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The conservation and restoration of copper and copper-alloy objects is the preservation and protection of objects of historical and personal value made from copper or copper alloy. When applied to items of cultural heritage , this activity is generally undertaken by a conservator-restorer .
Alloy Artifacts: "J.H. Williams, The SuperCompany" "Vanished Tool Makers: J.H. Williams & Company, Brooklyn & Buffalo, New York" "James H. Williams, Drop Forging" J.H. Williams Tool Catalog No. 401—A tool catalog, believed to be from the late 1950s.
His system incorporated a fast-drying ink; a durable easy-to-cast metal alloy for making type; a screw press designed for rapid operation; and an adjustable mold for the quick casting of metal type. 1440 Strasbourg France virtual landmark ASME brochure (coming soon) 270: 2019 The Thurston Collection of Laboratory Artifacts at Cornell University
The earliest gold artifacts were discovered at the site of Wadi Qana in the Levant. [13] Silver is estimated to have been discovered in Asia Minor shortly after copper and gold. [14] There is evidence that iron was known from before 5000 BC. [15] The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in ...
These deposits were exploited as early as 1000 AD in the manufacture of tin bronze by Andean cultures, including the later Inca Empire, which considered tin bronze the "imperial alloy". In North America , the only known exploitable source of tin during ancient times is located in the Zacatecas tin province of north central Mexico which supplied ...
Terfenol-D (terbium, dysprosium, and iron), a highly magnetostrictive alloy used in portable speakers such as the SoundBug device; Ferrocerium (cerium, iron) Neodymium magnets, another strong permanent magnet; SmCo ; used for permanent magnets in guitar pickups, headphones, satellite transponders, etc. Scandium hydride
The earliest tin-copper-alloy artifact has been dated to c. 4650 BCE, in a Vinča culture site in Pločnik , and believed to have been smelted from a natural tin-copper ore, stannite. [ 9 ] Other early examples date to the late 4th millennium BCE [ broken anchor ] in Egypt , Susa (Iran) and some ancient sites in China, Luristan (Iran), Tepe ...
Although two definite major alloying compositions for the production of MBII copper-based artifacts, (1)copper with arsenic and (2) copper with tin, are detected, to date no visible connection of specific alloy with specific type of object or different periods has been seen: both alloys appear in similar objects and in burials dated to the ...