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Parkesine, the first member of the Celluloid class of compounds and considered the first man-made plastic, is patented by Alexander Parkes. [4] 1869: John Wesley Hyatt discovers a method to simplify the production of celluloid, making industrial production possible. 1872: PVC was accidentally synthesized in 1872 by German chemist Eugen Baumann ...
An example of gold plated jewelry. Originally, costume or fashion jewelry was made of inexpensive simulated gemstones, such as rhinestones or lucite, set in pewter, silver, nickel, or brass. During the depression years, rhinestones were even down-graded by some manufacturers to meet the cost of production. [1]
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 ...
Comb made from Galalith resembling ivory. Galalith (Erinoid in the United Kingdom) is a synthetic plastic material manufactured by the interaction of casein and formaldehyde. The commercial name is derived from the Ancient Greek words gala (γάλα, "milk") and lithos (λῐ́θος, "stone").
They were also made in a wide range of materials, including silver, brass, tin, gunmetal, nickel silver, gold, bone, ivory and early plastics such as tortoiseshell and bakelite. The more unusual materials included leather, wood , horn, ceramics (usually for table vestas) and the sea bean seed from Entada gigas commonly known as the monkey ...
The retro appeal of old Bakelite products has made them collectible. [4] The creation of a synthetic plastic was revolutionary for the chemical industry, which at the time made most of its income from cloth dyes and explosives. Bakelite's commercial success inspired the industry to develop other synthetic plastics.
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It was gathered in royal treasuries, temples and used for adornment of elite peoples as well as funerary offerings (such as the graves at Ur). Gold is used for personal ornaments, weapons and tools, sheet-metal cylinder seals, vessels such as fluted bowls, goblets and imitation cockle shells, and as additions to sculpture. Gold Cup ...