mold break or an excess of metal be used.
In Mesopotamia, from c. 3500 –2750 BC, the lost-wax technique was used for small-scale, and then later large-scale copper and bronze statues. [4] One of the earliest surviving lost-wax castings is a small lion pendant from Uruk IV. Sumerian metalworkers were practicing lost-wax casting from approximately c. 3500 –3200 BC. [13]
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.
Rio Grande, a Berkshire Hathaway Company since 2013, offers jewelry-making supplies. While specializing in silver findings and fabrication materials, the company also provides metalsmithing tools and equipment, jewelry displays and packaging products, jewelry workbenches, casting machines and kilns, soldering and welding torches, gemstones ...
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After leaving the wholesale business, they opened Service Merchandise, Inc., the first of what evolved into a chain of catalog showrooms. It opened in 1960 at 309 Broadway in downtown Nashville, Tennessee. [1] Older logo mainly used in the 1970s–1985. During the 1970s and 1980s, Service Merchandise was a leading catalog-showroom retailer.
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