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Illustration of stepwise bronze casting by the lost-wax method. Lost-wax casting – also called investment casting, precision casting, or cire perdue (French: [siʁ pɛʁdy]; borrowed from French) [1] – is the process by which a duplicate sculpture (often a metal, such as silver, gold, brass, or bronze) is cast from an original sculpture.
The first coat of clay is usually carefully brushed to prevent trapping of air bubbles; subsequent coats may be rougher. Then, the clay is fired and the wax melts (thus "lost wax"). Molten metal is then poured into the clay mould to replace the burnt wax model. After the metal cools, the fired-clay model is opened to reveal the finished product.
Jewellery in the Indus Valley Civilization was worn predominantly by females, who wore numerous clay or shell bracelets on their wrists. They were often shaped like doughnuts and painted black. Over time, clay bangles were discarded for more durable ones. In present-day India, bangles are made out of metal or glass. [55]
In the 14th century, decorative plasterwork called pargeting was being used in South-East England to decorate the exterior of timber-framed buildings. This is a form of incised, moulded or modelled ornament, executed in lime putty or mixtures of lime and gypsum plaster.
A bulla (or clay envelope) and its contents on display at the Louvre. Uruk period (4000–3100 BC).. A bulla (Medieval Latin for "a round seal", from Classical Latin bulla, "bubble, blob"; plural bullae) is an inscribed clay, soft metal (lead or tin), bitumen, or wax token used in commercial and legal documentation as a form of authentication and for tamper-proofing whatever is attached to it ...
Mold gold cape, British Museum. The cape is 458 mm (18.0 in) wide. It was designed to fit someone of a very slight build, perhaps a teenager, and although the sex of the person buried in this grave remains unclear, the associated finds are likely, by comparison with similar contemporary graves discovered, to be those accompanying the burial of a woman. [9]
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