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.
Ores of iron were dug up and smelted in prehistoric times. Evidence clearly estabilishes the first know working of iron from ore in India in the second millennium BC. As such, the discovery of iron and iron ores cannot be attributed to any given individual or specific time.