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West Mexican smiths worked primarily in copper during the initial period, with some low-arsenic alloys, as well as occasional employment of silver and gold. Lost-wax cast bells were introduced from lower Central America and Colombia during this phase, along with several classes of cold-worked ornaments and hand tools, such as needles and tweezers.
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.
Harry Brearley (18 February 1871 – 14 July 1948) was an English metallurgist, credited with the invention of "rustless steel" (later to be called "stainless steel" in the anglophone world). Based in Sheffield , his invention brought affordable cutlery to the masses, and saw an expansion of the city's traditional cutlery trade.
A wax pattern used to create a jet engine turbine blade. Castings can be made from an original wax model (the direct method) or from wax replicas of an original pattern that need not be made from wax (the indirect method). The following steps describe the indirect process, which can take two to seven days to complete.
As the name suggests, the lost-wax method is to use wax as a mold, and heat it to melt the wax mold and lose it, thereby casting bronze ware, making the model (the outer layer of the wax model is coated with mud), lost-wax (heating to make the wax flow out), pouring copper liquid to fill the cavity left by the wax model, etc.
These are mostly gold or a gold alloy (with copper or silver) and have been found to be largely cold hammered and sand-polished alluvial nuggets, although a few items seem to have been produced by lost wax casting. It is presumed that at least some of these items were acquired by trade from Colombia. [39]
The team found Corinthian alabaster, Attic vases, and locally-made ritual jugs. They also uncovered treasure of a shinier kind: gold, silver, coral, and amber jewelry, amulets from the East, and ...
10th century BC – Glass production begins in ancient Near East; 1st millennium BC – Pewter beginning to be used in China and Egypt; 1000 BC – The Phoenicians introduce dyes made from the purple murex. [1] 3rd century BC – Wootz steel, the first crucible steel, is invented in ancient India; 50s BC – Glassblowing techniques flourish in ...