A thermoplastic is a type of plastic made from polymer resins that becomes a homogenized liquid when heated and hard when cooled.
As similar as colonial iron manufacture was to that of medieval Europe, yet it differed greatly from the type of iron manufacture in eighteenth century early modern Europe. Existing conditions of natural resources greatly affected the development of technical innovation in the field of iron manufacture.
Iron appeared in China toward the end of the period, during the Eastern Zhou dynasty. The earliest Chinese bronzes were made by the method known as piece-mold castingas opposed to the lost-wax method, which was used in all other Bronze Age cultures.