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.
People who lived in China learned how to make iron by around 700 or 600 BC, during the Eastern Chou dynasty. By 300 BC, iron-workers in Greece were burning coal to get hotter fires. By about 300 AD, people in West Africa and East Africa had also learned the secrets of making iron.